Errata for this edition (November 2012).

Also available as an e-book

This Code of Practice, published January 2012, aims to provide expert guidance on EV charging equipment installation, an important emerging area which is not covered in detail by the current edition of the Wiring Regulations (BS 7671) or the IET’s Guidance Notes.

Aimed at  experienced electricians interested in understanding a wide range of equipment and systems available, it covers the specialised installation requirements of electric vehicle charging equipment in public, private and commercial locations.

The Code of Practice provides detailed on-site guidance and recommendations on all aspects of the installation from the origin of the electrical supply, through distribution and final circuits, installation of the charging equipment itself to the cable between the charging equipment and vehicle's electrical inlet. Also included are related issues of site layout and planning and subsequent inspection, testing, certification and maintenance of installations.

Exclusive guidance on latest electrical requirements

The Code of Practice includes an overview of all types of equipment, connectors and cables that an installer is likely to encounter and provides detailed references to all relevant standards and regulatory requirements in the UK – including, in Section 5, the latest guidance based on advice from the HSE on:

  • When to use TT earthing
  • Special precautions for connecting to TN-C-S (PME supplies)
  • The use of electrical separation, isolating transformers and RCDs
  • The need for a separate, dedicated electrical circuit for EV charging.

Written by industry experts

This authoritative and timely document has been developed by a committee of experts representing the key players across the EV industry:

  • British Electrotechnical and Allied Manufacturers Association (BEAMA)
  • Charging equipment manufacturers: Chargemaster, Elektromotive, Pod-Point
  • Electrical contractors: ECA, SELECT
  • Electrical Safety Council
  • Energy Networks Association
  • Energy Retail Association members: Centrica, EDF, E.ON, RWE Npower, Scottish Power, Scottish & Southern Energy
  • Energy Technologies Institute (ETI)
  • Government: OLEV, HSE, DCLG
  • Plugged-In Places scheme members: Charge Your Car (North), Source East, Source London
  • Society of Motor Manufacturers and Traders (SMMT)
  • The IET’s Technical Regulations team

Book readership

This is a hands-on guide of immediate practical use to trained installers. The Code will also be invaluable to administrators and managers specifying and procuring EV charging equipment and contractors. Finally, it will be essential reference for manufacturers of cars and charging equipment who need guidance on how to meet the requirements of electrical supply and installation standards. 

Book contents

  1. Scope
  2. Overview of electric vehicle charging equipment
    • Charging equipment for Modes 1, 2, 3 & 4
    • Socket outlets and charging cables
    • Other variations in EV charging equipment design and specification
  3. Arrangements prior to installation commencement
    • Supply metering
    • Adequacy of supply
    • Existing earthing arrangements
    • Simultaneous contact assessment
    • GPRS coverage
    • Charging equipment manufacturer’s instructions and requirements
    • Planning permission
    • Traffic management orders
    • Agreeing installation details with client
  4. Physical installation requirements
    • Potentially explosive atmospheres
    • Location of charging equipment relative to parking space
    • Protection against vehicle impact
    • Location of controls and socket outlets
    • Free space around charging equipment
    • Ventilation and cooling
    • Avoidance of trip hazards
    • Avoidance of unnecessary obstruction
    • Labelling of BS 1363 socket outlets
  5. Electrical requirements – General
    • Earthing and protective equipotential bonding requirements
    • Circuit design, cable specifications and dimensions
    • Protection against electric shock
    • Provision of RCDs
    • Isolation and switching
    • IP ratings
    • Lightning protection systems
  6. Electrical requirements – Domestic installations
  7. Electrical requirements – On street installations
  8. Electrical requirements – Commercial and industrial installations
  9. Inspection, testing and maintenance requirements
  10. DNO notification


A – Charging connectors and charging cable types

B – Example of DNO notification form

C – Checklists for domestic installations

D – Checklists for on-street installations

E – Checklists for commercial and industrial installations

F – Glossary

G – List of figures and tables

H – References

You can also purchase or get further information by contacting IET Standards on +44 (0)1438 767684 or Fax: +44 (0)1438 765563.

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