Published:
29 August 2008
Category:
Q&A
Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This Question of the Day, concerning earth loop impedance testing between phase and earth mains, is answered by the ECA:
Question: I carried out an earth loop impedance test between phase and earth mains using an earth loop impedance tester made by Megger. The value I got was three ohms. My question is: what is the minimum earth loop impedance for a domestic installation with a mains cable size of 16mm2.
Answer: The value should be checked against the tables in BS 7671 and the protective device being used.
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