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Re: [LUG] Clamp-on Ammeter ?

 

Robin Cornelius wrote:
> 
> Clip on meters only work if you can get ONE conductor through the clip
> on area, eg the current only flowing in one direction, if you clip on
> a standard mains cable etc you will measure nothing as the magnetic
> field is canceled out by the pair of cables. Basicly they work on
> transformer action.

Thanks, some descriptions implied as much.

Probably not wise to  break out the conductors on the cable of interest
whilst it is live....

Guess I'll have to believe the UPS and estimate the rest.

 Simon



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