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

 

[L1Jay1]

Have you got an RCD warning label to read?
If not, look it up in the regs. or on line, even.

I was asking if the RCDs are switched to the off position during insulation resistance test, as I know they are sensitive equipment.
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you don't remove for a continuity test. but without removing all loads, you can't do a L-N IR test.

On IR test can u just switch RCDs off or do u actually have to dis them.

 

[L1Jay1]

I was asking if the RCDs are switched to the off position during insulation resistance test, as I know they are sensitive equipment.
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On IR test can u just switch RCDs off or do u actually have to dis them.

Disconnect them it was meant to say
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I was asking if the RCDs are switched to the off position during insulation resistance test, as I know they are sensitive equipment.
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On IR test can u just switch RCDs off or do u actually have to dis them.

Sorry disconnect them , my post was meant to say.

 

[gazdkw82]

I believe you are correct. I thought it was Zs that had to be proved at every point but yes, I believe it is continuity of cpc at every point.

A Zs wouldn't confirm a cpc is present or that it is a acceptable condition or terminated sufficiently

 

[davesparks]

I believe you are correct. I thought it was Zs that had to be proved at every point but yes, I believe it is continuity of cpc at every point.

A Zs wouldn't confirm a cpc is present or that it is a acceptable condition or terminated sufficiently

You can't carry out Zs until the installation is energised, and you can't safely energise an installation without proving the correct connection of the protective conductor at every point.
This is why the continuity of the protective conductor is tested first.

 

[gazdkw82]

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

You can't carry out Zs until the installation is energised, and you can't safely energise an installation without proving the correct connection of the protective conductor at every point.
This is why the continuity of the protective conductor is tested first.

Yes exactly. Hence why I realised my mistaken thoughts

 

[telectrix]

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.

and if we are correcting posts, it's R1 and R2. not r1 and r2.

 

[gazdkw82]

and if we are correcting posts, it's R1 and R2. not r1 and r2.

Absolutely spot on. Lazy on my part ?