Earth Resistance Allowances

[BlueArc]

Hi guys

Does anyone has a copy or know where I can get hold of a copy of the maximum allowable earth resistance for the earth electrode test. I know in Cape Town is cannot be more than 2 ohm's but I want some black and white documentation to prove this.

[bergie]

its 20 ohms in cape town.i will have a look for proof when i get a gap.

[AndyD]

It's going to vary depending on the size of the supply but you can just work it backwards from the maximum permissable disconnection times.

[bergie]

sorry,i meant 20 ohms for a typical domestic supply. 60 amps single phase