UNIT REVISION

City & Guilds 2357 Unit 322: Understanding the practices and procedures for planning and preparing to maintain electrotechnical systems and equipment (ELTK 09a) — Complete Revision Guide

A structured revision walkthrough of every topic in City & Guilds 2357 Unit 322 (Understanding the practices and procedures for planning and preparing to maintain electrotechnical systems and equipment (ELTK 09a)). 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 apprentices working through an NVQ pathway with on-the-job portfolio evidence.

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9 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 2357 Unit 322 — Understanding the practices and procedures for planning and preparing to maintain electrotechnical systems and equipment (ELTK 09a) — is a core component of the Level 3 NVQ Diploma in Installing Electrotechnical Systems and Equipment.
  • 2This unit is typically delivered to apprentices working through an NVQ pathway with on-the-job portfolio evidence and covers 4 main topic areas.
  • 3Across the 4 topics there are 23 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: The principles, regulatory requirements and procedures for preparing work sites for the maintenance of electrotechnical 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.

  • State the appropriate requirements of regulations that are applicable to electrotechnical maintenance work activities.
  • Specify the actions required to ensure that electrical maintenance work sites are correctly prepared in terms of Health and Safety considerations.
  • Specify the requirements for preparing and reviewing the work location prior to commencement of maintenance work activities.
  • Identify personal protective equipment appropriate to the work activity being carried out.
  • Confirm that tools and equipment are fit for purpose and (where appropriate) are correctly calibrated..
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02 · Unit Revision

Topic 2: The procedures for checking the work location prior to the commencement of work activities

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.

  • State the preparations that should be completed before electrical maintenance work starts.
  • Explain how to check for any pre-existing damage to client property and state why it is important to do this prior to commencement of any work activity.
  • State the actions that should be taken if pre-existing damage to customer/client property, plant or machinery is identified.
  • Specify methods for protecting the fabric and structure of property, plant or machinery before and during maintenance work..
03 · Unit Revision

Topic 3: How to determine client requirements for the maintenance of 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.

  • Interpret site drawings, plans, maintenance schedules/specifications and the work location to determine client requirements.
  • Interpret appropriate sources of information when determining client requirements.
  • Evaluate possible proposals to determine how well they meet: • client requirements • site structures and features • industry requirements.
  • Identify methods of presenting information to clients to agree and proceed with a plan of work.
  • State the process and implications that a change in work plans can have in terms of: • health and safety • cost • time • progress • authorisation.
  • Identify that proposed replacement systems or components comply with industry requirements and where appropriate, give alternative system options which take account of environment and efficiency..

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04 · Unit Revision

Topic 4: How to determine work requirements for the maintenance of 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.

  • State the characteristics of different types of electrical maintenance activities.
  • Specify the importance of: • agreeing start dates, finish dates and timings • procedures for agreeing variations to the maintenance specification or schedule.
  • Define the specific.
  • State how specific job information can be used to help develop work proposals.
  • Specify the replacement/re-fitting requirements for components within maintained electrical systems and equipment.
  • State appropriate methods for determining the size and specification /type of components to be used when maintaining electrical systems and equipment.
  • Interpret drawings and maintenance schedules /specifications to calculate resources required to complete electrical maintenance work.
  • Identify the implications that different working conditions could have on equipment and components in an electrical installation..
05 · 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 2357 Unit 322 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 2357 Unit 322 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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