Discuss ZS testing in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

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Hi, I,ve got my City and Guilds 2391 but have done little "hands on" testing till now.
When ZS testing, eg a fluorescent lighting circuit, and testing at furthermost light fitting, is it OK if fluorescent light fittings are switched on when the test is being carried out ? I don,t think the vulnerable components in the fitting would be damaged by the test current but would like to be sure. It would be impractical to disconnect all the fittings from this circuit.
Thanks in advance,
Wullie
 
a Zs test would be OK with fittings connected, but for IR test, if you can't dis. them short L/N and test to cpc @250v. ( soft test. )
 
but, in a real situation, the protective device relies on the circuit Zs with all loads connected. admiitedly, it is better to disconnect loads for testing purposes, but sometimes impractical. suppose a house has several floodlights outside, 15 ft. up. would you go round removing all the lamps? i certainly wouldn't.
 
I agrees with him above, seems to know what hes talking about and yes in real life you prob wouldnt disco everything but if you follow testing procedures then prior during your Ir testing most thinks will of been disconnected anyways.
 
no damage when performing Zs test. IR test is a different kettle of sardines.
 

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