OP
knasher
Not certain if the Ze of 0.08 is the measured value, or reference to the given value of 0.8 for TN-S systems?
I'ts not clear from the PIR if this figure was measured or got through enquiring
Discuss Zs too high at distribution boards in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
Not certain if the Ze of 0.08 is the measured value, or reference to the given value of 0.8 for TN-S systems?
I wasn't thinking about the sinks, more along the lines of crittle windows.I want to know the reason for the high Zs before he starts stringing green/yellow to the nearest sink!
Found a bit more info from PIR guys and it includes: absence of supplementary bonding in places (been given code 1, which seems a bit bit extreme - wouldn't it be code 2?). Also, mentions poor connections on some ring final circuit patresses in certain offices. Another point mentioned is main bonding being terminated at sub distribution boards and not MET. All of these things could affect Zs couldn't they? Excuse my ignorance.
One final question for IQ electrical, can you tell me how you got your Zs figures - i've looked in GN3, OS guide and BS7671, applied rule of thumb etc but am none the wiser. Can you enlighten me. Cheers again everyone!
Reply to Zs too high at distribution boards in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
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