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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

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