Insulation Resistance test question?

[LittleHelper]

Hi guys,
I have what may seem a basic question.
If a cable has been skinned at some point along the circuit would an IR test pick that up in the readings?

Many thanks

 

[westward10]

What do you mean by skinned, the sheath, insulation or both.

 

[static zap]

Rodent damage ?

 

[KEV 1 N]

No, unless it’s touching another cable (if also damaged, exposing copper) or earthed metal containment.

 

[Octopus]

Why the question? College work?

 

[LittleHelper]

Thanks for response guys. The main reason for the question was I got into an debate with someone at work as I was doing an IR test and the meter was climbing slowly but climbing never the less. He said there is a fault on the newly installed circuit where a cable may have been nicked/burned when pulling them in ( was effortless to run no chance of burning). I said to him more than likely the environment we are in is a little damp & cold and the plastering has recently been done so residue moisture in the air and at terminations may be making the meter climb slowly. Which I still believe to be the case. Also there are no loads as we are at the beginning of second fix of accessories for a load reading to be causing test effect. The meter is in good order and I have retested a length of cable with perfect results. We powered up the circuit and it held fine with rcbo in place. but he believes there is a fault.


Thanks again for feedback guys!!

 

[Des 56]

I tend to agree with what "you know" is more than likely LH

 

[KEV 1 N]

What sort of cable was it?

 

[LittleHelper]

T&E KEV 1 N

 

[KEV 1 N]

What was the highest reading?