I realize crimp sleeves are listed for ground connections, but I'm replacing some outlets in my '70s era house and found that uninsulated crimp sleeves, with tape, were used for creating pigtails at the outlets boxes.
the person removed insulation to expose copper 6" down one wire, and crimped the other cable/wire in the box to that.. So there are two wires in the crimp, with one wire continuing for the pigtail.
From what I understand, uninsulated crimp sleeves on hot/neutral (even with tape) like this isn't an approved method. Funny looking at it, because there are just two wires in the crimp, you can see how the wires don't touch in some...so that the crimp sleeve would carry the current, which is bad.
Made me think about the same issue with crimp sleeves on ground connections. wire to wire contact isn't guaranteed (especially with plier crimps). I would think an approved crimp connection must need wire to wire contact (like you get with a wire nut.
Anyone know if using crimp sleeves and tape on hot/nuetral was common in the '70s? I'm guessing this was just the behavior of some local electrician.
It's weird though. You would think that the ground connection needs to be as robust as any hot/nuetral connection (for instance it's sized to carry same currents nowadays)...so NEC must think it's a robust connector (crimp sleeve). so theoretically the only issue would be the taping as insulation.
-lev