IR testing a lighting cct with an Extractor Fan 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.

 

[Doc Hudson]

Is there no isolator switch to allow the fan to be disconnected locally for maintenance? If not, then as you say L+N to E should be sufficient, assuming readings are all good.

Doc H.

 

[markyspark76]

Test L-N to earth,test at 250v first if all clear do same again at 500v

 

[freedomrun]

What about the wording on the EIC, would would be best to write down do you think if i can only test LN to E.

 

[says-les]

Yes

 

[tom1]

if all testing is done at L+N to earth then in the scedual of item tested, i tick the box insulation resistance between live conductors and earth and put N/A in insulation resistance between live conductors.

in test results I just put L+N - E >299 ect

 

[SPECIAL LOCATION]

What about the wording on the EIC, would would be best to write down do you think if i can only test LN to E.

There a numerous occasions on a CU change where it is not practical to remove all equipment vulnerable to testing, or neon