I had a couple of outlets go out in my house. I went to change them and to my suprise I found Scotchlocks instead of wire nuts. I have been a comercial/industrial electrician for about 14 years or so and have never seen this. I do know sometimes residential wiring gets done a little half horsed so I called 3M thinking maybe this was sometimes practiced 30 years ago but of course 3M said 12 volt only. I plan to change it all out but wanted to know if anyone here has seen this before, other than automotive anyway.
One of the better ones- Electricians do it without shorts.
Those "no-box" AMP NM connectors they use in modular homes are also IDC connections. You can bury them behind the drywall according to U/L. There was a time when AMP was saying you could use them in general wiring, fished etc. The code didn't change (334.40(B)), only the marketing. It always smelled pretty fishy to any inspector I talked to. I talked to an AMP rep about it and he sent me a few. (I may still have them around here somewhere) They are not much different than the Scotch Lock in my opinion. The last time I saw an ad they were only targeting modular homes and citing 552.48(N) and similar.