Well UKPN, I wonder who the dinosaurs are? I assume that you are referring to JPEL/64 members, where there is DNO representation. I was told by the HSE Engineer just yesterday that there were more than 1000 broken neutral events reported last year, and if one of those happened to be your car on charge, and you were washing it at the same time, you might be gone for good. Now, I may have no particular objection to that event, but your family and friends might take it fairly seriously, and those failing to stick to the regulations could well end up in court.


"Getting it right" as you call it is in reality fairly difficult, and in fact, there appears to be no completely safe option unless an isolation transformer is used, and even this has difficulties with access to differing Earthing systems. Do you know, even the DNO jointers are fairly sniffy about that, at least in my area, and the responsible Engineer is definitely very wary!


Good luck with your PME, I assume you are campaigning against John Peckham in the campaign for real Earthing listed in the topics?


David, CEng etc.

An equipment manufacturers explanation


If the car is charging indoors then TNCS earthing may not be an issue if that is what it is, but otherwise it’s time to get the big hammer out and put a rod in to make it TT.


That is for the EV charger, there is also the the hot tub to consider.

Thanks Sparkingchip‍ 

TT I think?

It looks like you are off to a good start and can forget about the issues of using a TNCS earthing system as it looks like TT.


Hopefully you have an appropriate upfront RCD and earth rod, however you don’t want casual connections to the TNCS through shared metal gas and water pipes from neighbouring homes.

Not being TNCS and having to deal with associated issues leaves more money to spend on RCDs :-)

There’s a link in that first article I posted to a more detailed explanation.


Andy B.

Thanks Sparkingchip‍ il have a read. 

think I have the information I need now. Thanks everyone for your help and opinions.