Insulation resistance test help

[hightower]

Hi mate, get yourself trainee access on the forum

Yeah get what your saying all I wanted to know was could I incorporate the IR test to prove my light switches work both ways and all I get is flipping hassle

As for this quote above, IR testing doesn't prove continuity. Let's take a perfect circuit that max the IR reading out:

Switch 1 on, switch 2 off: reading >1000
Switch 1 on, switch 2 on: reading >1000
Switch 1 off, switch 2 on: reading >1000
Switch 1 off, switch 2 off: reading >1000

As you can see, you've proven the IR on each cable run but it doesn't prove any form of continuity. If there was a break in a strapper you'd still potentially get the same IR results. To prove continuity, you need to do a continuity test - there's no shortcut.

 

[Deleted member 26818]

The point of the 'global' insulation resistance test, is just a check to see if there are any issues that would require further investigation.
It will not prove continuity or polarity of lighting switches and wiring.

 

[Bradley6969]

Thanks for your help,
So basically I'm gonna test the whole consumer unit, Main switch off, all breakers on, I'm gonna put a link in the outgoing side between L+N, the 2 way lighting circuit will have both light switches turned on, then once this is done I'm going to test between link and Earth Whilst also test while flicking both 2 way light switches on and off this will prove the insulation resistance in my light circuit?
Cheers