Ah ok, it is somethig I've had saved on my laptop for a while, I've not tried verifying the values. In fact there are CPC columns too but I'm sure it needs updating.
so 8.5kw could be fine. but just to be safe i gonna find another 7.5kw shower to replace with as i dont want electrician to replace the cable to higher rating as it will cost a lot of money..
Ah ok, it is somethig I've had saved on my laptop for a while, I've not tried verifying the values. In fact there are CPC columns too but I'm sure it needs updating.
Measure the copper core diameter with a micrometer and calculate the cross sectional area using pi times dia divided by 4. Multiply by the number of strands.
each core has 7 copper strands and each copper strand is 1mm
no idea how to calculate the cross sectional area. i think i'll leave it and get an electrician to find out for me.
I might have been as kind but after a day of hunting the errors in a large assembler language programme my tolerance of errors was ( is ) close to zero.
As for 'where it originated', it looks very much as if it is a copy of what I uploaded to the DIYnot wiki years ago (that is, when I could actually access {to edit} the wiki - I thought that was the idea of 'a wiki'?!).
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