On 03/05/2014 06:17 PM, Oren wrote:
On Wed, 05 Mar 2014 17:50:15 -0600, philo wrote:

I'm stumped too. Clamp-on meters measure the field in /one/ wire.

If you put a clamp on meter over both wires since current in = current
out the sum total would be zero.

+1

Doesn't the magnetic field around the cord expand and contract around
AC current vs DC current? Meaning measure a single wire conductor.

(I want a good book recommendation for beginners)



I have no book recommendation but I found this

http://en.wikipedia.org/wiki/Current_clamp


When I first started my job I was issued the "Columbia" type clamp-on
meter as shown in the photo. (I still have it) It was later replaced by
a hall effect device.


I still recall how amazing it was when I got my first digital meter