OK, I think I have answered this one at least 3-4 times in the last 10 years but here is my 2 cents again. Backstabbing IMHO is UL listed and labeled for #14 wire and it was UL listed for #12 years ago. When you are out there in the real world and you have to compete with others in order to get jobs and make money, you will backstab. It was and is listed and labeled so why not. Now if the GC wants to pay top dollar and is willing to go for the good stuff, then we would not backstab anything. The old proverb was,"You get what you pay for.) As for those "new type" of wirenuts that use backstabbing, I am not sure if I like them either. They will accept either solid or stranded wire. ( I believe) I found that when you use to backstab your devices, you should also give them a "tug" to make sure that they were really in there tight. I never had call backs on the devices we used, but on the othere hand, we did have to go back and fix some of the old pinback receptacles that were around.
