Man that wiring the previous owned did would have me pretty worried. What size circuit does he have that 10 wire on?
I agree. The stair 3way light is on a 15a breaker. This circuit was overloaded and I realized it about a month after I bought the house. She had the vacuum going and I had the microwave going. Guess what... the breaker tripped!
There were a few receptacles in the living room, the garage door opener, kitchen lights (5 x 50 watt max cans), outside front and back lights, and the microwave was all on this 15a circuit.
Since then I went over the entire house, check all the wiring, and made the necessary corrections. I ran a dedicated 20a line for the microwave and put the garage door on its own 15a line to the sub-panel in the garage.
My kitchen has 3 dedicated 20a counter receptacles.
Frig and dishwasher are on their own circuits.
Whole house fan is on its own circuit.
Bathroom light/fan/heater/ combo is on its own circuit.
Here is my 30 slot 200a panel after I cleaned it up.
(some of that white romex is older 12-2 wire)
My plans down the line is to upgrade to a 40 slot 200a service panel, and use copper from the power company bugs, into the meter box and meter box to the panel. I already have the copper SE cable.