What's common practice with IR tests on lighting circuits?

[Other_Tucker]

I had just installed a heat alarm on the downstairs lighting circuit during a kitchen rewire.

The new kitchen ring / cooker circuit I tested IR for L-N and N-E at 500v, fine, but the DS lighting circuit consisted solely of 21 LED downlights, in various rooms and the alarm. All of which say do not IR/

How do you take results when this happens? or what do you fill out the EIC IR columns with? or do you not generally bother?

 

[loz2754]

Insulation resistance testing must be carried out on all new wiring, between live conductors, between line and earth, and between neutral and earth. The test voltage should be 500V.

The testing would be carried out as the wiring is installed, not just at the end when all the lights, USB sockets, smoke alarms etc have been fitted.

Finally, after all the equipment has been fitted, an insulation resistance test should be carried out between line and neutral connected together, and earth. The test voltage may be reduced to 250V.

All this information is in BS7671.

 

[Brightonbill]

Insulation resistance testing must be carried out on all new wiring, between live conductors, between line and earth, and between neutral and earth. The test voltage should be 500V.

The testing would be carried out as the wiring is installed, not just at the end when all the lights, USB sockets, smoke alarms etc have been fitted.

Finally, after all the equipment has been fitted, an insulation resistance test should be carried out between line and neutral connected together, and earth. The test voltage may be reduced to 250V.

All this information is in BS7671.

Is there anything that may skew the readings e.g. LEDs, smoke detectors, WiFi etc. when doing the combined LN to earth.

Just done an EICR in a student house and it’s impossible to remove everything. Wiring is only 5 years old, but I’m getting a reading of 30M ohm.

 

[buzzlightyear]

Start with 230v first and put it up to 500.

 

[westward10]

30 Meg is fine.