BFL13 wrote:
DrewE wrote:
BFL13 wrote:
You have a 120v fault that is blowing that fuse, so the only thing left is that cord. It is not likely to be where the cord connects to the circuit board IMO. It is more likely to be farther out near the end where it was cut and since then it got wet out there. Perhaps now cut it way back shorter, and splice on the new bit of cord with a plug on it and try again.
The fuse is after the cord; a short in the cord would not cause the fuse to blow because the short circuit current doesn't flow through the fuse, and likewise an open or high resistance in the cord would not cause the fuse to blow because it only could reduce the current that's flowing.
So if the cord were shorted somewhere, it would blow a breaker or fuse at whatever the cord is plugged into, and not on the circuit board the cord is attached to?
Correct.
If it's a near short, such that a substantial leakage current is being conducted but not sufficient to trip the breaker or blow the fuse, then it continues unabated until something gives...maybe by catching fire. I have a nice little black spot on the cinder block wall of my basement from an old electric heater that had a not quite short due to a broken wire; it burned a hole in the metal case of the heater and blackened the wall, but never tripped the breaker as the current was evidently not over 20A. I was really glad the heater was mounted on the cinder block wall and not on a wood framed partition when I discovered that!
