Published: 3 May 2011
Category: Q&A
Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This Question of the Day, concerning use of the armour of a power cable as its earthing conductor, is answered by the ECA:
Question: Is it possible to use armour of a power cable as its earthing conductor?
As an example - for 4 x 240mm cable, is it necessary to install separate earthing cable? Or is the armour of the cable enough for earthing?
What is required by BS standards?
Answer: If the calculations in accordance with BS 7671:2008 are satisfactory using the circuit protective conductor (CPC), then, yes you may use the SWA of the cable as the CPC.
In this case, it is not necessary to provide separate CPC.
To see many more Q & A in Voltimum UK's Experts Area, please click on the link:
www.voltimum.co.uk/consult.php?universe=consult.index.questions