Robert Morein wrote:
snip

Bret, the above is the explanation for the definition and cause of hum
loops. It's not "too complicated"; it is simply the essence of the problem.
I'm not against your advocacy of balanced power, but an intelligent
discussion requires a real understanding of ALL the causes of spurious
currents in interconnects. The explanation I gave is subject to challenge,
but please do not dismiss it with hand waving.

It's certainly not incorrect and I am not attacking it. But any time
you can avoid algebra it's a good idea to do so unless you are actually
trying to achieve a mathematical result. Usually, it's better to
communicate a process intuitively first and then give the math.
Especially to a non technical audience, of which this is certainly one.


Good grounding is senior to the issue of balanced or unbalanced power,
and good grounding is certainly possible under the current NEC.