evnow said:
LEAFer said:
It's an "inductor" issue. You're creating an inductance and heat associated therewith. When tightly coiled and improperly stored while carrying a large current a heat build up could cause a fire.
Hmmm ... no. Only noticeable heating that happens here would be because of resistance. Eddy currents, if any, would be too small.
Well, inductance is a type of resistance (magnetic field). You are concentrating the fields in a tight coil and creating self-inductance with losses (creating heat) proportional to the number of loops and inversely proportional to the diameter of the coil. I don't have a PhD in this, and so my explanation may be slightly off. But the bottom line is ... a fire can result. See
HERE for just one example (googling will find many more).