UNIT REVISION

City & Guilds 2346-03 Unit 113: Inspect, Test and Commission Electrical Systems — Complete Revision Guide

A structured revision walkthrough of every topic in City & Guilds 2346-03 Unit 113 (Inspect, Test and Commission Electrical Systems). Use it as a personal study checklist — work through each topic, tick off the points you can confidently explain or calculate, and use the linked Elec-Mate tools to practice the calculation-led parts. Designed for experienced workers consolidating skills outside a formal apprenticeship.

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8 min readUpdated 2026-05-18Andrew Moore, Founder of Elec-Mate

Written and reviewed by Andrew Moore, founder of Elec-Mate, against BS 7671:2018+A4:2026, IET Guidance Note 3 and the IET On-Site Guide.

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Key Takeaways

  • 1City & Guilds 2346-03 Unit 113 — Inspect, Test and Commission Electrical Systems — is a core component of the Electrotechnical Experienced Worker Qualification.
  • 2This unit is typically delivered to experienced workers consolidating skills outside a formal apprenticeship and covers 3 main topic areas.
  • 3Across the 3 topics there are 12 specific points you should be able to explain, demonstrate or calculate before the end-of-unit assessment.
  • 4Common assessment formats include online multiple-choice exams, written short-answer papers, and practical workshop tasks observed by your tutor.
  • 5Use the structured topic list below as a personal checklist — work through each point and confirm you can explain it without referring to your notes.
  • 6The Elec-Mate apprentice tier includes mock exams, flashcards, and revision notes mapped to this unit. Use the tools to test yourself between college blocks and on-site days.
01 · Unit Revision

Topic 1: How to confirm safety of the system and equipment prior to completion of inspection, testing and commissioning in accordance with statutory and non-statutory regulations

In this section you should be confident with the following points. Each one is a specific topic you should be able to explain, demonstrate, or calculate.

  • Carry out safe isolation procedures in accordance with regulatory requirements for electrical installations.
  • Ensure the health and safety of themselves and others within the work location during inspection, testing and commissioning.
  • Check the safety of electrical systems prior to the commencement of inspection, testing and commissioning UAN: Level: GLH: Endorsement by a sector or regulatory body: Aim: Assessment type City & Guilds Level X Award/Certificate/Diploma in Xxxxxxx (XXXX-XX) 37.
02 · Unit Revision

Topic 2: How to inspect electrical systems and equipment

In this section you should be confident with the following points. Each one is a specific topic you should be able to explain, demonstrate, or calculate.

  • Assess whether the safe system of work is appropriate to the work activity.
  • Carry out a visual inspection in accordance with the requirements of the installation specification, BS 7671 and IET Guidance Note 3.
  • Complete a schedule of inspections in accordance with the BS 7671 and IET Guidance Note 3 making technical decisions..
03 · Unit Revision

Topic 3: How to test and commission electrical systems and equipment

In this section you should be confident with the following points. Each one is a specific topic you should be able to explain, demonstrate, or calculate.

  • Select the correct test instruments and their accessories for tests.
  • Carry out tests in accordance with the installation specification and BS 7671and manufacturer’s instructions.
  • Analyse and verify test results reporting all findings to relevant persons, as appropriate.
  • Complete in accordance with BS 7671 and IET Guidance Note 3: a. Electrical installation certificates: i. Schedules of inspections ii. Schedules of test results b. Minor electrical installation works certificates.
  • Complete the handover of electrical systems and equipment to relevant persons including the provision of accurate and completed documentation regarding the completed inspection, testing, commissioning and customer satisfaction..
  • Demonstrate to the customer/client that the operation of the circuits, equipment and components are in accordance with the installation specification and customer/client requirements.

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04 · Unit Revision

Study This Unit with Elec-Mate

Elec-Mate’s apprentice tier turns this unit checklist into an active study plan. You get mock exam questions, flashcards, and revision notes mapped to this unit, plus working calculators for every calculation-led topic. Most apprentices use the app between college blocks and on the train to site — short bursts of revision compound across the year.

For apprentices

The Elec-Mate apprentice tier includes mock exams, flashcards, and revision notes for City & Guilds 2346-03 Unit 113 plus every other unit in your qualification. 7-day free trial — see your progress on the tutor dashboard.

A Five-Step Revision Plan for This Unit

A repeatable approach that works for City & Guilds 2346-03 Unit 113 and every other unit in your qualification.

1

Read through every topic point once

Start at Topic 1 and read every bullet point. Don’t try to memorise — just get familiar with the scope. Note any topic that feels unfamiliar so you can come back to it.

2

Map each topic to its calculator or guide

For calculation-led topics, open the relevant Elec-Mate calculator and try one worked example. For theory-led topics, find the matching section in BS 7671 or the IET On-Site Guide.

3

Work through Elec-Mate mock exam questions

The Elec-Mate apprentice tier includes mock questions mapped to this unit. Aim for 80%+ on a clean run before the real exam.

4

Get hands-on time on the bench

For practical units (inspection and testing, installation), ask your tutor for additional workshop access. The bench is where the points click.

5

Self-explain each topic to a peer

If you can explain a topic in your own words to another apprentice and they understand it, you know it. This is the single highest-leverage revision tactic.

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