4 ms·
Doesn't coiling cables while passing increasing levels of power through them (which is exactly what's happening with new USB-C PD specs) start giving off more a
by Sinjo 4y ago
Doesn't coiling cables while passing increasing levels of power through them (which is exactly what's happening with new USB-C PD specs) start giving off more and more heat?
EDIT: Nope! See the replies.
- mlyle 4y agoNo. The amount of heat given off is just going to be I^2R, and coiling the cable doesn't increase R. If you coil it so tightly that the heat can't get out, that could be problematic, but it is not likely to be a problem with this coiling technique.
- ajb 4y agoCoiling is only relevant to magnetic fields. These cables generally have the same amount of current passing in opposite directions through different wires, so net zero.
- Sinjo 4y agoAh that makes sense! Having current in opposite directions in the two wires in the cable cancels it out. Thanks for explaining. I guess the warnings about not running loads of current through coiled cables are more to do with heat dissapation then?
- mgdlbp 4y agoCoiled extension cords are definitely a hazard at sufficiently high power, though.
- ElectricalUnion 4y agoCoiled AC extension cords.