Discuss School block Swa supply in the Electrical Forum area at ElectriciansForums.net
Thanks,agree on that, so a code 2 regarding undersizing of earth bonding cableThe PEN conductor and not the main tails would need to be 150mm or above for a requirement of a 50mm copper bonding conductor, so despite the fact it’s 50 mm in the main building could be down to an over specced original design and it maybe even larger than what is required.
It’s the PEN conductor which determines the required size of your bonding conductor however it’s most probably correct that your swa armour is going to be well undersized.
Sometimes you just have to assume it was designed correctly if you have no original design information, the existing building I mean and not the added block.
Not sure what that’s off but bonding on a pme arrangement has nothing to do with the csa of the line or neutral conductors in the consumers side, it’s the DNO PEN conductor csa you need plus the DNO May stipulate a csa regardlessThis only goes up to 70mm,,Main bonding over that is 50mm
Doubt they even know Cliffed, some aren’t very helpful in my experienceYea ok,not got the exact Eon supply conductors,will try & source that.
Saying that the earth bond conductors already installed in the main block are 50 mm.
Agree,my wording may not be 100%,I know the armouring can be used for cpc,Main earth terminology was incorrect,to ask if I know what I’m talking about,seems a bit rude,but hey oh,have a good bank holiday.You really need to use the correct terminology when discussing or asking questions about this sort of thing.
Talking about main earth's and using an SWA sheath as cpc makes it appear confusing or that you don't know what you are talking about.
The SWA sheath is made of plastic, it's the armour which is under the sheath which can be used as a protective conductor.
Mixing up terms like CPC, main bond, main earth etc confuses the issue a lot.
Thanks will note on Eicr,code 2 for me.It is almost certain the armour will not be able to support bonding given the possible supply PEN size.
Thanks For your inputDoubt they even know Cliffed, some aren’t very helpful in my experience
Agree,my wording may not be 100%,I know the armouring can be used for cpc,Main earth terminology was incorrect,to ask if I know what I’m talking about,seems a bit rude,but hey oh,have a good bank holiday.
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