Discuss Testing in the UK Electrical Forum area at ElectriciansForums.net
Are you saying u don’t have to remove bulbs when testing for earth continuity.you don't remove for a continuity test. but without removing all loads, you can't do a L-N IR test.
no you don't need to remove. you are measuring either R2 or R1+R2. as the bulbs are connected L-N, their resistance will have no effect on your readings.
its just that in college, they said lamps should be remved for R1 R2 testno you don't need to remove. you are measuring either R2 or R1+R2. as the bulbs are connected L-N, their resistance will have no effect on your readings.
ask them why.its just that in college, they said lamps should be remved for R1 R2 test
its just that in college, they said lamps should be remved for R1 R2 test
Yeah you’re right, the tests done in college are for a new installation, looks like with a existing lighting circuit, the lamps don’t need removing .Perhaps they are teaching you how to conduct the series of tests for an installation, not just continuity. In that case, all loads would need to be removed first.
Actually, during initial verification cpc continuity must be verified at all points.During initial verification, r1+r2 or r2 needs to be confirmed at the furthest point. The only way to measure r1+r2 or r2 is physically removing the lamp/cover and gain access to the conductors.
If you are performing r1+r2 this is a good time to confirm polarity too using the light switch.
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