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Category Archives: EV Charging

Graham Kenyon and Michael Peace on the Renewables Podcast

The IET’s Michael Peace, and Graham Kenyon, Chair of the joint IET/BSI Committee JPEL/64, responsible for BS 7671, join Mark Allison and Sam Featherstone for the 23 May 2024 edition of the Renewables Podcast. Among the many topics discussed are:

  • Amendment 3:2024 Draft for Public Comment
  • Bidirectional protective devices
  • PAS 63100:2024
  • The relationship between BS 7671 and international standards
  • Electrical Energy Storage Systems and the 3rd Edition of the IET Code of Practice

Launch of the IET Code of Practice for Electrical Energy Storage Systems 3rd Edition now available on YouTube

The Launch Event that took place on Tuesday 21 May 2024 is now available on YouTube:

Graham Kenyon to Speak at Solar & Storage Live, 29 April 2024

Managing Director, Graham Kenyon, will speak at Solar & Storage Live event in London on Monday 29 April 2024.

10:20, Venue: Everything Installer theatre

Topic: Launch of the 3rd edition of the IET Code of Practice for Electrical Energy Storage Systems

11:20, Venue: ChargeEV theatre

Topic: Latest developments in EV Charging Installations

Graham will also be taking part in discussion sessions in the afternoon of 29th.

Click here to go to the Solar & Storage Live London 2024 event page

Launch of the 5th Edition IET Code of Practice for Electric Vehicle Charging Equipment Installation

Graham Kenyon presented a webinar on the 5th Edition of the IET’s Code of Practice for Electric Vehicle Charging Equipment Installation, for which he is the technical author. The webinar included questions and answers session, streamed live from the IET, Futures Place, Stevenage, on Tuesday 31 October 2023.

This Webinar is available on-demand via IET TV:

Draft for public comment for 5th Edition of the IET Code of Practice for EV Charging Equipment Installation

The 5th Edition of the IET’s Code of Practice for Electric Vehicle Charging Equipment Installation is now available for public comment. The Draft for Public Comment period is open until 3rd April 2023.

Our Managing Director, Graham Kenyon, is proud to again author this Edition.

For instructions on how to comment, and access the Draft, please visit the IET’s web-site for the consultation via the following link: https://electrical.theiet.org/get-involved/consultations/draft-for-public-comment-code-of-practice-for-electric-vehicle-charging-equipment-installation-5th-edition/
NOTE May 2023: hyperlink removed, as web-page has been removed from host site

IET virtual Elex event 2021

IET Virtual Elex showcase is now available.

Our Managing Director, Graham Kenyon, has contributed to the virtual panel discussions on protective multiple earthing (PME) and electric vehicle charging equipment installation.

Click here to view the event, or watch the associated videos through YouTube below:

Supplement: Electric vehicle charging installations at filling stations now available

Cover, Electric vehicle charging installatioins at filling stations

Graham Kenyon, our Principal, has contributed to this important industry publication, which deals with the additional requirements for electric vehicle charging equipment installations at filling stations.

This supplement will be invaluable for those working with EV charging equipment at filling stations, and includes earthing performance requirements for Mode 4 electric vehicle supply equipment with an IT earthing arrangement.

The publication is now available to purchase from the APEA web-site.

Free webinar – Electrical diversity and load curtailment

Load Curtailment Example © G Kenyon Technology Ltd 2020

On 28th July 2020, our Managing Director, Graham Kenyon, is presenting on the topic of Maximum demand and load curtailment for EV charging equipment installations as part of the IET Webinar Electrical Diversity and Load Curtailment. Mark Coles, IET Technical Standards Manager, is also presenting, and the event, along with its Q&A session, will be hosted by John Peckham.

Did you miss this? Don’t worry – simply register now to view after the event!

Further information and registration for this event can be found here

NOTE: In December 2023, the IET announced technical difficulties with some of its on-demand webinars. Please accept our apologies for any inconvenience caused if any of the webinars originally presented between October 2017 and November 2021 are temporarily unavailable. G Kenyon Technology Ltd is not responsible for content linked from this post.

Title: Electrical Diversity and Load Curtailment (EVC)
Date: Tuesday 28th July 2020
Time: 3 pm BST, 7 am USA PST, 10 am USA EST
Duration: 1 hour

IET Wiring Matters Article on the 4th Edition EV Code of Practice

Our Managing Director, Graham Kenyon, has prepared an article for the latest Issue 80 – May 2020 – of the IET’s Wiring Matters industry publication. looking at the the key changes in the 4th Edition of the IET Code of Practice for Electric Vehicle Charging Equipment Installation.

As Graham is the technical author of the publication, the article provides a unique perspective on the technical aspects.

Read the article here

The online course for EV charging equipment installation has also been updated to reflect the 4th Edition of the IET Code of Practice, and Amendment 1 (2020) to BS 7671:2018.

Fourth Edition of the EV Code of Practice now available

The 4th Edition of the IET Code of Practice for Electric Vehicle Charging Equipment Installation is now available. Our Managing Director, who is the lead author of the publication, provides a commentary on the key changes and new information.

The 4th Edition, available from the IET, is updated to BS 7671:2018 + A1:2020, and also includes:

  • guidance for on street installations updated to cover a wide range of situations
  • new information on load unbalance in three-phase installations
  • guidance on the selection and use of new open-PEN detection
  • guidance on the dangers associated with TT islands, and safe separation distances below ground for earth electrodes
  • Amendment 1 (2020) to BS 7671:2018 in its entirety

Open PEN detection where PME conditions apply

Regulation 722.411.4.1 (iii), (iv) and (v) permit the use of protective devices which detect open-circuit protective earth and neutral (PEN) conductors in the PME supply.

These devices are relatively new, and there are no product-specific standards available at present. The 4th Edition provides the guidance that installers need to select and install these new protective devices.

The device described in 722.411.4.1 (iv) is only suitable for installations with single-phase supplies, and should not be used for single-phase charging equipment in a three-phase installation. An important feature of the wording in 722.411.4.1 (iii) and (iv) is that the devices shall not be capable of re-closing onto the conditions they detect are hazardous. In order to provide equivalent safety, a device described in 722.411.4.1 (v) must also have the same feature.

A new approach to phase unbalance in three-phase systems

Our Managing Director has developed a new approach to determining whether exception (i) to Regulation722.411.4.1 applies in a three-phase system. This method removes the need for calculations using the formulas in Annex 722, A722.1 and A722.2, and relies only on knowledge of the worst-case unbalance conditions, and either use of a lookup table, or application of a rule-of-thumb.

This method is described fully in Annex J of the IET Code of Practice for EV Charging Equipment Installation 4th Edition.

Updated guidance on deriving a TT earthing arrangement from a TN supply

Unsafe installation practices have been observed where a separate TT supply is used for electric vehicle charging equipment. Further, this approach may not offer any benefit at all in small curtilage properties, such as a common semi-detached dwelling.

New and extended guidance is now included, to help designers and installers:

  • determine when it is unsafe to employ a TT earthing arrangement in installations with TN supply earthing arrangements
  • understand the risks associated with driving electrodes
  • ensure adequate separation distances below ground, between exposed-conductive-parts connected to different earthing arrangements
  • ensure an adequate separation distance below ground between the TT earth electrode, and buried conductive parts connected to the TN earthing arrangement, and understand that in certain cases, distribution network operators require a greater separation distance

Other new or revised guidance

There is an update to the section on Vehicle as storage, including new material by Dr Andrew Crossland and Mark Collins of Advance Further Energy, and new arrangements for installation of EVSE in prosuming installations by our Managing Director. The section on Integration and smart infrastructure has also been updated to include new material from Cameron Steel of Silver EMS.

The DNO notification process has been updated, and guidance is now included on earthing arrangements for the installation of Mode 4 (DC rapid charging) EVSE, some of which employs isolation between the AC source and the DC vehicle charging supply.

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