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yes-i know,but otherwise there is no reason why they can't be paralleled is there? on pme
No reason.
Discuss Can we use the armour of an SWA as the CPC??? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
yes-i know,but otherwise there is no reason why they can't be paralleled is there? on pme
If you are exporting PME earthing out to an outbuilding that HAS extraneous metalwork (=<22000ohms between metalwork and main earth terminal) and you are intending to use the armouring only as an earth conductor then for a:
TNCS system you will need 8 x the required equivalent in copper e.g 10.00 copper required = 80.00mm armouring.
TNS system you will need 4 x the required equivalent in copper.
If after installation it is found to require external CPC it should be a minimum of 25% csa of phase conductor.
"ECA guide to the wiring regs."
Reply to Can we use the armour of an SWA as the CPC??? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
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