Hello All,
I’ve been asked to install a cable 170m in SWA, this is to be pulled through ducting. The cable is straight from the meter to an isolator in a beach hut. As the property is so small with little electrical appliances, I have accounted for 45A max current and deduced a 35mm2 SWA. Is this correct, I’ll just fit a 40A RCD on the CCU. I only ask because if I apply 3% volt drop I end up with a cable between 70 and 90mm2. This seems massively ott. Any comments would be great as although I’ve been an electrician for 10yrs+ it’s mostly been on the commercial side and I’ve not really had much to do with domestic supply cables. Thanks very much in advance.
I’ve been asked to install a cable 170m in SWA, this is to be pulled through ducting. The cable is straight from the meter to an isolator in a beach hut. As the property is so small with little electrical appliances, I have accounted for 45A max current and deduced a 35mm2 SWA. Is this correct, I’ll just fit a 40A RCD on the CCU. I only ask because if I apply 3% volt drop I end up with a cable between 70 and 90mm2. This seems massively ott. Any comments would be great as although I’ve been an electrician for 10yrs+ it’s mostly been on the commercial side and I’ve not really had much to do with domestic supply cables. Thanks very much in advance.
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