S
spidersparks
Hi guys had a conversation with the boss in the office after work today about a zs I got on a 32A c type rcbo bs 61009, the earthing system is TN-C-S, he said he wasn't worried I got a zs reading of 0.90 even though a type c 32A rcbo has a max zs of 0.72 his words were "it's just like a TT system, when you have a high zs because of the electrode" my understanding was that as its on a TN system it would still have to meet disconnection times in table 41.1 in the BGB, I wanted the change it to a type B then I can go up to 1.44 which I'm well in. what are your thoughts? Many thanks
David
David