Afci breaker trips immediately when a light is turned on has several possibilities.
1. Light dome has a flourescent bulb/w ballast
2. Neutral to ground short at the light fixture wiring.
3. Phase to ground or phase to neutral short
4. If nm cable used too metal ceiling fan box a metal nm clamp may be tightened too much damaging the insulation of the wire(s) causing short.
5.) Shared neutral at the home run electrical box .. bed room is served by a multiwire branch circuit containing too hots and shared neutral. A cable like 14/3 with ground being used to operate the bedroom receptacles and lights.
6.) Possible nail through cable on ceiling fan switch leg
1. I would have to check on the lighting. I don't believe this to be the case. It has three smaller bulbs on it.
2. I double checked all connections and made sure the wires were not near each other.
5. No shared neutral for sure. Single circuit. It is 14-2. Home run to receptacle, pigtailed connections to next 5 receptacles, to a single gang box to a ceiling fan.
6. I fished this wire into the wall. Possible that I may have stapled too tight in the attic.
Any other ideas? If it were a bad connection at any of the receptacles, would it trip the breaker if the switch was off? What is the best way to troubleshoot this? Got a baby due in a month and the wife may be pissed if this room, the nursery, doesn't have lighting :furious: