IR Testing RCBOs

[adonoghue1985]

Hi all, got c.u full of rcbos for my upcoming assessment in Jan.

My question is can I remove the cables from from the terminations of the rcbo to test for Ir and still keep the assessor happy?

The reason I'm asking is because:
1) the probe from my fluke won't reach far enough into the live terminal to test (wylex rcbo).
2) am I correct in thinking that because rcbos are single pole anyway so a reading would be taken through the rcbo via the neutral as its not isolated so can't test at 250v.

Any ideas guys.

 

[HandySparks]

If you're IR testing a final circuit, pull the L and N out of the RCBO but leave the CPC in the earth bar. Then it's easy to connect your meter and you won't damage the RCBO.

 

[telectrix]

agreed. don't go puttring 500V.dc on the RCBO. they don't like it up 'em, mr. mainwaring.

 

[adonoghue1985]

Don't PANIC...

Cheers guys

 

[ipf]

agreed. don't go puttring 500V.dc on the RCBO. they don't like it up 'em, mr. mainwaring.

Lives just down the road from me.

 

[MDJ]

My question is can I remove the cables from from the terminations of the rcbo to test for Ir and still keep the assessor happy?



.

:38:

I hope for your sake I am not your accessor when the time comes, My god, Give me strength :frown2:

 

[Octopus]

So tell me, how did you test the CU when you installed the RCBO's - I mean you DID test them didn't you??

 

[dim_bulb]

Use a long uninsulated screwdriver to reach terminal and crocodile clip onto that
only advice

 

[Thomas123]

So tell me, how did you test the CU when you installed the RCBO's - I mean you DID test them didn't you??

he did, its call the bang test.

 

[telectrix]

and what's wrong with the bang test. it worked fine for donkeys years before some pratt invented digital test instruments. :81:

 

[adonoghue1985]

In reply to previous posts yes I did test by removing the cables from the terminations. I was asking due to the fact that in GN3 all cables need to be terminated prior to testing that was all.

 

[moddeydhoo]

Most rcbos have a resister inside (not f&g) so to protect the rcbo remove cables

 

[tony mc]

I would not expect the assessor will ask you to IR every cct.

When he/she asks you to carry out any tests fully explain what you are doing and in the case of the RCBO re IR testing refer back to GN 3 re testing voltage sensitive equipment and explain why you are removing the line & neutral conductors prior to the test !

 

[SirKit Breaker]

In reply to previous posts yes I did test by removing the cables from the terminations. I was asking due to the fact that in GN3 all cables need to be terminated prior to testing that was all.

GN3 is exactly what it says it is, A GUIDANCE NOTE. Common sense and manufacturers instructions come first. The RCBO manufacturers instructions will say something along the lines of DO NOT INSULATION RESISTANCE TEST.

Cheers..........Howard