Of course I didn't have my camera with me, but during a service call to a house, I found an L/B nippled into the meter pan, the pipe went into the attic to a juntion box. It was a 20-40, 200amp murry panel, with about 16 spaces left, as long as you got twin breakers. But someone added a sub-panel next to it and tapped off the line side.(using #6 thhn doubling under the feeder lugs of the main breaker.