I've seen extension cords with cracked and leaking insullation.

Christopher A. Young
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"JIMMIE" wrote in message
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Witth no
obvious problems they willl still trip just because the wire is too
long. This is caused by capacitive coupling between the hot wire and
the ground. I dis overed this the hard way when I ran an extension
courd from my back porch to my storage shed about 60 ft away. Forgot
and rediscoverd it again when I ran 100ft of extension cord at an RV
park.

Jimmie