L&N-E IR Test (and we still haven't fixed the stupid 20 characters)

[hightower]

When you do a L&N-E IR test, is there anything (other than a fault) that could be left plugged in that would produce a low reading?

 

[telectrix]

surge protection?

 

[hightower]

surge protection?

I'm not asking for a particular scenario, like I'm not having issues. Just wondering if there's any predicament that could cause a L&N-E IR test to cause a low reading and stick that knowledge in the back of my head somewhere.

I guess with surge protection, it would show on a 500V test but wouldn't show (or show to the same degree) on a 250V test?

Anything else?

 

[telectrix]

IT equipment. computers are renown for having small earth leakage.typically around 3mA apiece. that's why you never put too many on a circuit with RCD protection.

 

[hightower]

IT equipment. computers are renown for having small earth leakage.typically around 3mA apiece. that's why you never put too many on a circuit with RCD protection.

See what I'm trying to understand is that the regs says it's okay to tie L&N together and test to earth when vulnerable equipment is on the circuit - so what would be the point of that if they give false results

 

[Pat H]

I had a socket outlet RCD in a RFC give me low readings. Likewise a shaver point.

 

[Octopus]

Deffo RCD's, pumps, pretty much anything....

 

[hightower]

So what's the point in doing L&N-E if you're just going to get false results still?

 

[PEG]

Always remember,that the test you describe,is a way round doing the correct,full test

 

[Octopus]

^^ otherwise known as cutting corners