Alan

It came in the 17th edition AMD 3 in 2015.

JP

John Peckham said:

It came in the 17th edition AMD 3 in 2015.

Sorry JP - normally you would be spot-on, but it was actually around 18 months earlier, BS 7671 Amendment 2:2013 (1 August 2013).

As this was a separate Amendment publication, like Amendment 1:2020 to BS 7671:2018, John is sort of right that it never appeared the "big [coloured] book" until BS 7671:2008+A3:2015.

Alan B said:

I am wondering if the install ever complied with the regulations. Looking at regulation 722.531.2.101 it's in the first 18th edition but i don't know if ev charging was even in any of the 17th editions?

Amendment 2:2013 to BS 7671:2008, first introduced Section 722. As it was introducing a new Section, it came into force immediately for designs after 31 July 2013 (according to the introduction).

The Regulation from Amendment 2:2013 reads as follows (and in wording is very different to Regulation 722.531.3.101 that is in the current BS 7671:2018+A2:2022):

722.531.2.101 Every charging point shall be individually protected by an RCD having the characteristics specified in Regulation 415.1.1.The RCD shall disconnect all live conductors, including the neutral.
The RCD protecting the charging point shall be at least a type A RCCB complying with BS EN61008-1 or RCBO complying with BS EN 61009-1. If it is known that the d.c. component of the residual current exceeds 6 mA then a type B RCD complying with BS EN 62423 shall be installed.

Alan B said:

Also quite shocking that I can't get a 100A type A RCCB from Schneider for the easy 9.

A year or two ago, I'd have been happy with any type A RCD for an Easy 9 board. I contacted Schneider, who gave me a part number. The only supplier that I found online was Screwfix in Ireland.

In UK, they still seem to be supplying 2 x type AC RCDs.

Thanks for the answers, I am still amazed at the poor designs i see in new builds

Looking at it from a manufacturers point of view the market for 100 amp RCDs is very limited.

Mainland Europe doesn’t have single phase domestic installations with 100 amp supplies and there’s not actually a huge number in the UK with the majority being fused at 60 amps.

Until we were told we cannot allow diversity when rating RCDs nobody worried anyway.

I can see where you are coming from. Interesting that from what you believe most UK supplies are fused at 60A. It must vary a lot by area. In the last year I have pulled probably 60 fuses, something like 70% have been 100 amp and the rest 80A. Most of this has been in relation to EV charge points, so no flats and typically larger and newer houses which I am sure skews the numbers.

My own supply, which is looped, was down rated from 100 amps over ten years ago, which doesn’t worry me at the moment.

I bought a data logger and tried it out at home, it doesn’t record below 10 amps so didn’t record much at all, over a fortnight it peaked very briefly at 32 amps, so I would not worry about installing an EV charger at home without altering anything.

I possibly hold the largest stock of Wylex HRC fuses and bases, all new sealed in their original packaging, should you just happen to need one.

www.tlc-direct.co.uk/.../WYC40.html

Interesting that from what you believe most UK supplies are fused at 60A. It must vary a lot by area.

Indeed - around here (Northern Power Grid) I understand that their policy now is for 80A max or 60A for looped services - while there are still a few 100A fuses about from earlier policies, they resist installing them now.

   - Andy.