UK Testing

[L1Jay1]

On a continuity test on existing lighting circuit, do all bulbs have to be removed, what if there is to many or some can’t be reached.
Trainee Electrician

 

[telectrix]

you don't remove for a continuity test. but without removing all loads, you can't do a L-N IR test.

 

[L1Jay1]

you don't remove for a continuity test. but without removing all loads, you can't do a L-N IR test.

Are you saying u don’t have to remove bulbs when testing for earth continuity.

 

[telectrix]

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.

 

[L1Jay1]

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.

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 test

 

[telectrix]

its just that in college, they said lamps should be remved for R1 R2 test

ask them why.

 

[Midwest]

its just that in college, they said lamps should be remved for R1 R2 test

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.

 

[L1Jay1]

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.

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 .

 

[gazdkw82]

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.

 

[Risteard]

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.

Actually, during initial verification cpc continuity must be verified at all points.