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Wiring Regulations 18th Edition: What we know so far...

Wiring Regulations 18th Edition: What we know so far...

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The IET Wiring Regulations – otherwise known as BS 7671 – are currently under full review, with a new 18th edition planned for the near future. Although the proposals are still in draft form, the ECA provides an update on the timeline and some of the likely changes:

Why the changes?

  • Harmonisation with CENELEC and IEC 60364 standards
  • An opportunity to clarify existing regulations  
  • Allows new technology and methodology to be incorporated

Anticipated Timeline

  • 1 June – 24 August 2017: Draft for Public Consultation (DPC)
  • 24 August – 9 November 2017: JPEL panels review public comments
  • 9 November – 30 November 2017: JPEL 64 approval of DPC changes
  • 28 June 2018 – 18th Edition published
  • 1 January 2019 – 18th Edition comes into full effect

Significant headline changes

  1. Protection against overvoltages – Updated guidance on Surge Protection
  2. Protection against Fire – Updated guidance on Arc Fault Detection
  3. Updated guidance on Special Locations
  4. New Part 8 Energy Efficiency

NEW – Part 8 – Energy Efficiency

Up until now BS7671 has only ever taken steps to safeguard against fire and electric shock. A proposed new section in BS7671, harmonised document IEC 60364-8-1’ details the steps to be taken during the design process to consider the energy efficiency of an electrical installation.  This document gives a framework for clientsto stipulate levels of energy efficiency, in order to to achieve:

  • Less impact on the environment
  • Reduction of energy losses and energy cost
  • Use of energy at lower tariffs
  • Less reactive maintenance
  • Optimisation of performance for life cycle

Representing the practitioners view

The ECA technical team have representation on all of the following committees which help determine the Wiring Regulations:

  • JPEL 64 Committee  - Final approval
  • Sub Committee Panel A – Covers: definitions, verification, inspection & testing
  • Sub Committee Panel B – Covers: thermal effects, cable sizing
  • Sub Committee Panel C – Covers: protection against electric shock, isolation and switching
  • Sub Committee Panel D – Covers: special locations & external influences

What ECA are doing

  • Consulting our members and wider industry on the changes and representing views
  • Creating cost saving initiatives to smooth the complete process
  • Providing guidance and updates to contractors, clients and the wider industry

For more infotmation, visit ECA Project 18 webpage.

If you would like to comment on anything you have read, please contact

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