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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.

Further information and registration for this event can be found here

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

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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Graham supports the Mayor of London’s plan for electric vehicle charging infrastructure

Our Managing Director, Graham Kenyon, was pleased to support London Mayor Sadiq Khan’s launch of the plan for the electric vehicle charging infrastructure in London on Monday 17 June 2019.

Graham, Chair of the IET’s Wiring Regulations Policy Committee, author of the 3rd Edition of the IET’s Code of practice for electric vehicle charging equipment installation, chaired a technical question and answer session as part of the launch event.

Read more about the launch in this IET Member News article.

Photo from IET Member News article

IET Academy on-line course for EV Charging equipment installation

G Kenyon Technology Ltd, as a content partner with IET Academy, have developed an on-line course for EV charging equipment installation. It has been updated to the latest 4th Edition (2020) and BS 7671:2018+A1:2020. Read more about this course.

Book now with the IET Academy

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New on-line course for electric vehicle charging equipment installation

** now updated to BS 7671:2018+A1:2020, and the 4th Edition of the IET Code of practice for electric vehicle charging equipment installation **

G Kenyon Technology Ltd, as a content partner with the IET Academy, has developed an on-line course for designers and installers of Electric Vehicle Charging Equipment Installations.

Book now with the IET Academy

Learn on-line, at your own pace

Course Overview

This course will cover: the design of electrical installations for, and specification of, electric vehicle charging equipment installations; the requirements detailed in Section 722 of BS 7671:2018; and recommendations of the IET Code of Practice for Electric Vehicle Charging Installations, 3rd Edition. It provides an understanding of the key requirements for protection against electric shock, including selection and use of earthing systems, and introduces vehicle-as-storage, wireless power transfer (WPT) and smart infrastructure installations.

Book now with the IET Academy

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Draft for Public Comment (DPC) for IET Code of Practice for Electric Vehicle Charging Installations, 3rd Edition

Cover of IET CoP for EV charging installations, 2nd Edition

The 3rd Edition of the IET Code of practice for electric vehicle charging installations is due to be published later in 2018.

A draft for public comment is now available from the IET web-site: https://www.theiet.org/resources/standards/dpc-ev-3rd-ed.cfm

The consultation period will end on 28 February 2018, and all comments must be submitted to the IET by this date, in accordance with the instructions in the link above.

NOTE: G Kenyon Technology Ltd are not responsible for the content of other web-sites linked from this page.