UNIT REVISION

City & Guilds 2357 Unit 602: Understanding environmental legislation, working practices and the principles of environmental technology systems (ELTK 02) — Complete Revision Guide

A structured revision walkthrough of every topic in City & Guilds 2357 Unit 602 (Understanding environmental legislation, working practices and the principles of environmental technology systems (ELTK 02)). 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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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 2357 Unit 602 — Understanding environmental legislation, working practices and the principles of environmental technology systems (ELTK 02) — 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 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: The environmental legislation, working practices and principles which are relevant to 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.

  • Specify the current, relevant legislation for processing waste.
  • Describe what is meant by the term environment.
  • Describe the ways in which the environment may be affected by work activities.
  • Identify and interpret the requirements for electrical installations as outlined in relevant sections of the Building Regulations and the Code for Sustainable Homes.
  • State materials and products that are classed as: • hazardous to the environment • recyclable..
  • Describe the organisational procedures for processing materials that are classed as: • hazardous to the environment • recyclable..
02 · Unit Revision

Topic 2: How work methods and procedures can reduce material wastage and impact on the environment

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 installation methods that can help to reduce material wastage.
  • Explain why it is important to report any hazards to the environment that arise from work procedures.
  • Specify environmentally friendly materials, products and procedures that can be used in the installation and maintenance of electrotechnical systems and equipment. 56 City & Guilds Level 3 Diplomas in Electrotechnical Technology (2357) Unit 602 Understanding environmental legislation, working practices and the principles of environmental technology systems (ELTK 02).
03 · Unit Revision

Topic 3: How and where environmental technology systems can be applied

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.

  • Describe the fundamental operating principles of environmental technology systems.
  • State the applications and limitations of environmental technology systems.
  • State the Local Authority Building Control requirements which apply to the installation of environmental technology systems..

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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 2357 Unit 602 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 602 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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