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What earthing arrangement is this?
Former Community Member
The supply is from a private transformer in a four core cable 3ph + n. The cable armour is earthed and connected to the MET. However there is also a green and yellow cable connected to the neutral terminal at the main isolator going back to a the transformer casing. The transformer is only 5 or 6 metres away. I think this must have been intended to make it a tncs supply but seems to me to just create parallel neutral conductors. Or is it tn-s-c-s? I have only been able to go off visual inspection because I could not disconnect the supply..
Agreed on the TT aspect, the logic from that came about from the earth rods...
no alternative supply here, just the 11kV ring main
I do rather wish I had some decent qualification in this area, would be a good thing to have in my job I think. Not to mention that I find it all very interesting
Agreed on the TT aspect, the logic from that came about from the earth rods...
no alternative supply here, just the 11kV ring main
I do rather wish I had some decent qualification in this area, would be a good thing to have in my job I think. Not to mention that I find it all very interesting
