I pulled lap screws and cut foam insulation for 4 hours this afternoon. Big truck mechanic shop I wired last summer (125’x300’x24’ big) and they decided to screw signs to the outside walls today to mark bay numbers. The shop foreman called me and said he has no lights so I’m thinking they screwed into a switch leg and killed the lighting contactor. Well, they did get the switch leg (there are 12 switches, btw), but they also found 5 of my light circuits and a 6/2 for a welder. I ran out of 4 sq boxes.