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Cecil Moore[_2_] · September 4th 08, 12:25 AM posted to rec.radio.amateur.antenna

wrote:
So that means I get 0 volts when I touch one side of the 120V in my
electrical service to the 120V other side? I was afraid I might see
240V.

If those signals are equal in amplitude and 180 degrees out
of phase, it means they are *differential*, you will see 240v,
and you had better not short them together. OTOH, if they are
common-mode signals, they are in-phase and you can short them
together to your heart's content - no current will flow.

Again, you seem to have the IEEE definitions of "differential"
and "common-mode" exactly reversed in your head.
--
73, Cecil http://www.w5dxp.com