Discuss Terminating SWA Cable. in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

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UK_Night_Owl

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I wounder if anyone would be so kind as to offer some advice. It's not something I'm actually wiring up, it's just a little theory project to do with college.

If I want to come from a breaker switch in a distribution board, and run a supply along a cable tray in SWA cable to a 32amp three phase and earth interlocked socket. From looking in tables I have figured I'm going to need to use 4.0mm SWA cable and obviously I'm going to have to terminate the cable at each end using glands. What I'm not sure about is how many core cable should I use, as should I use the outer steel wires of the cable as the CPC Earth), which would mean I could use 4 core cable, or should I use 5 core cable, and one of the cores of the cable as the CPC as well as connecting the outer steel wire sheath to earth?

The other thing I'm not too sure about, if I can use the outer of the cable as CPC, when I terminate it to the interlocked socket, this has a plastic housing. Would I therefore use one of those washers around the gland with a the little bit that sticks out and make a connection to this and then take this in to the earth terminal?

Thanks for any advice offered

David
 
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