I am renovating a 1903 house with a Pushmatic box.
A breaker that controls three ceiling lights has tripped several times. Most of the time, I discover this when the house is empty and few to no electrical items are in use.
The ceiling lights are new and have the right wattage of light bulbs. An electrician inspected the contractor's installation.
The house has a variety of wiring: knob and tube and at least two generations of Romex.
Any clue what's happening? Thanks!