I recently installed 6 porcelain pull-chain lights in my attic. I first ran a new romex wire from an existing double receptacle in the attic to the first porcelain light. From there, I wired in "series" to each of the five in the run. By this I mean running a wire into a ceiling box, attaching it to the light, then the next romex run is attached to the light and run out of the box, an so on. When finished, I turned the breaker back on, and put light bulbs (100W) in each of the six new lights. I turned on the wall switch (the receptacle from which the lights get their current was already wired to the wall switch), and everything works fine. I cleaned up my tools, turned off the switch, and put away my tools. When I went back upstairs and decided to go back in the attic, I turned on the same wall switch, and the lights will not turn on. :confused:
I tested the circuits with a tester that reads through the romex. Every wire is showing current, each porcelain socket is showing current. The existing receptacle and its lead from a junction box show current. That junction box is fed by a BX-cabled, two wire feed. The ground wires in all the new Romex are connected to each other in the series circuit. The ground wire leading from the junction box is touching the metal junction box where the BX feeds. All the other receptacles on the same circuit breaker are working fine.
What could be the problem here? Why would the lights come on and make me think I've done the right job, and then go off? :(