hello all, i'm sorry to post this question on this ng but i don't have
> access to electrical ngs.
> my question goes like this:
> when using a clamp meter to measure current value for a single phase cable
> (the cable containing live , neutral and earth wires). when i clamp the 3
> wires (live, neutral and earth) , i don't get any results. but when i clamp
> only the live and neutral, i get the current value.
> my question is : is the earth wire preventing the reading of the current
> value? if so why??
> thx
> Hasta Luego
Your clamp on meter is reading the net current in your cable bundle. I would hope that all the current going "out" your line is returning via your neutral. ;-) Using a clamp on meter on the individual lines is the correct procedure. BTW, the earth lead should be carrying no current for properly designed equipment.