1.25ohm external earth fault loop impedance on TN-S supply to building
Supply authority stated our only option is a TT conversion as they will not covert to PME.
What would be my best course of action when converting to a TT as the building is quite old and i do not want a 100ma main switch for diversity reasons and nuisance tripping, so Would it be suitable to convert to TT and have all final circuits in a RCBO with a board charge?
Supply authority stated our only option is a TT conversion as they will not covert to PME.
What would be my best course of action when converting to a TT as the building is quite old and i do not want a 100ma main switch for diversity reasons and nuisance tripping, so Would it be suitable to convert to TT and have all final circuits in a RCBO with a board charge?