I've a home made extension lead on an old cable drum. I always 'loop' the lead, so there's an equal amount wound in each direction. Apart from making it less likely to twist and tangle, won't it make it less likely to heat up due to eddy currents?
On a training course at ex-military accomodation in the '60s, the bedrooms were freezing. I took a 2Kw electric fire with me and managed to wire it into a 2A plug (one 2A socket was all that was in each bedroom). Nothing blew and it was the most popular brdroom in the block!
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