[rammstein]

I am at my wit's end, so I thought the collective intelligence of the OT board could help me.

I moved into an apartment and there was a light switch by the door. I flipped it and sparks shot out of the ceiling where there was a cover plate, and the circuit breaker flipped. So I inspected it, and sure enough someone had removed the existing fixture and just left bare wires. So I was going to complain to management and then it dawned on me that I could use this opportunity to install a really sweet light instead of the junky ones.

Long story short, I bought a sweet light and the installation has failed, but in strange ways. I actually installed another one and it works great, so I can't be too far off.

The light came with 3 wires- white, black, and green. The junction box in the ceiling only has white and black. So I connected black to black, white to white, and green I sandwiched in where one of the 2 screws attaching the backplate to the junction box is. I turned the light on, and it worked. Yay! But then the 3rd time I turned it on, the fuse built into the light blew. The light came with a fuse on the black wire. In case you're wondering, its 250v, 3.15A. I bought a box of 4 fuses. So now, if the light turns on, it stays on with no problem. Unfortunately, about 30% of the time when switching the light on the fuse blows. It is as if when turning the switch on, there is a brief surge of extra current draw. The circuit breaked hasn't tripped once. One experiment I tried was leaving the light switch on and turning the light on and off with the circuit breaker. Same results, about 30% of the time I'm blowing the built-in fuse.

My area of prime concern might be the green wire, which had no corresponding wire to connect to.

What are your thoughts? Is it possible that the fixture itself is defunct? Also, my multimeter won't be here until the 4th...