Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • Replies 31 replies
  • Subscribers 46 subscribers
  • Views 557 views
  • Users 0 members are here
Options
You may also be interested in

Have your say on the Electrician’s Guide to Domestic Electric Vehicle Charging Equipment Installation

Stanley Walton

The Draft for Public Consultation (DPC) is available for the IET’s Electrician’s Guide to Domestic Electric Vehicle Charging Equipment Installation. This is your opportunity to review the draft and provide feedback to help ensure the publication meets the needs of electricians, designers, installers and other professionals working with electric vehicle (EV) charging equipment. 

As EVs become increasingly common across the UK, the demand for safe, and compliant charging installations continues to grow. This guide has been developed to provide practical guidance on the selection, design, installation and certification of domestic EV charging equipment, helping practitioners navigate the technical and regulatory requirements associated with this rapidly evolving sector. 

What the guide covers 

The draft publication provides a comprehensive overview of domestic EV charging installations, including: 

  • The various EV charging modes and types of charging equipment 
  • Relevant regulations, standards and key sources of information 
  • Assessment considerations before system design and installation 
  • Methods of electrical protection and earthing 
  • Domestic and small commercial installation design, including control devices, circuit design and cabling 
  • Certification and documentation requirements 

Bringing together essential technical guidance and industry best practice, the guide is intended to support both experienced electricians and those new to EV charging installations. 

Why your input matters 

The DPC provides an opportunity for industry professionals to help shape a practical and authoritative resource for the electrical sector. Whether you are involved in EV charger installation, inspection and testing, electrical design, training or compliance, your feedback can help ensure the guidance remains relevant, accurate and aligned with current industry practice. 

Your comments will help strengthen the final publication, supporting safer installations and promoting consistency across the growing EV charging market. 

Visit the website to find out more and submit your comments by 21 August 2026: https://spkl.io/600073To0

Parents

  • I have only had a cursory skim, but I am not sure about the assessment of Ipf for 3-phase, page 110/111 and appendix F. Seems to use line to line calculation rather than the simultaneous fault all three phases. 
    Also has commercial and industrial checklist, which seems odd for a book aimed at domestic installers. I noted at least one grammar error, can’t recall where.

    From my experience, there will be few coalface contractors who will be waiting with bated breath for this unwieldy tome and even less who will be able to follow the design process set out therein. As I have often said, contractors are not mathematicians. I do not mean to be disparaging in any way, but it is painfully obvious that during my 2391 classes even a simple revision of Ohm’s law initiates glazed looks. 

    It might be nice to think that electricians could confidently and accurately design long hand as set out in the book, but if cable design is as critical in domestic premises as suggested, I think I would prefer to see it run through a proprietary program. 

  • in reply to lyledunn

    I was surprised it did not include some reference circuit design tables that considered all of the possible factors  for a typical EVSE install (volt-drop effects on Open-PEN detection, solar-gain when clipped direct in sunlight etc etc). to give a simple table or set of tables of reference designs, so that for the electrician wanting a suitable, prudent design with a reasonable safety margin they can simply use a proposed reference design, and avoid any risk of errors during various steps of calculation. The equivalent of what you get in the on-site guide but adjusted for EVSE applications.

    The other omission, and I may have missed it while skim reading through, but I didn't see anything about wiring accessories or terminal blocks and guidance on current rating of those - how much safety margin should be introduced for the continuous load implications, if the design load current is 32A it seems rather risky to use terminals/connectors etc rated for only 32A, is 40A advisible or even 50A? How much de-rating should be applied for the continuous load?

Reply
  • in reply to lyledunn

    I was surprised it did not include some reference circuit design tables that considered all of the possible factors  for a typical EVSE install (volt-drop effects on Open-PEN detection, solar-gain when clipped direct in sunlight etc etc). to give a simple table or set of tables of reference designs, so that for the electrician wanting a suitable, prudent design with a reasonable safety margin they can simply use a proposed reference design, and avoid any risk of errors during various steps of calculation. The equivalent of what you get in the on-site guide but adjusted for EVSE applications.

    The other omission, and I may have missed it while skim reading through, but I didn't see anything about wiring accessories or terminal blocks and guidance on current rating of those - how much safety margin should be introduced for the continuous load implications, if the design load current is 32A it seems rather risky to use terminals/connectors etc rated for only 32A, is 40A advisible or even 50A? How much de-rating should be applied for the continuous load?

Children
No Data

Community Rules & Guidelines