J
Jimmyb
Hello, Can someone give me some advice on the bonding size for the steel structure on a farm building, supply is TNS 35mm with 25mm earth (Meter tails are 25mm), from there it is 10mm 4core (with the cores doubled up ie 20mm L&N) for 40meters to shed.
The earth & bonding is currently though the swa steel which i worked out to be 20.3mm, the bonding is 3 meters of 16mm from cu to steel, I thought 16mm was ok but after looking a other posts im thinking it might need to be 25mm im i missing something ??
thanks jimmy
The earth & bonding is currently though the swa steel which i worked out to be 20.3mm, the bonding is 3 meters of 16mm from cu to steel, I thought 16mm was ok but after looking a other posts im thinking it might need to be 25mm im i missing something ??
thanks jimmy
