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Thread: Earth Resistance Allowances

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    Earth Resistance Allowances

    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.

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

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

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