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Discuss SWA For meter tails? in the UK Electrical Forum area at ElectriciansForums.net
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Yes I was wondering about cable enclosure if I don't use SWA. Seemingly 25mm Conduit can be used, according to the cable factors.I wonder how the cable conductors will be enclosed or the cable glanded for that matter.
The DNO May allow 5 metersSorry for the slow reply to everyone. Been out for my daughters birthday. To answer some of the questions the DNO is due to come to upgrade my main fuse to 100A (extension project including an induction hob) so the tails to the CU need upgrading 1st. Did diversity calcs and I'm struggling to get it down to 100A actually.
I did have a DP isolator switch fitted by my provider in anticipation, so no seals being broken, but I'm not sure that it's fused...
I'm hoping it's less than 3m, but it's fairly close, so need to measure again when I know how I'm routing the cable.
Don’t forget the earthing conductorYes I was wondering about cable enclosure if I don't use SWA. Seemingly 25mm Conduit can be used, according to the cable factors.
16mm factor = 145
25mm Cable factor = 217 2x217 = 434
Total = 589
But I can't quite see how two 25mm cables fit in a 25mm pipe? Maybe something about the size of the cable I'm missing as I don't actually have any 25mm tails.
My main fuse is due to be upgraded to 100A due to an extension project that involves an induction hob. Actually with my diversity calcs, I'm struggling to get it down to 100...Why do the tails need rewiring? What is the Earthing system?
TN-CSWhat is the Earthing system?
No seals being broken. I had an isolator fitted by my provider in anticipation, I'm not aware of it being fused however.So he WILL break the seals then?
DNO replace the fuse, but they won't do the tails to the CU.Surely that is a job for the DNO?
Thanks for the link. That's the cable I looked at first, but doesn't OD stand for outside diameter? How can that be 25mm if the individual cores are 25mm?25mm SWA is common stuff for example
25.0mm² 6943X 3 core SWA Steel Armoured Cable
You will have some challenges with bend radius. I assume that you will (have already) a switch/fuse at the cut out end? Due to the length of the tails?
PS Why do you feel that an upgrade to 25mm is needed?
Don’t forget the earthing conductor
The cable are reffering to 25mm2 csa, not diameterYes I was wondering about cable enclosure if I don't use SWA. Seemingly 25mm Conduit can be used, according to the cable factors.
16mm factor = 145
25mm Cable factor = 217 2x217 = 434
Total = 589
But I can't quite see how two 25mm cables fit in a 25mm pipe? Maybe something about the size of the cable I'm missing as I don't actually have any 25mm tails.
Thanks for the link. That's the cable I looked at first, but doesn't OD stand for outside diameter? How can that be 25mm if the individual cores are 25mm?
Don’t forget the earthing conductor
The cable are reffering to 25mm2 csa, not diameterYes I was wondering about cable enclosure if I don't use SWA. Seemingly 25mm Conduit can be used, according to the cable factors.
16mm factor = 145
25mm Cable factor = 217 2x217 = 434
Total = 589
But I can't quite see how two 25mm cables fit in a 25mm pipe? Maybe something about the size of the cable I'm missing as I don't actually have any 25mm tails.
It does but as Pete999 says, the reference is to 25mm2 CSA SWA. It looks to be a happy coincidence of maths, manufacturing and electrical requirements that this 25mm2 SWA has a nominal OD of 25.1mm
Not an option given I'm struggling to get diversity calcs down to 100A and I already have 16mm tails anyway.if he's got to fit switch fuse, he might be better off dropping to 80A SW/F and then using 16.0mm SWA. easier to install.
Not an option given I'm struggling to get diversity calcs down to 100A and I already have 16mm tails anyway.
Reply to SWA For meter tails? in the UK Electrical Forum area at ElectriciansForums.net
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