"Tim Wescott" wrote in message
...

Measuring the losses could be done, but you'd have to do much more
than
just measure the current into the cord, because most of that current
is
reactive (meaning, it's from the capacitance, and doesn't actually
dissipate power).

200' of 12AWG cord didn't register on a Kill-A-Watt, i.e. it drew less
than 0.01A. Watts and VA stayed at zero too.
jsw