Grounding resistence

[Smartchoice]

Am I missing something?
I ve been fighting this battle for years.
A customer keeps telling me I have to measure resistance to ground in the panel(main ground conductor), I say for consistency I need a proceedure, they come back with use the clamp meter, hanging the clamp on the ground wire. My arguement is that the clamp does not measure resistance(only the probes) so any readings they ve picked up are false.
Am I wrong?

 

[timhoward]

Sounds correct to me, as far as I know you can only measure current flowing to earth under fault conditions with a clamp meter.
You really need a dedicated earth loop tester. I don't know what people use in Vancouver but here in the UK we generally have multi-function testers which include this functionality. Separate loop testers are also available.

 

[Megawatt]

Am I missing something?
I ve been fighting this battle for years.
A customer keeps telling me I have to measure resistance to ground in the panel(main ground conductor), I say for consistency I need a proceedure, they come back with use the clamp meter, hanging the clamp on the ground wire. My arguement is that the clamp does not measure resistance(only the probes) so any readings they ve picked up are false.
Am I wrong?

As far as reading resistance we have started using 2 ground rods to get the resistance that we need and it’s not a requirement that we actually need to measure resistance but we are looking for 23 ohms or less