I bought a new single-bulb light fixture. It's going in a small animal cage, so the wall plug comes in through the ceiling of the cage. I connected white to white, black to black, and green to a green grounding screw in the fixture. When I plugged it in and switched it on, the light worked but withing a half-second there was a pop and the ground wire blew off. The light stayed on and works. My questions:
1) What did I do wrong? I'm admittedly a real newbie on this.
2) Is it at all unsafe to keep running it now?
3) My first guess is that maybe some of the live wire (black or white) touched the ground? I have them all wound up in plastic wire connectors, but they are admittedly pretty close together where they come out of the plug. Is that a possible cause, and if so, would it be safe to strip some more of the green wire coming from the wall plug, connect that to the ground screw, and try again?
4) Am I about to electrocute myself and/or start a fire and therefore should cease and desist?