insulation resistance testing

[stevo09]

Can you guys tell me. Would you normaly removed light bulbs whilst do a insulation resistance test. Also what about fittings that use transformers??

Thanks.

 

[kung]

You can test the board as a whole and cross out the bit on cert that has P-N P-E N-E and write under it P-N + E then on CU link P-N with link wire that way all bulbs trannys etc can be left in ! Sorted !
Also it is exeptable to drop test voltage to 250v for pelv/selv
Or you can remove all bulbs, plugged in equipment, fuses in fused spurs etc and do a 500v test as norm between P-N P-E N-E if no selv/pelv etc but its always good practice to do a 250v test first just in case youve left a bulb in, item plugged in, fuse left in fused spur etc.

 

[Mr Mark Sparks]

depending on the size of the insallation and number of transformers you could test l-n with the switches open and record a limitation on the cirt
as kung said try 250v first before you damage anything

 

[mikeymoo]

Whats the best procedure for interlinked smoke alarms?

 

[stretchyboy]

whip em off as they normally plug in anyway

 

[andekoch]

As was mentioned somewhere else here before just remember that the 250V on your meter is probably 250V DC so some electronic equipment will not like it anyway so be careful.

 

[ezzzekiel]

just to add, ins res teting is probally the most awkward test to perform in my opinion always get poor readings because there is something you missed still in circuit...

 

[kung]

just to add, ins res teting is probally the most awkward test to perform in my opinion always get poor readings because there is something you missed still in circuit...

Too true Ezzzekiel