Home EV charging points if TNCS
Regulation 722.411.4.1
(ii) requires a very low resistance earth electrode to mitigate the effects of an open circuit PEN conductor fault on the supply.
Hear two sides to this, some say good, some say bad as could get the load current of nearby customers appearing on the rod if there is a broken PEN
I do struggle a bit with differing earth potentials.
and would appreciate some guidance.
I thought you had to keep all earthing systems separate, so why some say adding a rod to a TNCS is OK, Im not sure.
Isn't earth potential going to be quite similar, in a local area, or does it fluctuate because of local installations potentially leaking fault current to earth
If someone has the time to explain , or link to any good articles on this, i would be very grateful.
Thanks
Regulation 722.411.4.1
(ii) requires a very low resistance earth electrode to mitigate the effects of an open circuit PEN conductor fault on the supply.
Hear two sides to this, some say good, some say bad as could get the load current of nearby customers appearing on the rod if there is a broken PEN
I do struggle a bit with differing earth potentials.
and would appreciate some guidance.
I thought you had to keep all earthing systems separate, so why some say adding a rod to a TNCS is OK, Im not sure.
Isn't earth potential going to be quite similar, in a local area, or does it fluctuate because of local installations potentially leaking fault current to earth
If someone has the time to explain , or link to any good articles on this, i would be very grateful.
Thanks