Twisted-pair wires to reduce surges [RE-wrenches]
Windy Dankoff, Dankoff Solar
windy at dankoffsolar.com
Fri Jul 25 13:28:37 PDT 2003
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Wrenches,
I have always heard that twisted-pair wires pick up much less induced
current from nearby fields. We all see twisted-pair telephone and
other audio lines designed to reduce AC hum pickup. It seems to be
well-accepted that twisting power wires makes a circuit safer from
lightning-induced surges. R Perez reported in Home Power long ago
that twisting the lines was more effective than shielding, per his
experiments.
I don't understand the principle.
I twisted some wires together for a distance of 150 feet and it was
not easy! I could have divided it into sections and twisted it in
opposing directions in each section, which would have made it very
easy, but since I don't understand the principle, I couldn't assure
that it would be effective.
Can anyone induce some understanding into my twisted mind?
Windy
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