I paid a guy to come in and put a gfci receptacle using the electric wire that goes to a super old (lighted but non-working) medicine cabinet. The medicine cabinet is ugly and I planned to replace it when I found something (unlighted) I liked. I asked him to disconnect the ugly thing. Well, today I removed the screws and pulled and the damn thing still has a connection going to it. Can I just cut that (after flipping the circuit breaker) and then make sure the wires won't short out? I'm assuming that it's the last thing on the circuit, or was, as it only has the wires going in, not out. The lights didn't operate by a wall switch, but by a button on the side of it. Thanks in advance!
You can cut it if you disconnect the next hop on that circuit that feeds it. Perfectly legal to leave "dead wire" in walls. You would find the outlet or fixture that feeds it, disconnect that side of the wiring from the fixture. Cap it or push it out of the box (I would cap it in case you change your mind). That's it.