While renovating my kitchen I want to run inside the walls the wires for some security detectors. I understand I need 22 gauge 4 wire for the rate-of-rise and carbon monoxide detectors. But looking online I see I have a choice of solid or stranded. And shielded or not. For the one 500' roll that I would need to buy the prices are close enough that price isn't the issue.
I would also run a wire for the door contact. It only needs 2 wire, but I don't want to buy another roll when 500' is more than enough for all three devices.
Don.