IR Testing lighting cct with fixed bathroom extractor load

[freedomrun]

Domestic CU change, TN-C-S. Lighting circuit has an Extractor Fan with Electronic timer installed. When performing IR test on the lighting, should i just test the whole lighting cct between L & N (connected together) and the CPC - I do not want to remove the cover of the extractor to disconnect at the terminals as i may damage the plastic housing. If i do the IR test in this way, should i make a note of it on the EIC - i am concerned that i should be testing between all conductors seperately when changing the CU and recording the results accordingly. Any advice please.

 

[tony mc]

IMO If you are unable to disconnect the fan then test as you have mentioned and make a note on the EIC .

Regards

 

[telectrix]

test L and N (shorted together) to E, first at 250V, then at 500V. do not test across L /N. as you rightly say, damage could be caused.