I recently purchased a 5V 40A power supply that looks similar to this:
It didn't come with a power cable, so I found one that I wasn't using and stripped the side opposite the three-pronged side (the other side was a female connector that looks like what you'd plug into a computer power supply).
After stripping it, I noticed that there were three wires, each a different color:
- Green (I assumed this to be ground)
- White (I assumed this to be neutral)
- Black (I assumed this to be live)
I screwed the stripped black wire into the
L (AC) position, the stripped white wire into the stripped
N (AC) position, and the stripped green wire into the position beneath the ground symbol to the right of
I plugged the power supply into the wall, and there was a bright, blue light for a fraction of a second, and then nothing. I unplugged it immediately, waited a bit, and tried it again; however, the positions beneath
+V were not supplying any voltage, so I assumed it was dead at that point.
After waiting a bit, I opened the power supply cover and noticed that the fuse looked like it wasn't there anymore. I also noticed that the copper for the neutral and ground wires were very close to one-another, but didn't seem to be touching.
What exactly did I do wrong to cause the fuse to burn up?
Did the copper of both the neutral and ground wires being close together cause it to arc, resulting in a short?