Does 1mm SWA exist? | on ElectriciansForums

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1Justin

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I was on a domestic site the other day in the pitch dark, surveying for a customer who has a skinny 4 core SWA laid to their shed already and now wants a 13A socket. It was not possible to make out the cable embossed markings since they were underground, but my vernier caliper on a single strand (7 strands per core) made it much closer to 1mm^2 (0.426mm dia) than 1.5mm^2. (0.522mm) (The difference per strand being is only < 0.01mm).

So..1mm SWA. I can't find anyone listing it, - does it exist?

If not, I might assume this is 1.5mm and -it was my semi-frozen calipers which were the problem.
 
Out of interest, in respect of CSA of conductors do the measurements actually relate to the real CSA of the conductor i.e. as pi r 2 or are they more closely related to the diameter?
 
Out of interest, in respect of CSA of conductors do the measurements actually relate to the real CSA of the conductor i.e. as pi r 2 or are they more closely related to the diameter?
You are not making your question clear Alan. Care to re-phrase? (There are normally seven conductors in the stranded cables we use. Measure diameter of one, work out CSA. You did that at school)
 
When a conductor is referred to as 1mm square is that based on the actual circular CSA of the conductor or is it based on the cable being 1 mm in diameter?
 

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