Discuss Can't seem to find the answer, 18th edition tommorow ; ) in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

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I have at no time suggested the value of k should be 143.
What I have said, is the value of k for single core cables is 143 and that the tables 54.2 through to 54.5 can be used for both live conductors and protective conductors.

We had already established that the value for k to be used in the question was 115, before you posted.
 
I'm sorry, I believe you are wrong tables 54.2 - 54.5 clearly state - Values of k for 'protective conductor' in the relevant heading for whatever form it may take, conduit, trunking, armour etc.
I do not believe the tables should be used for 'live' conductors, which is why table 43.1 is in the book.
I'm surprised no one else has waded in with their two penny worth!
I think we can agree to disagree on this one!
 

Reply to Can't seem to find the answer, 18th edition tommorow ; ) in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

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