Topic: Earth Loop Impedance Tests

As an electrician why do we not specify Earth Loop Impedance tests per pole on a regular basis ?

Its the only true way to determine if the Earth Fault Loop is sufficiently low to ensure the Fault current protection will trip.

Re: Earth Loop Impedance Tests

Brendon Tong did a lot of work on this a few years ago. If you contact Brendon directly he'll be able to share with you the results of his testing.

Although this won't actually answer your question.

I suspect the actual answer to your question is the same reason we don't do a lot of stuff - we may not have been able to technically achieve it in the past, and now we can there is no pressure to actually do it, because we've never done it...

Sean Lewis
Green Signal Consulting
sean.lewis@greensignal.co.nz
SNUG Committee Previous Chair