![]() It doesn't get X hot and stay there, if the excess energy can't be shed, then more energy just stacks on top of it until the potential is high enough that it is shedding at the same rate as it's accumulating, or else something melts.īut this is a pretty loose "coil," barely meets the definition of a coil in my book and I don't think you have anything to worry about. The cable insulation is actually rated for quite a bit more than that, so as long as you're under that then you're good.Ĭoiled-up cables can't shed the heat, and the heat is heat, not just temperature. ![]() If it's under 150F / 65C or so at the spot where the most cable layers are close together, then everything should be fine. Wait until your car has been charging for an hour or so, pulling its heaviest amps, on a very hot day. You can find a relatively inexpensive non-contact IR thermometer at Harbor Freight. How warm is a function of how much current you're pulling, how thick the conductors are, and (this is the important bit) how well the excess heat can be shed. If it does feel uncomfortably warm and easy fix would be to use bigger loops, stretching down closer to the floor, so you don't need as many loops and you don't have as many passes going over the hook.Īs far as other concerns, you can in general generate magnetic fields by putting wires in loops, but that cable has current flowing in ine direction and one wire and in the opposite direction and the other wire so there are effects cancel out and you don't gain any inductance or magnetic field generation by looping it.Ĭables can get warm when passing heavy current. So if you wanted to check and reassure yourself you could run it for half an hour of charging at the maximum rate, and then lay your hand on top of there and feel whether it feels uncomfortably warm. In your case, most of the loops are hanging pretty far from each other, and the only part that could possibly be a concern is the top where four passes of the cable go over the hook right next to each other. ![]() The real issue coiled up cords is that the heat generation is more concentrated with less air circulation, and a cable that would have had a modest temperature rise stretched out straight can have a higher temperature rise in the middle of a bundle. This is probably fine, and you're getting lots of people reassuring you about it being fine, but the reasons they are giving for it being fine, like that the wires have good insulation, don't reflect a real understanding of what the issue is with leaving cords coiled up when they are in use.
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