Testing

[Lyngarth]

Hi
Right I know how to do this test but was asked yesterday this question but was not sure of the right answer

When doing a Insulation resistance test why should the circuit be fully de-energised

Many thanks,

Lyngarth

 

[HullMarc]

Because otherwise you'd be pumping AC & DC down at the same time.

 

[Taylortwocities]

Because Insulation Resistance is a DEAD test and is carried out (with others) to test the integrity of the circuit before any voltage is applied.

Also because you'll scrog your tester - most wont let you do dead tests if the circuit is energised.

 

[Lyngarth]

Thanks for the replys. I should have known that, but will tell my mate the answer.

Cheers

Lyngarth