I agree with Sparky all the way. Some people will only use 12 and that is fine. I sometimes hear the reasoning "It's safer" but somehow they can never give me a valid reason why. The money issue is a non-issue. I seriously doubt anyone uses 14 because it's cheaper. It's easier and can help with code compliance. In a 3 gang box with three 3-ways, feeds and possibly switch legs you'll be hard pressed to stay under fill with 12. Then install dimmers!!
"Anyone who has never made a mistake has never tried anything new." -Albert Einstein
Re: AWG 14 or 12 for lighting.#32377 12/21/0310:37 PM12/21/0310:37 PM
Residential - 14 Lighting, 12 receptacles. Especially in can light runs and 3 or 4 way switched legs like Speedy Petey said.
Every once in a while 14 has been used for a 15a receptacle run, but not often.
Commercial - 12 is min. in our town.
[sea story]BTW - anybody ever hear of the EC in Chicago many years ago (60's), who was installing 12 for the first and last 2-3 feet of the run, and using 14 inbetween? He was doing a lot of big apartment buildings, and apparantly (back in the day) the cost dofference was significant.
Chicago AHJ found out, and not only hit himn for the 'discovery' site, they pulled all his tickets for the previous 4-5 years, and went back and reinspected. Turns out he'd been doing it for quite a while. Penalized him for all they could under statute of limitations.
Guess the 'cost savings' wasn;t so great after all...[/sea story]
Re: AWG 14 or 12 for lighting.#32379 12/22/0307:35 PM12/22/0307:35 PM