Glowing Coil Terminal

cudascott said

It's the current not the voltage making it glow. Powering a 12 volt coil with 6 volts doubles the current draw.

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At this point I have no idea what the OP is doing, but I can guarantee you this.........doubling the voltage and current through the coil IS NOT going to cause a no 8 or 10 machine stud to "glow"