I'm reconfiguring my kitchen and moving some stuff around, which necessitates moving some outlets and switches. This is my first attempt at any kind of electrical work, so finding weird things makes me nervous.
It appears that my house (built in 1905 and remodeled several times before I bought it in 2004) used to have an electric oven. It now has a gas oven and a 110V 20 amp circuit that is supposed to power the electrical part of the oven (a clock and the ignition for the burners and oven) and a microwave/hood combo.
When I took off the oven faceplate, I found a 240V box behind it with big white and black multi-stranded wires (and a ground). It appears that someone used one strand of each of the big wires and attached that to the outlet's terminal screws. Then they used wire nuts and pigtails to run normal 12/2 (w/ ground) wire up to the microwave/hood.
How should I deal with the 240V cable that runs from the breaker box to the outlet? Do I need to pull it out and replace it? Is there a way to wire nut a 240V stranded wire to a 120V wire, and is that an okay thing to do? I realize that as long as the breaker is only 120V, the wire is just bigger than it needs to be, but I worry that someone might see the 240V wire at the breaker and try connecting a 240V circuit without checking for smaller gauge wire downstream. Best I can tell, the 240V cable runs in one piece from the breaker box all the way to the outlet.