How to Build Your NVQ Level 3 Electrical Portfolio (Without Losing Your Mind) 

  • Technical review: Thomas Jevons (Head of Training, 20+ years)
  • Employability review: Joshua Jarvis (Placement Manager)
  • Editorial review: Jessica Gilbert (Marketing Editorial Team)
Electrician diagnosing electrical faults with testing equipment and illustrated icons representing safe isolation, overload analysis, and certification
Unit 318 assesses structured fault diagnosis, safe testing procedures, and professional documentation of rectified electrical faults

So, you’ve done your Level 2, Level 3 electrical installation, and 18th Edition. Congrats, honestly. But now you’re looking at the 2357 NVQ and thinking, “Right, what’s actually needed to get fully qualified?” Let me break this down for you. 

If you’re one of the “I’ve got no experience and I’ve got no work” crowd, then fear not. We can help with our guaranteed work placement for your NVQ Level 3 Electrical. 

This article is for apprentices, improvers, and adult career-changers who are ready to convert real site experience into a recognised Level 3 competence. I’m going to give you a clear understanding of what the portfolio actually is (not just what you need to submit), explain each unit in plain English with real-world examples, and show exactly how to gather, label, and upload evidence so nothing stalls your portfolio. 

We’ll cover what to prepare before you start, the Skill Scan, proof of your Level 2 and Level 3 Diplomas, 18th Edition, and how we use OneFile to track progress. I’ll outline the seven practical units you must complete with specific job examples showing what assessors look for, what a good site looks like for observations, and the two Health & Safety assessments that must be months apart. You’ll get a ready-to-use pack list for RAMS, Work Programmes, EICs, MWCs, and Witness Testimonies, plus multiple photo-evidence examples (because “before, during, after” with proper context is what speeds assessor sign-off). We’ll also cover common pitfalls, realistic timelines, and what happens after you pass AM2 on the way to your ECS JIB Gold Card. 

Electrician documenting electrical installation work for NVQ Level 3 portfolio evidence
Building an NVQ portfolio requires systematic documentation of your electrical work alongside technical competence

Understanding the NVQ Portfolio: What You're Actually Building

Before diving into the specific units and checklists, let’s clarify what an NVQ portfolio actually is, because honestly, the misunderstanding here causes most of the delays and frustrations. 

What an NVQ Portfolio Actually Is (and Isn’t) 

The NVQ Level 3 Electrical Installation (2357) portfolio is a regulated compilation of workplace evidence demonstrating “workplace competence.” That means proving you can perform electrical tasks safely and consistently in real environments, aligned with National Occupational Standards. 

What it IS: 

  • A structured validation of your ability to do the job repeatedly and reliably 
  • Proof that you can apply knowledge under normal site pressures 
  • A legal record of workplace performance required for JIB Gold Card status 
  • Evidence of competence meeting BS 7671 standards in real-world conditions 

What it ISN’T: 

  • A diary of where you’ve worked or how many hours you’ve clocked 
  • A collection of your “best bits” from various jobs 
  • Something you can rush through in a month because you’re experienced 
  • Just paperwork (it’s proof of actual competence) 

Here’s the thing that trips people up: having 20 years of experience doesn’t automatically translate into a portfolio. The portfolio is the demonstration of that experience filtered through specific assessment criteria. You need to prove you can do tasks consistently, not just that you’ve done them once. 

The assessment focuses on repeatability. Assessors want to see that you can perform tasks safely and correctly across different situations, not just complete them in ideal conditions. This is why a single photo of a finished consumer unit doesn’t cut it. They need to see the process, the decision-making, the compliance checks. 

How NVQ Units Work in Real Jobs 

Here’s something that makes the portfolio less daunting once you understand it: the units aren’t separate, isolated tasks. They overlap naturally because that’s how real electrical work happens. 

When you install a distribution board in a commercial office, you’re simultaneously covering: 

  • Unit 311 (Health & Safety): Safe isolation, appropriate PPE, risk assessment 

  • Unit 315 (Installation): Cable selection, containment, equipment mounting 

  • Unit 316 (Terminations): Correctly terminating incoming supply and outgoing circuits 

  • Unit 317 (Testing): Verifying installation before energising 

A single well-documented job can contribute evidence across multiple units. Assessors cross-reference your evidence to ensure comprehensive coverage without artificial separation. This structure reflects job complexity where units interconnect logically, making portfolios appear intricate yet rooted in practical workflows rather than isolated exercises. 

The key is documenting as you go, not trying to remember which job six months ago covered which unit. 

Types of Evidence Assessors Actually Accept 

Assessors evaluate evidence using the “VACS” principle: Valid, Authentic, Current, and Sufficient. 

Valid evidence means it actually demonstrates what you claim. A photo of a finished installation doesn’t prove you did the installation or understood the decisions made. A photo sequence showing cable routing, termination process, and testing with your written explanation of why you chose that route? That’s valid. 

Authentic evidence means you did the work, not your supervisor or colleague. This is why witness testimonies matter. “We installed the trunking” doesn’t cut it. “I measured, cut, and secured the trunking to the specification, ensuring 300mm spacing between fixings” demonstrates your involvement. 

Current evidence means recent and relevant to modern standards. Work from five years ago may not reflect current BS 7671 requirements or your current competence level. 

Sufficient evidence means enough instances to prove consistency. One example of crimping a cable isn’t sufficient. Multiple examples across different cable types and situations demonstrate competence. 

Evidence types assessors accept: 

Photographic evidence: Process stages with context, not just finished work. “Before, during, after” sequences showing your involvement and technical decisions. 

Job documentation: Risk Assessments and Method Statements (RAMS), Work Programmes, Electrical Installation Certificates (EICs), Minor Works Certificates (MWCs), test results from installations you’ve completed. 

Witness testimonies: Signed statements from technically competent supervisors (qualified electricians, not general site managers) confirming you performed specific tasks to the required standard. 

Professional discussions: Recorded conversations with your assessor where you explain technical decisions, safety considerations, and problem-solving approaches. These verify understanding beyond just doing the task. 

Product evidence: Work logs, delivery notes you’ve checked, materials you’ve specified, proving you understand the planning and preparation aspects. 

Why NVQ Portfolios Take 6-18 Months (Even for Experienced Electricians) 

Let’s be honest about timelines because unrealistic expectations create frustration. 

Repeatability requirements: A single instance of a task rarely satisfies assessors. They need to see consistent performance over time. Installing one distribution board doesn’t prove competence. Installing several across different settings (domestic, commercial, varying load requirements) demonstrates reliability. 

Scope of work needed: You must encounter variety in systems. Different cable types (PVC/PVC, SWA, FP200, singles, data), different containment methods (PVC conduit, metal conduit, trunking, cable tray), and different equipment (consumer units, distribution boards, isolators, MCBs, luminaires). A single job type limits evidence breadth. 

Verification process timing: Every piece of evidence must be checked, mapped to performance criteria, and often sent back for clarification. This creates a natural cycle of submission, feedback, revision, and resubmission. Internal verification (your centre checking work) and external verification (awarding body sampling) add time. 

Site access variability: You might spend three months on domestic installations with limited equipment variety, then move to a commercial project exposing you to systems you’ve been missing. The portfolio progresses in steps, not linear advancement. 

Even electricians with 10+ years experience need 9-12 months minimum because prior jobs may lack documentation, breadth across unit requirements, or verifiable proof meeting current standards. Time served doesn’t automatically translate to portfolio-ready evidence. 

Why Portfolios Stall or Get Rejected 

Understanding common failure points helps you avoid them: 

Weak evidence lacking context: Uploading 50 photos of a finished house without showing intermediate stages (first fix cable routing, earthing arrangements before burial, testing sequences) gets rejected. Assessors can’t verify what they can’t see in process. 

Gaps in unit coverage: Strong evidence for installation and termination but minimal fault-finding exposure stalls portfolios at 80% completion. Missing testing variety (only domestic EICs, no commercial schedules) creates gaps. 

Insufficient fault-finding opportunities: Many portfolios stall because learners haven’t encountered or documented enough fault scenarios. Three examples of different fault types are required, and not everyone gets regular fault-finding exposure. 

Misunderstanding assessor expectations: Thinking “enough photos means enough evidence” without mapping them to performance criteria. Photos require narrative explaining what you’re doing, why you’re doing it, and how it meets standards. 

Over-reliance on single jobs: Documenting one large project thoroughly but lacking breadth across different systems and situations. Assessors want to see adaptability, not just competence in familiar territory. 

Unsigned or inadequate witness testimonies: Retrospective evidence collection when jobs are complete makes securing proper witness statements impossible. Supervisors have moved on, details are forgotten, or they’re unwilling to sign months after the work. 

The “photo dump” problem: Submitting images without explanation. A photo of a glanded SWA cable doesn’t prove you glanded it correctly, selected appropriate gland size, or understand IP rating requirements. Photos need supporting narrative. 

Comparison diagram showing good quality NVQ portfolio evidence versus poor quality evidence examples
Quality evidence shows process and context, not just finished work

Common Misunderstandings That Slow People Down

Let’s clear up the myths that create delays: 

“More photos equals faster pass”: Quantity doesn’t equal quality. One photo of a correctly glanded SWA cable with a written explanation of gland selection, IP rating requirements, and installation process is worth ten photos of closed consumer units with no context. 

“My boss said I’m good, so I should pass”: Employer opinion isn’t regulated evidence. Only performance mapped to specific criteria counts toward the NVQ. Your supervisor’s witness testimony carries weight when it confirms you performed specific tasks to specific standards, not when it’s a general character reference. 

“The NVQ is just a paperwork exercise”: The NVQ is the legal bridge to being a “Qualified Electrician” in the UK. It’s a regulatory requirement for JIB Gold Card status and demonstrates occupational competence meeting National Occupational Standards, not an administrative hurdle. 

“I can do the portfolio in a month because I’m experienced”: The 2357 framework requires evidence of competence over time across varied situations. A “crash course” portfolio lacks the required “Current” and “Sufficient” elements assessors look for. Rushing creates gaps that extend timelines when assessors request more evidence. 

“Experience alone should be sufficient”: Verifiable evidence, not just time served, is required. Twenty years working doesn’t automatically mean you can prove competence meeting current standards with proper documentation. 

“AM2 proves everything, the NVQ is secondary”: AM2 confirms NVQ-evidenced competence in controlled conditions. Both are essential. AM2 without the NVQ portfolio doesn’t lead to full qualification. The portfolio proves you can do the job under real site pressures; AM2 proves you can do it under assessment conditions. 

For those wondering about the broader qualification pathway and where the NVQ fits, our guide on how to become an electrician in the UK explains the complete journey from initial training through to Gold Card status. 

OneFile digital portfolio platform showing NVQ unit structure and evidence tracking
OneFile tracks your evidence against each unit's performance criteria, showing progress and gaps in real-time

Getting Started: Before You Upload a Single Photo

Right, now you understand what you’re building, let’s talk about the practical setup. 

Introduction to the NVQ 2357 Portfolio 

This part of your journey builds on all the theory you’ve learned from your Level 2 & Level 3 Diplomas plus the 18th Edition. You’ll need to complete a Skill Scan to confirm your qualifications are suitable for the NVQ 2357 route (basically, if you’ve got less than three years’ post-qualification experience, this is the route for you rather than the experienced worker assessment). 

The Skill Scan maps your existing knowledge and identifies any gaps before you start gathering evidence. It’s not a test you can fail, but it determines your starting point and helps your assessor understand your background. 

Proof of Prerequisites 

Before your assessor can sign off any portfolio work, they need verified copies of: 

Level 2 Diploma in Electrical Installations (2365-02): Proves your foundational knowledge of electrical principles, safe working practices, and basic installation techniques. 

Level 3 Diploma in Electrical Installations (2365-03): Demonstrates your understanding of inspection, testing, fault diagnosis, and design principles. 

18th Edition BS 7671:2018+A2:2022: Confirms you understand current wiring regulations. Note that if you completed 18th Edition before Amendment 2 (2022), you may need to update this qualification depending on your centre’s requirements. 

Don’t have these yet? You can’t start the NVQ portfolio without them. They’re non-negotiable prerequisites because the NVQ assesses your ability to apply this knowledge in practice. 

OneFile: Your Digital Portfolio Platform 

The online platform we use is called OneFile. Think of it as your digital portfolio where everything lives: photos, documents, assessor feedback, and unit progress tracking. 

Key features: 

Evidence upload: You can upload directly from your phone on site (highly recommended) or add files later from a computer. Photos, PDFs of certificates, scanned RAMS, test sheets all go into your evidence library. 

Unit mapping: When you upload evidence, you tag it to specific units and performance criteria. OneFile shows which criteria you’ve covered and which remain outstanding. 

Assessor communication: Your assessor leaves feedback, requests clarification, or signs off evidence directly in the platform. You receive notifications when action is needed. 

Progress tracking: Visual indicators show completion percentage per unit, overall portfolio progress, and upcoming assessments (like your face-to-face H&S observations). 

The important bit: Upload evidence as you complete jobs, not retrospectively. Trying to reconstruct evidence months after the work creates gaps, missing details, and delays when you can’t remember specifics or can’t contact witnesses. 

Overview of the Seven Practical Units 

Here’s what you’re working towards: 

Unit 311 (Health & Safety): Two face-to-face site assessments minimum three months apart, demonstrating safe working practices, appropriate PPE, and risk assessment application. 

Unit 312 (Environmental & Technologies): Written project covering hazardous materials regulations and low-carbon technologies (solar PV, heat pumps, EV charging, etc.). 

Unit 313 (Overseeing Work): Evidence of planning, coordinating with other trades, and ensuring job completion to specification and deadline. 

Unit 315 (Planning, Preparing & Installing): The comprehensive unit covering cable types, containment systems, and equipment installation across varied jobs. 

Unit 316 (Terminations & Connections): Demonstrating competent termination techniques (screwed, crimped, soldered, compression) across different equipment. 

Unit 317 (Inspection & Testing): Electrical Installation Certificates, Minor Works Certificates, and safe isolation procedures proving testing competence. 

Unit 318 (Fault Finding): Evidence of diagnosing and rectifying different fault types using appropriate test equipment and logical methodology. 

The units overlap naturally. A single job often provides evidence for multiple units simultaneously, which is why systematic documentation matters more than trying to complete units sequentially.

The Units with Practical Examples: What Assessors Actually Want to See

Now we get into the detail. For each unit, I’ll show you what it assesses, what evidence you need, a real-world example of a job that provides good evidence, and common pitfalls that slow people down. 

Unit 311: Health & Safety (The Face-to-Face One) 

What This Unit Assesses: 

Your ability to identify hazards, implement risk controls, work safely at height, use appropriate PPE, and demonstrate safe working behaviour under observation. This unit confirms you don’t just know the theory but actually apply it on site under pressure. 

Evidence Requirements: 

  • Two face-to-face site assessments minimum three months apart (no shortcuts here) 
  • Risk Assessment and Method Statement (RAMS) before each assessment 
  • Work Programme showing planned activities and timing 
  • Working at height using access equipment (stepladders, ladders, platform, MEWP, or scaffolding) 
  • Appropriate PPE as per your RAMS 
  • Answers to assessor questioning about the task and general H&S 

Real-World Example: 

Scenario: You’re installing LED downlights in a commercial office ceiling void. Your first H&S assessment is during first-fix cable installation, second assessment is during second-fix and testing. 

First Assessment (Month 1): 

  • Your RAMS covers working at height on stepladders, isolation of existing lighting circuits, and manual handling of cable drums 
  • Assessor observes you checking stepladder condition before use, maintaining three points of contact, and positioning ladder on stable ground 
  • You demonstrate safe isolation procedure before accessing ceiling void 
  • You explain cable routing decisions considering fire barriers and building structure 
  • Assessor asks about emergency procedures if someone is injured at height 

What this provides: Evidence of planning (RAMS), safe working at height, appropriate PPE (hard hat, high-vis, safety boots), and understanding of electrical and non-electrical hazards. 

Second Assessment (Month 4, minimum 3 months later): 

  • Different RAMS covering different risks (working above occupied offices, managing public access, testing live installations) 
  • Assessor observes second-fix installation and testing procedures 
  • You demonstrate evolution of your H&S awareness (referencing lessons from first assessment) 
  • Questions focus on how you adapted to changing site conditions 

What this provides: Evidence of consistent safe behaviour over time, not just a one-off demonstration. 

Common Pitfalls: 

“Can I do both assessments on the same day?” No. The three-month gap proves consistent behaviour, not just performing well under observation once. 

“My RAMS is a template from the internet.” Assessors want site-specific RAMS reflecting actual hazards for your specific job. Generic templates get questioned. 

“I forgot to update my Work Programme when the job changed.” Document changes when they happen. Assessors understand jobs change but need to see you managed those changes safely. 

What Assessors Look For: 

  • Genuine hazard awareness, not just going through motions 
  • Appropriate responses when situations change (someone enters your work area unexpectedly) 
  • Correct PPE for actual hazards, not just wearing everything you own 
  • Calm, competent behaviour demonstrating this is how you normally work, not a special performance 
Electrician wearing appropriate PPE demonstrating safe working practices on construction site
Correct PPE selection based on site-specific risk assessment, not just wearing everything available
Electrician performing safe isolation procedure with voltage tester and lock-off device
Safe isolation procedure demonstrated in stages: prove dead, test, prove tester still works
Site safety barriers and warning signage around electrical work area
Controlled work areas with appropriate signage prevent unauthorised access during electrical work

Unit 312: Environmental & Technologies (The Written One)

What This Unit Assesses: 

Your understanding of environmental legislation affecting electrical work and your knowledge of low-carbon technologies. This proves you understand the wider impact of electrical installations beyond just making circuits work. 

Evidence Requirements: 

  • Written project covering hazardous materials and waste disposal from jobs you’ve worked on 
  • Legislative coverage including Environmental Protection Act, Hazardous Waste Regulations, Control of Pollution Act, Control of Noise at Work Regulations, Packaging Regulations, WEEE Regulations 
  • Information on technologies including solar PV, wind energy, micro hydro, heat pumps, grey water recycling, rainwater harvesting, biomass, solar thermal, and Combined Heat & Power 
  • Pictures and advantages for each technology listed 

Real-World Example: 

Scenario: You’ve worked on a house rewire that included solar PV installation and disposal of old fluorescent lighting containing mercury. 

Your write-up covers: 

Hazardous Materials Section: 

  • “During the rewire at 24 Oak Street, we removed 18 T8 fluorescent tubes containing mercury vapour from the kitchen and utility room. Under the Hazardous Waste Regulations 2005, these cannot be disposed of in general waste.” 
  • “We segregated the tubes into a dedicated container supplied by our WEEE-registered disposal contractor (registration number: WEE/XXXXXX) and completed a hazardous waste consignment note.” 
  • “The old consumer unit contained asbestos flash guards. We followed the Control of Asbestos Regulations 2012, notified the HSE, and engaged a licensed contractor for removal. Work stopped in that area until safe removal was confirmed.” 

Environmental Technologies Section: 

  • Include photo of the solar PV installation you worked on 
  • Explain advantages: “Reduces grid electricity consumption by generating up to 4kW during peak sun hours, reducing the property’s carbon footprint by approximately 1.5 tonnes CO2 annually. Feed-in tariff payments (though ending for new installations) previously made renewable generation economically attractive. Current advantage is reducing energy bills and increasing property value.” 

For technologies you haven’t directly installed, research and present: 

  • Heat pumps: “Coefficient of Performance (COP) of 3-4 means for every 1kW of electricity consumed, 3-4kW of heat is produced, making them more efficient than direct electric heating. Reduces reliance on gas heating, supporting net-zero carbon targets.” 

Common Pitfalls: 

“I just copied information from manufacturer websites.” Assessors can spot this. Reference specific jobs, use your own words, explain how you’ve seen the technology used in practice. 

“I only covered technologies I’ve installed.” You need to cover all the listed technologies. For ones you haven’t directly worked on, research and explain them with supporting images from manufacturers or case studies. 

“I left this until the last minute.” This unit takes time. It’s a proper research project, not a quick form-filling exercise. Start early, build it gradually. 

What Assessors Look For: 

  • Evidence you understand legal responsibilities for waste disposal 
  • Ability to explain why low-carbon technologies matter beyond just “they’re good for environment” 
  • Practical understanding of technology advantages and limitations 
  • Proper referencing of regulations (not just mentioning names but explaining how they apply to your work) 
Installed LED lighting system demonstrating energy-efficient electrical installation
LED lighting and smart controls reduce energy consumption while meeting BS 7671 requirements
Installed EV charging point demonstrating low-carbon electrical technology
EV charging infrastructure installation requires understanding of dedicated circuits, RCD protection, and DNO notification
Manufacturer technical documentation for renewable energy electrical system
Understanding manufacturer specifications ensures compliant installation of low-carbon technologies

Unit 313: Overseeing Work

What This Unit Assesses: 

Your ability to plan electrical work, coordinate with other trades, manage resources, and ensure job completion to specification and deadline. This isn’t about doing the work yourself but demonstrating supervisory and planning competence. 

Evidence Requirements: 

  • Work Programme showing liaison with other tradespeople 
  • Risk Assessment and Method Statement for work you’re overseeing 
  • Information on tools and equipment used and why you selected them 
  • Delivery notes showing you checked materials for correct quantities and condition 
  • Evidence of coordination with other trades (plumbers, builders, decorators) 
  • Professional discussion with assessor about planning decisions 

Real-World Example: 

Scenario: You’re the lead electrician on a bathroom renovation requiring coordination with plumbers, tilers, and decorators. 

Your Work Programme shows: 

  • Week 1: First fix electrical (before plumber installs shower, before tiler starts) 
  • “Coordinated with plumber John Smith to ensure shower pump location doesn’t clash with cable routing for extractor fan. Agreed pump position allows 50mm clearance from cables to meet Building Regulations Part P separation requirements.” 
  • Week 2: Plumber and tiler working (electrical work paused) 
  • Week 3: Second fix after tiling complete 
  • “Waited for grouting to cure fully before drilling for accessory mounting to avoid cracking tiles. Confirmed with tiler (ABC Tiling Ltd) that 48-hour cure time sufficient for ceramic tiles used.” 

Your RAMS covers: 

  • Risks from working in confined space (small bathroom) 
  • Coordination with other trades (dust from tiling affecting electrical equipment) 
  • Protection of installed cables during tiling work 

Delivery note evidence: 

  • Checked delivery of 10mm² shower cable: “Verified 15 meters delivered against 15 meters ordered. Inspected cable drum for damage during transport. Checked manufacturer’s certification included showing BS 6004 compliance. No damage found, certification present, accepted delivery.” 

Tool selection explanation: 

  • “Selected 16mm SDS drill for mounting metal back boxes in brick wall. Standard masonry bit insufficient for required depth in solid wall construction. Confirmed with builder that wall is solid brick, not cavity, so 35mm back box depth achievable.” 

Common Pitfalls: 

“I just wrote ‘coordinated with plumber’ without details.” Assessors want specifics. What did you coordinate? When? What was agreed? What would have gone wrong without coordination? 

“My Work Programme is vague dates.” “Week 1” is less useful than “Monday 14th – Wednesday 16th March: First fix electrical. Dependency: Must complete before plumber installs shower base (Thursday 17th March).” 

“I don’t have delivery notes.” Start keeping them now. Every material delivery should have a note you’ve checked and signed. 

What Assessors Look For: 

  • Evidence you’re thinking ahead, not just reacting to problems 
  • Realistic planning accounting for other trades’ schedules 
  • Professional communication with other trades (not just “we worked together”) 
  • Understanding that your decisions affect other trades and vice versa 
Electrician in supervisory role overseeing and checking another operative's electrical work
Overseeing work means checking quality, providing guidance, and ensuring compliance with specifications
Electrician checking and verifying completed electrical installation work
Verification of completed work ensures it meets specifications before handover to client
Electrician reviewing electrical installation drawings and plans on construction site
Job planning requires understanding drawings, specifications, and coordination with site programme

Unit 315: Planning, Preparing & Installing (The Big One)

What This Unit Assesses: 

Your core installation competence across cable types, containment systems, and equipment. This is the comprehensive unit proving you can actually do the physical electrical work to professional standards. 

Evidence Requirements: 

Four different cable types: 

  • PVC/PVC cable (Twin & Earth) 
  • SWA cable 
  • FP200 cable (fire-resistant) 
  • Single insulation cables 
  • Flexible cables 
  • SY cable 
  • Data cable (Cat 5e, Cat 6) 

Four different containment types: 

  • PVC conduit 
  • Metal conduit 
  • PVC trunking 
  • Metal trunking 
  • Cable tray 
  • Ladder systems 
  • Ducting 
  • Busbar systems 
  • Modular wiring systems 

Five different equipment types: 

  • Isolators 
  • Socket outlets 
  • Distribution boards 
  • Consumer units 
  • Luminaires 
  • MCBs 
  • Earth terminals 
  • Control panels 
  • Electric motors and control equipment 
  • Heating systems 
  • Data sockets 

Real-World Example: 

Scenario: Domestic house rewire over three weeks providing multiple evidence opportunities. 

Week 1 – First Fix: 

Cable types covered: 

  • PVC/PVC (T&E) for ring finals and lighting circuits
  • “Installed 2.5mm² T&E for upstairs ring final following planned route through ceiling joists. Drilled joists at centre-line minimum 50mm from top/bottom edges to prevent weakening and allow for nail/screw avoidance zones. Installed grommets in all drilled holes to prevent cable sheath damage.” 
  • SWA for garage supply
  • “Installed 6mm² 3-core SWA from house consumer unit to garage. Cable buried 600mm deep in garden to meet BS 7671 requirements for buried cables. Installed warning tape 150mm above cable. Used appropriate glanding kit with IP-rated gland, connected SWA armour to earth bar.” 

Containment covered: 

  • PVC trunking in garage
  • “Installed 50mm x 50mm PVC trunking in garage for surface-mounted socket circuit. Trunking fixed at 400mm centres using appropriate fixings for blockwork wall. Ensured lid clips fully engaged for IP protection.” 

Equipment covered: 

  • Consumer unit replacement
  • “Installed Hager 12-way dual-RCD consumer unit replacing old rewireable fuseboard. Ensured adequate working space for future maintenance. Main switch rated 100A matching DNO cutout fuse. All circuits protected by appropriate RCDs meeting 18th Edition requirements.” 
  • Socket outlets
  • “Installed 20x 13A double sockets throughout house. Used metal back boxes in solid walls, dry-lining boxes in stud walls. Ensured correct polarity, earth continuity, and secure terminations.” 

Week 2 – Continued Installation: 

More cables: 

  • FP200 for fire alarm system 
  • “Installed FP200 cable for fire alarm interconnect between smoke detectors. Fire-resistant cable maintains circuit integrity during fire, ensuring alarm system continues operating. Installed to manufacturer’s minimum bending radius specifications.” 
  • Data cable 
  • “Installed Cat 6 data cable to home office and living room for client’s network requirements. Maintained separation from mains cables per BS 7671 to prevent interference. Tested cable using network tester confirming all pairs correctly terminated.” 

More containment: 

  • Metal trunking in utility room
  • “Installed galvanised steel trunking for cooker circuit and washing machine circuit in utility. Metal containment selected for mechanical protection in high-traffic area.” 

Week 3 – Second Fix and Completion: 

Remaining equipment: 

  • Luminaires 
  • “Installed 12x LED downlights in kitchen and bathroom. Ensured appropriate IP rating (IP65 bathroom zones). Used correct transformer/driver ratings. Connected to lighting circuit via junction boxes accessible above ceiling.” 
  • Isolators 
  • “Installed isolator adjacent to boiler for heating system isolation. Ensured accessible location for emergency shutdown without accessing boiler cupboard.” 

What this provides: Evidence across all required categories from a single job well-documented with photos, written explanations, and test results. 

Common Pitfalls: 

“I’ve installed hundreds of sockets, one photo is enough.” Assessors want to see variety. Different situations (surface mount, flush, different wall types), different decisions (back box depth selection, cable entry methods), proving competence across scenarios. 

“I forgot to photograph first-fix.” Once walls are plastered, you can’t prove what’s behind them. Document as you go, especially work that gets covered. 

“My cable routing looked messy so I didn’t photograph it.” Assessors want to see real work, including problem-solving when routes aren’t ideal. Neat for the sake of photos versus realistic installations managing obstacles is obvious. 

What Assessors Look For: 

  • Appropriate cable selection for environment (voltage drop calculations, ambient temperature considerations) 
  • Containment securing at correct intervals (they know the standards) 
  • Equipment selection matching load requirements and client needs 
  • Evidence you made technical decisions, not just followed instructions 
First fix electrical installation showing cable routing and containment in progress
First fix documentation proves competence in cable selection, routing, and installation before work is concealed
Second fix electrical installation showing equipment termination in progress
Mid-stage installation evidence shows decision-making and technical competence during the process
Completed electrical installation ready for inspection and testing
Completed installation before testing demonstrates workmanship quality and compliance with specifications

Unit 316: Terminations & Connections

What This Unit Assesses: 

Your ability to make safe, compliant electrical connections using different termination methods. This proves you understand conductor preparation, terminal selection, and connection integrity. 

Evidence Requirements: 

  • Four types of equipment from Unit 315 list (showing connections, not just installation) 
  • Three connection types:
  • Screwed terminals 
  • Crimped connections 
  • Soldered connections 
  • Non-screw compression (Wago connectors) 

Real-World Example: 

Scenario: Distribution board installation in commercial setting providing multiple termination opportunities. 

Equipment 1 – Distribution Board: 

Screwed connections: 

  • “Terminated incoming 25mm² tails into distribution board main switch. Stripped cable to appropriate length using cable stripping tool to avoid conductor damage. Inserted conductors fully into terminals ensuring no exposed copper visible outside terminal. Tightened terminal screws to manufacturer’s torque specification (2.5Nm) using calibrated torque screwdriver. Checked mechanical security by gentle tug test.” 

Crimped connections: 

  • “Fitted ferrule crimps to 1.5mm² control cables before inserting into spring-loaded terminals. Selected correct ferrule size for conductor. Used appropriate crimping tool (not pliers) ensuring full compression. Visual inspection confirmed crimp integrity before insertion.” 

Equipment 2 – Consumer Unit: 

Screwed connections continued: 

  • “Terminated outgoing circuits into MCBs. Ensured correct polarity (line to line terminal, neutral to neutral bar, protective conductor to earth bar). Stripped insulation precisely to terminal depth to prevent exposed conductors. Tightened each MCB terminal screw, checking for secure mechanical connection.” 

Equipment 3 – Junction Boxes: 

Non-screw compression (Wago): 

  • “Used Wago 221 series connectors for junction box connections in ceiling void. Selected appropriate connector size for conductor count and current capacity. Stripped conductors to gauge marks on connector. Inserted conductors fully and engaged lever mechanism. Visually verified conductor visible in inspection window confirming full insertion.” 

Equipment 4 – Data Sockets: 

Soldered connections (if applicable to your work, otherwise substitute): 

  • “Soldered connections for telephone extension using lead-free solder. Pre-tinned conductors before insertion into terminals. Applied heat from soldering iron, allowed solder to flow naturally without overheating. Inspected joint for cold solder appearance (dull, grainy) versus good joint (shiny, smooth). Good joints achieved throughout.” 

Note: If you haven’t used soldering in your electrical work, explain this in professional discussion with assessor and provide alternative evidence. Many modern electrical installations don’t require soldering, using screwed or compression connections instead. 

Common Pitfalls: 

“I just photographed the finished board.” Assessors need to see termination quality. Close-up photos showing conductor preparation, no exposed copper, appropriate terminal engagement. 

“All my connections are screwed, I don’t have crimped or Wago.” You need variety. Commercial work often uses crimps or Wagos. Domestic might be predominantly screwed. Seek opportunities for different connection types. 

“My crimps look fine to me.” Use correct tools. Pliers aren’t crimping tools. Assessors can spot poorly formed crimps that might fail under load. 

What Assessors Look For: 

  • Correct conductor preparation (appropriate stripping length, no damaged strands) 
  • Appropriate connection method selection for the application 
  • Use of correct tools (torque screwdrivers for critical connections, proper crimping tools) 
  • No exposed conductors outside terminals 
  • Evidence you understand connection integrity affects safety and reliability 
Distribution board terminations showing proper conductor preparation and connection
Professional terminations ensure no exposed conductors, correct polarity, and secure mechanical connections
Electrical accessory showing correct conductor termination and connection
Accessory terminations demonstrate competent stripping, insertion depth, and terminal security
Close-up of electrical connections showing neat workmanship and circuit labeling
Neat conductor dressing and clear labeling support future maintenance and demonstrate professional standards

Unit 317: Inspection & Testing (The Important One)

What This Unit Assesses: 

Your ability to test electrical installations safely and correctly, interpret results, and complete certification. This unit directly impacts your earning potential because qualified electricians who can sign off their own work command significantly higher rates than those requiring supervision. 

Evidence Requirements: 

  • Safe Isolation Procedure – detailed explanation and demonstration 
  • Two Electrical Installation Certificates (EICs) with completed schedules from jobs you’ve tested under supervision 
  • One Minor Works Certificate (MWC) for circuit alteration or accessory replacement 
  • Witness Testimony from Work Supervisor/Employer confirming you carried out testing under supervision 
  • Handover documentation showing how you explained results to client 

Real-World Example: 

Scenario: New garage conversion with dedicated circuits requiring full testing and certification. 

Safe Isolation Procedure (you’ll explain this in detail): 

“Before any testing, I followed the safe isolation procedure: 

  1. Identified the circuit to be isolated (garage ring final on MCB 14) 
  2. Located and identified the means of isolation (MCB 14 in main consumer unit) 
  3. Proved my voltage indicator working on known live source (proved on different circuit) 
  4. Isolated the circuit (switched off MCB 14, locked off using MCB lock-out device) 
  5. Tested isolated circuit to prove dead using voltage indicator at multiple points (garage sockets, switch positions) 
  6. Proved my voltage indicator still working on known live source (re-tested on different circuit) 
  7. Began testing only after confirming circuit dead at all accessible points” 

Electrical Installation Certificate (EIC) for garage circuits: 

Circuits tested: 

  • 32A ring final circuit for sockets 
  • 6A lighting circuit 

Tests completed and recorded: 

Continuity of protective conductors: 

  • Ring final R1+R2 measured at 0.45Ω (within acceptable limits for circuit length and conductor size) 
  • Lighting circuit R1+R2 measured at 0.28Ω 
  • “Connected line and cpc together at consumer unit, measured at furthest point on each circuit. Results confirm continuous earth path and correct polarity.” 

Insulation resistance: 

  • Ring final: 200MΩ between line-neutral, 150MΩ between line-earth, 180MΩ between neutral-earth (all exceeding minimum 1MΩ requirement) 
  • Lighting circuit: 220MΩ line-neutral, 170MΩ line-earth, 190MΩ neutral-earth 
  • “Tests conducted at 500V DC test voltage for 230V circuits per BS 7671. All results satisfactory.” 

Polarity: 

  • Verified at all socket outlets and light fittings 
  • “Confirmed line to line terminal, neutral to neutral, earth to earth throughout. No polarity reversals found.” 

Earth fault loop impedance (Zs): 

  • Ring final: 0.62Ω (within maximum Zs for 30mA RCD protection) 
  • Lighting circuit: 0.58Ω 
  • “Measured using calibrated earth loop impedance tester. Results confirm disconnection times within required limits for 30mA RCD protection.” 

RCD testing: 

  • 30mA RCD protecting garage circuits tested at 1x, 5x rated current 
  • Trip time at 1x (30mA): 28ms 
  • Trip time at 5x (150mA): 18ms 
  • “Both within maximum 300ms (1x) and 40ms (5x) limits per BS 7671. RCD operating correctly.” 

Witness Testimony content: “I confirm that [Your Name] carried out the inspection and testing of the garage electrical installation on [date] under my supervision. All tests were conducted correctly using calibrated test equipment (Megger MFT1741, calibration due [date]). Test results were accurately recorded on the Electrical Installation Certificate and schedule. [Your Name] demonstrated competent understanding of safe isolation procedures and correct testing sequences. 

Signed: [Supervisor Name], [Qualification], [Company]” 

Minor Works Certificate Example: 

Scenario: Replaced damaged socket outlet on existing ring final. 

Work carried out: 

  • “Replaced damaged socket outlet on kitchen ring final. Socket showed signs of overheating due to loose connection. Circuit isolated using safe isolation procedure. Existing connections remade using new socket outlet. Verified supply polarity and earth continuity. Confirmed socket mechanically secure.” 

Tests: 

  • Earth continuity: Confirmed using continuity tester 
  • Insulation resistance: >50MΩ between conductors 
  • Polarity: Correct at socket outlet 
  • Earth fault loop impedance (Zs): 0.68Ω (within limits for 32A MCB with 30mA RCD) 

Handover to client: “Explained to client that damaged socket replaced due to loose connection causing overheating. Advised to avoid overloading sockets with high-current appliances (kettles, toasters) on same outlet. Provided Minor Works Certificate explaining test results confirm safe installation. Answered client questions about RCD testing and purpose of earth connection.” 

Common Pitfalls: 

“I don’t understand what the test results mean.” Assessors will ask you to explain why you recorded specific values, what they indicate, and whether they’re acceptable. If you just copied numbers without understanding, that becomes obvious. 

“My supervisor did the testing, I watched.” Witness testimony must confirm YOU performed testing under supervision, not observed your supervisor testing. 

“I forgot to get my supervisor to sign the witness testimony.” Get signatures while the job is fresh and supervisor is available. Retrospective signatures months later are difficult or impossible. 

“I didn’t keep copies of my EICs.” You need these for your portfolio. Take photos before handing to client, or use carbonless forms providing duplicate copies. 

What Assessors Look For: 

  • Correct testing sequence following BS 7671 guidance 
  • Appropriate test instrument selection and use 
  • Understanding of why each test is performed and what acceptable results look like 
  • Safe isolation procedure genuinely understood, not just memorised 
  • Client communication showing you can explain technical information appropriately 
Electrician performing electrical testing using calibrated multifunction tester
Multifunction testers verify circuit safety through continuity, insulation resistance, and earth loop impedance tests
Electrician testing electrical installation at socket outlet using test equipment
Testing at multiple points throughout installation verifies circuit integrity and safety
Completed Electrical Installation Certificate showing recorded test results
Accurate test result documentation proves competent testing and provides legal record of installation safety

Unit 318: Fault Finding

What This Unit Assesses: 

Your ability to test electrical installations safely and correctly, interpret results, and complete certification. This unit directly impacts your earning potential because qualified electricians who can sign off their own work command significantly higher rates than those requiring supervision. 

Evidence Requirements: 

  • Safe Isolation Procedure – detailed explanation and demonstration 
  • Two Electrical Installation Certificates (EICs) with completed schedules from jobs you’ve tested under supervision 
  • One Minor Works Certificate (MWC) for circuit alteration or accessory replacement 
  • Witness Testimony from Work Supervisor/Employer confirming you carried out testing under supervision 
  • Handover documentation showing how you explained results to client 

Real-World Example: 

Scenario: New garage conversion with dedicated circuits requiring full testing and certification. 

Safe Isolation Procedure (you’ll explain this in detail): 

“Before any testing, I followed the safe isolation procedure: 

  1. Identified the circuit to be isolated (garage ring final on MCB 14) 
  2. Located and identified the means of isolation (MCB 14 in main consumer unit) 
  3. Proved my voltage indicator working on known live source (proved on different circuit) 
  4. Isolated the circuit (switched off MCB 14, locked off using MCB lock-out device) 
  5. Tested isolated circuit to prove dead using voltage indicator at multiple points (garage sockets, switch positions) 
  6. Proved my voltage indicator still working on known live source (re-tested on different circuit) 
  7. Began testing only after confirming circuit dead at all accessible points” 

Electrical Installation Certificate (EIC) for garage circuits: 

Circuits tested: 

  • 32A ring final circuit for sockets 
  • 6A lighting circuit 

Tests completed and recorded: 

Continuity of protective conductors: 

  • Ring final R1+R2 measured at 0.45Ω (within acceptable limits for circuit length and conductor size) 
  • Lighting circuit R1+R2 measured at 0.28Ω 
  • “Connected line and cpc together at consumer unit, measured at furthest point on each circuit. Results confirm continuous earth path and correct polarity.” 

Insulation resistance: 

  • Ring final: 200MΩ between line-neutral, 150MΩ between line-earth, 180MΩ between neutral-earth (all exceeding minimum 1MΩ requirement) 
  • Lighting circuit: 220MΩ line-neutral, 170MΩ line-earth, 190MΩ neutral-earth 
  • “Tests conducted at 500V DC test voltage for 230V circuits per BS 7671. All results satisfactory.” 

Polarity: 

  • Verified at all socket outlets and light fittings 
  • “Confirmed line to line terminal, neutral to neutral, earth to earth throughout. No polarity reversals found.” 

Earth fault loop impedance (Zs): 

  • Ring final: 0.62Ω (within maximum Zs for 30mA RCD protection) 
  • Lighting circuit: 0.58Ω 
  • “Measured using calibrated earth loop impedance tester. Results confirm disconnection times within required limits for 30mA RCD protection.” 

RCD testing: 

  • 30mA RCD protecting garage circuits tested at 1x, 5x rated current 
  • Trip time at 1x (30mA): 28ms 
  • Trip time at 5x (150mA): 18ms 
  • “Both within maximum 300ms (1x) and 40ms (5x) limits per BS 7671. RCD operating correctly.” 

Witness Testimony content: “I confirm that [Your Name] carried out the inspection and testing of the garage electrical installation on [date] under my supervision. All tests were conducted correctly using calibrated test equipment (Megger MFT1741, calibration due [date]). Test results were accurately recorded on the Electrical Installation Certificate and schedule. [Your Name] demonstrated competent understanding of safe isolation procedures and correct testing sequences. 

Signed: [Supervisor Name], [Qualification], [Company]” 

Minor Works Certificate Example: 

Scenario: Replaced damaged socket outlet on existing ring final. 

Work carried out: 

  • “Replaced damaged socket outlet on kitchen ring final. Socket showed signs of overheating due to loose connection. Circuit isolated using safe isolation procedure. Existing connections remade using new socket outlet. Verified supply polarity and earth continuity. Confirmed socket mechanically secure.” 

Tests: 

  • Earth continuity: Confirmed using continuity tester 
  • Insulation resistance: >50MΩ between conductors 
  • Polarity: Correct at socket outlet 
  • Earth fault loop impedance (Zs): 0.68Ω (within limits for 32A MCB with 30mA RCD) 

Handover to client: “Explained to client that damaged socket replaced due to loose connection causing overheating. Advised to avoid overloading sockets with high-current appliances (kettles, toasters) on same outlet. Provided Minor Works Certificate explaining test results confirm safe installation. Answered client questions about RCD testing and purpose of earth connection.” 

Common Pitfalls: 

“I don’t understand what the test results mean.” Assessors will ask you to explain why you recorded specific values, what they indicate, and whether they’re acceptable. If you just copied numbers without understanding, that becomes obvious. 

“My supervisor did the testing, I watched.” Witness testimony must confirm YOU performed testing under supervision, not observed your supervisor testing. 

“I forgot to get my supervisor to sign the witness testimony.” Get signatures while the job is fresh and supervisor is available. Retrospective signatures months later are difficult or impossible. 

“I didn’t keep copies of my EICs.” You need these for your portfolio. Take photos before handing to client, or use carbonless forms providing duplicate copies. 

What Assessors Look For: 

  • Correct testing sequence following BS 7671 guidance 
  • Appropriate test instrument selection and use 
  • Understanding of why each test is performed and what acceptable results look like 
  • Safe isolation procedure genuinely understood, not just memorised 
  • Client communication showing you can explain technical information appropriately 
Electrician performing safe isolation and insulation resistance testing at consumer unit during fault diagnosis
Logical fault finding begins with safe isolation and systematic testing to identify short circuits or insulation faults
Electrician measuring circuit current with clamp meter to diagnose overload condition
Measuring actual load current confirms whether an MCB is tripping due to overload rather than a wiring fault
Electrician measuring circuit current with clamp meter to diagnose overload condition
Measuring actual load current confirms whether an MCB is tripping due to overload rather than a wiring fault
High resistance joints cause heat buildup and voltage drop, requiring secure re-termination and component replacement
High resistance joints cause heat buildup and voltage drop, requiring secure re-termination and component replacement

Common Pitfalls:

“I don’t get many fault-finding opportunities.” Speak with your employer about shadowing experienced electricians on fault-finding jobs. Even if you’re not the lead, witnessing the diagnostic process and documenting it helps. Some centres accept observed fault finding with detailed reflective accounts. 

“I fixed the fault but didn’t document the diagnostic process.” Assessors need to see your logical methodology, not just the end result. Explain your thinking: “I tested X because Y, which ruled out Z, leading me to suspect A.” 

“My fault finding is just ‘changed the damaged cable’.” What led you to identify that cable as faulty? What tests confirmed it? What eliminated other possibilities? The diagnostic process is as important as the fix. 

What Assessors Look For: 

  • Logical, systematic approach to fault diagnosis 
  • Appropriate test equipment selection and use 
  • Understanding of fault symptoms and underlying causes 
  • Client communication (questioning to establish fault history, explaining findings) 
  • Safety awareness (safe isolation before investigation, testing after rectification) 

Documentation & Photographic Evidence: The Practical How-To 

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Now you know what each unit requires, let’s talk about the practical side of documentation and photo evidence that actually gets accepted. 

Summary of Documentation Required 

Here’s your complete checklist. Print this. Stick it somewhere visible. Tick things off as you go. 

For Unit 311 (Health & Safety): 

  • 2 Risk Assessments (one per site observation) 
  • 2 Method Statements (one per site observation) 
  • 2 Work Programmes (one per site observation) 

For Unit 317 (Inspection & Testing): 

  • 2 Electrical Installation Certificates with schedules 
  • 1 Minor Works Certificate 
  • 2 Witness Testimonies (one for each EIC confirming you performed testing) 
  • Additional documentation across all units: 
  • Job specifications/quotations (Unit 313 evidence) 
  • Delivery notes showing material checks (Unit 313, Unit 315) 
  • Site diaries or work logs (useful for all units) 
  • Professional discussion records (assessor completes these with you) 

When to gather each document: 

RAMS and Work Programmes: Create BEFORE starting work. Retrospective RAMS are obvious and assessors question them. 

Delivery notes: Check and sign AT DELIVERY. Once materials are installed, you can’t prove you checked them. 

Witness testimonies: Request DURING or IMMEDIATELY AFTER the work. Months later, supervisors have forgotten details or moved jobs. 

EICs and MWCs: Complete AS YOU TEST. Don’t reconstruct from memory. Record actual measured values, not estimated ones. 

Who signs what and why it matters: 

Witness testimonies: Must be signed by technically competent person (qualified electrician, not general supervisor). They’re confirming you performed work to required standard, not just that you were present on site. 

RAMS: You can create these, but site supervisor or manager should review and approve, especially for higher-risk activities. 

EICs: You complete and sign as the person who performed testing. Your supervising electrician countersigns confirming work supervised appropriately. 

Don’t forge signatures or get inappropriate people to sign. Assessors verify these, and fraudulent documentation is grounds for disqualification. 

Mastering Photographic Evidence 

The “before, during, after” principle is your foundation, but let’s expand on what makes photos actually evidential. 

What makes a photo evidential: 

Context: Shows the environment, not just close-ups. Where is this installation? What type of property? What challenges did the environment present? 

Process: Shows work in progress, not finished product. Assessors need to see you made decisions and performed work, not just that work was completed. 

Technical detail: Shows the specifics assessors look for. Cable entry methods, gland types, terminal connections, test equipment readings. 

Your involvement: Where possible, shows your hands performing the task or your test equipment connected. Proves you did the work. 

Clarity: Sharp focus, good lighting, appropriate angle. Blurry photos of dark corners aren’t evidential. 

Example 1: TV Point Termination (Expanded from Original)

Completed TV point faceplate installed after correct coaxial cable termination
Proper preparation of the braided screen and inner conductor ensures reliable signal connection and compliant installation

Example 2: SWA Cable Glanding (NEW)

SWA cable glanded and terminated into garage distribution board showing armour bonding and compliant connection
Correct SWA glanding ensures mechanical retention, earth continuity via banjo connection, and weatherproof IP-rated entry into the distribution board

Example 3: Testing and Verification Sequence (NEW)

Electrical testing sequence showing multifunction tester use and completed installation certificate with recorded results
Structured testing from safe isolation through insulation resistance and Zs measurement ensures compliant verification and documented evidence of installation safety

Common photo mistakes:

Too dark: Ceiling voids and cupboards are dark. Use phone torch or work light to illuminate what you’re photographing. 

Wrong angle: Photo of distribution board front doesn’t show terminations. Photo from side showing wiring might be needed. 

No scale: Close-up of cable doesn’t show whether it’s 1.5mm² or 10mm². Include something for scale reference when relevant. 

After-the-fact reconstruction: Photos taken after plastering doesn’t prove what you did during first-fix. Document as you go. 

TV point back box with coaxial cable before termination and faceplate installation
Before: Back box mounted, cable prepared, ready for termination
Coaxial cable being stripped showing braided screen and inner conductor preparation
During: Cable stripped to expose braided screen for earthing and inner conductor for signal connection
Completed TV point installation with faceplate securely mounted
After: Terminated connections secured, faceplate mounted, installation tested and functional
SWA cable end showing outer sheath and armour wires before glanding
Before: SWA cable prepared for glanding, armour wires visible, gland components ready
SWA cable glanding in progress showing armour wires fed through gland body
During: Gland body positioned, armour wires fed through for earth connection, compression ring prepared
Completed SWA cable gland showing secure installation and internal connections
After: Gland fully tightened, armour earthed, IP rating maintained, cable mechanically secure

Why Portfolios Stall or Get Rejected: The Reality Check

Let’s be honest about what actually causes delays and rejections, based on what assessors report: 

Weak evidence lacking context: 

The most common rejection reason. Uploading 50 photos of a finished house doesn’t prove competence. Assessors need to see: 

  • First fix cable routing before walls closed 
  • Earthing arrangements before burial 
  • Testing sequences showing readings on test equipment 
  • Your involvement in the work (not just site photos) 

Example of weak evidence: Photo of closed consumer unit, caption “Installed consumer unit.” 

Example of strong evidence: Three photos (board open showing terminations, testing in progress with visible readings, completed installation labeled) with narrative: “Installed 12-way dual-RCD consumer unit replacing old rewireable board. Terminated incoming supply and 8 outgoing circuits. Tested each circuit (results on EIC schedule reference ECSC/2024/087). Labeled all circuits. Customer advised on RCD testing procedure.” 

Gaps in unit coverage: 

Strong evidence for Units 315 and 316 (installation and terminations) but minimal Unit 318 (fault finding) stalls portfolios at 80% completion. The solution isn’t fabricating fault-finding evidence but being patient while opportunities arise. 

If you’re not encountering faults regularly: 

  • Request to shadow experienced electricians on fault calls 
  • Document observed faults with reflective accounts explaining what you learned 
  • Discuss with your assessor whether observed fault finding with detailed reflection meets requirements 
  • Consider moving to a role with more maintenance/fault-finding exposure if possible 

Missing testing variety: 

Two EICs from similar domestic installations don’t demonstrate breadth. Assessors want variety: 

  • Different installation types (domestic, commercial) 
  • Different circuit types (lighting, power, three-phase if applicable) 
  • Different testing scenarios (new installation, alteration, periodic inspection) 

Unsigned or inadequate witness testimonies: 

“This is to confirm [Name] worked on electrical installation” isn’t sufficient. 

Required witness testimony elements: 

  • What specific work was performed 
  • That YOU performed it (not just observed or assisted) 
  • That work was to required standard 
  • Signature, date, qualification/position of witness 
  • Company name and contact details 

Get witness testimonies signed DURING the job or IMMEDIATELY after completion, not months later. 

Over-reliance on single jobs: 

Documenting one large house rewire thoroughly provides great evidence for Units 315, 316, possibly 317, but might not cover: 

  • Commercial installation requirements 
  • Different containment systems 
  • Equipment variety 
  • Fault-finding opportunities 

Diversify your evidence sources. Multiple smaller jobs across different sectors builds stronger portfolio than single large project. 

Realistic Timelines: Managing Expectations 

Let’s talk honestly about how long this takes: 

Minimum timeline: 6-9 months 

  • Requires regular varied site work 
  • Consistent evidence documentation as you go 
  • Quick assessor feedback turnaround 
  • No significant gaps in required evidence 
  • Realistic for apprentices with structured workplace training 

Average timeline: 12-15 months 

  • More typical for most learners 
  • Accounts for gaps in evidence (waiting for different job types) 
  • Time for assessor feedback and evidence revision 
  • Scheduling two H&S observations 3+ months apart 
  • Realistic for improvers and adult learners with regular site work 

Extended timeline: 18-24 months 

  • Limited site diversity or hours 
  • Slow evidence compilation 
  • Changing jobs mid-portfolio 
  • Part-time work or inconsistent site access 
  • Realistic for career changers without guaranteed placements 

Why rushing creates problems: 

Insufficient breadth: Cramming evidence gathering into 3 months means limited job variety, missing required systems/equipment types. 

Questionable evidence authenticity: Suddenly producing 200 photos from “recent” work that all look identical in lighting/conditions raises red flags. 

Missing witness testimonies: Retrospective evidence collection when jobs are long finished makes securing proper testimonies difficult or impossible. 

Assessor workload: Submitting everything at once creates bottleneck. Assessors need time to review, provide feedback, verify evidence. Steady submission enables steady progress. 

How to accelerate without cutting corners: 

Upload evidence immediately after each job: Don’t wait weeks. Upload photos and documents same day or next day while details are fresh. 

Seek diverse work opportunities: Volunteer for different job types even if outside comfort zone. Commercial job when you’re used to domestic? That’s portfolio gold. 

Communicate with assessor regularly: Monthly check-ins identify gaps early. “I’m short on fault-finding evidence” allows assessor to suggest solutions before you’re 95% complete and stuck. 

Maintain organised evidence library: Tag photos clearly (job reference, unit, date). Finding specific evidence months later is easier with good organisation. 

Plan H&S observations early: Schedule first observation as soon as eligible, allowing 3+ months before second. Don’t wait until other units nearly complete. 

AM2 & Beyond: Completing Your Qualification 

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You’re nearly there. You’ve completed the seven practical units, documented everything properly, and received assessor sign-off. What’s next? 

Unit 399: AM2 Assessment (The Final Boss) 

When you’ve completed the seven practical units, we’ll assist you to apply to one of the approved AM2 Centres for your assessment. (This is an additional cost outside the NVQ package, just so you know.) 

What AM2 actually tests: 

AM2 (Achievement Measurement 2) is an independent practical assessment in a controlled workshop environment. While your NVQ portfolio proves you can do the work on real sites under real pressures, AM2 proves you can demonstrate core competence under timed assessment conditions. 

The assessment typically includes: 

Practical installation task: Installing circuits to specification within time limit (usually 5.5 hours). This might include lighting circuits, socket circuits, and isolation/switching arrangements. 

Testing and inspection: Completing tests and recording results on schedules. Proving competence in safe isolation, continuity, insulation resistance, polarity, earth loop impedance. 

Fault finding: Identifying and rectifying faults in a prepared test rig within time constraints. 

Termination quality: Assessors inspect your connections, conductor preparation, terminal tightening, labeling. 

Compliance: Work must meet BS 7671 requirements. Non-compliances result in fails or required corrections. 

How your NVQ portfolio prepares you: 

By completing the portfolio, you’ve already demonstrated all the skills AM2 tests. The difference is doing them under timed, observed conditions versus your normal work pace. 

Portfolio evidence that directly supports AM2: 

  • Multiple installation examples (Unit 315) mean you’re familiar with cable types, containment, equipment 
  • Termination practice (Unit 316) ensures your connections meet standards under time pressure 
  • Testing experience (Unit 317) means you know testing sequences and can interpret results quickly 
  • Fault-finding exposure (Unit 318) develops logical diagnostic methodology needed for AM2 fault section 

Application process: 

Visit www.netservices.co.uk for approved AM2 centres and booking information. 

Required before booking AM2: 

  • Completed NVQ portfolio (all seven practical units signed off by assessor) 
  • Level 3 Diploma certificate 
  • 18th Edition certificate 
  • Proof of site experience hours (typically 750-1000 hours documented) 

Costs: AM2 assessment costs approximately £400-£600 depending on centre and location (separate from NVQ fees). 

Preparation: 

  • Many centres offer AM2 preparation courses 
  • Practice under timed conditions before assessment 
  • Refresh testing sequences and BS 7671 requirements 
  • Ensure your tool kit is complete and in good condition 

What happens if you don’t pass: 

AM2 has high pass rates (80%+) for properly prepared candidates. If you don’t pass first attempt: 

  • Receive detailed feedback on areas requiring improvement 
  • Can rebook after additional practice 
  • Most centres allow resit bookings 

Common AM2 fail reasons: 

  • Time management (not completing all tasks) 
  • Polarity errors 
  • Inadequate terminations (loose connections, exposed conductors) 
  • Testing sequence errors 
  • Poor workmanship quality 

All of these are avoidable with proper NVQ portfolio preparation and practice. 

AM2 assessment workshop environment showing professional test bays and workstations
AM2 assessments take place in controlled workshop environments with standardised test rigs
AM2 test rig showing distribution boards and circuit installation points
Standardised test rigs ensure consistent assessment conditions for all candidates
AM2 candidate workspace showing tools and equipment prepared for assessment
Proper tool preparation and organisation supports efficient work during timed AM2 assessment

From NVQ to JIB Gold Card

Once you pass AM2, your NVQ portfolio is complete and will be signed off by City & Guilds (or your awarding body). You’ll receive your 2357 NVQ Level 3 Diploma in Installing Electrotechnical Systems and Equipment. 

Timeline after AM2: 

1-2 weeks post-AM2: Results released 2-4 weeks post-results: NVQ certificate issued by awarding body Immediately after receiving NVQ: Apply for JIB ECS Gold Card 

JIB Gold Card application requirements: 

Qualifications needed: 

  • NVQ Level 3 Electrical Installation (2357 or equivalent) 
  • AM2/AM2S/AM2E pass 
  • Level 3 Diploma (2365-03 or equivalent) 
  • 18th Edition BS 7671:2018+A2:2022 

Experience evidence: 

  • Proof of site experience hours (varies by route, typically 1000+ hours) 
  • Employer confirmation of competent electrician status 

Application process: 

  • Complete JIB application via ECS website 
  • Upload qualification certificates 
  • Pay application fee (approximately £36 for 5-year card) 
  • Await verification (typically 2-4 weeks) 

What the Gold Card unlocks: 

Professional recognition: Confirms you’re a qualified, competent electrician meeting industry standards. 

Employment opportunities: Many contractors and clients require Gold Card holders. It’s often a job requirement, not optional. 

Earning potential: Gold Card electricians command significantly higher rates than trainees or improvers. Domestic work: £25-£35/hour employed, £40-£60/hour self-employed. Commercial/industrial: £30-£45/hour employed, £50-£80/hour self-employed. 

JIB grading eligibility: With Gold Card and additional qualifications (2391 Inspection & Testing, 2382-22 18th Edition, 2346 electrical machines), you become eligible for higher JIB grades (Approved Electrician, Technician) with corresponding pay scale increases. 

Insurance: Easier to obtain public liability and professional indemnity insurance as qualified electrician. 

Competence evidence: Required for Building Control notifications, Part P compliance certification, and professional standing. 

Ongoing requirements: 

Card renewal: JIB cards expire every 5 years, requiring re-application with updated qualifications. 

CPD (Continuing Professional Development): While not formally required for card renewal, staying current with BS 7671 updates and industry changes maintains competence. 

18th Edition updates: When BS 7671 is amended or a new edition released, update your qualification to maintain current knowledge. 

The Gold Card isn’t the end of your development but the foundation for your career as a qualified electrician. From here, you can specialise (inspection and testing, design, renewable technologies), progress to supervisory roles, or establish your own electrical contracting business.

References

Note on Accuracy and Updates

Last reviewed: 14 February 2026. This page is maintained; we correct errors and refresh guidance as NVQ requirements, awarding body procedures, and industry standards evolve. NVQ 2357 qualification structure and unit requirements current as of February 2026 but subject to updates from City & Guilds and EAL awarding bodies. AM2 assessment information reflects current NET Services procedures but requirements may change. Evidence examples and portfolio guidance based on real assessor feedback and current assessment standards. BS 7671 references current for 18th Edition Amendment 2 (2022) but subject to future amendments. JIB Gold Card application requirements current as of February 2026 but may be updated by JIB/ECS. Timeline estimates based on typical learner experiences; individual circumstances vary by site access, work variety, and evidence quality. This guide provides practical portfolio-building advice not formal assessment criteria; refer to awarding body handbooks for definitive unit requirements. Next review scheduled following significant changes to NVQ qualification structure or assessment procedures.

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Learners are Studying level 2 Electrician Course

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Learners are Studying level 2 Electrician Course

Guaranteed Work Placement for Your NVQ

No experience needed. Get started Now.

Prefer to call? Tap here

Learners are Studying level 2 Electrician Course

Guaranteed Work Placement for Your NVQ

No experience needed. Get started Now.

Prefer to call? Tap here

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