I’ve recently gone to the push-in buss connectors to clean up multi-switch boxes.
I wish they would introduce the European buss connectors I’ve seen that use screws to secure the wires but that’s for another thread.
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I do not like the push in buss connectors. When I was working for a department store chain they were used in remodels. I lost count of the vallance lights that quit working because the push in connectors made poor contact. I took to cutting them out and wire nutting.
Now the ones with the screws, oh yes those are great.
I found that I had to test each connection before felt comfortable with them. It’s the same spring-spade connection system used in switches. So far I just use them for light circuits which is usually the place you end up with 3 and 4 wire connections. I don’t like wire-nutting 4 or more wires so I end up daisy chaining them which turns into a space issue. AFAIK the push-in terminals should be taped just as wire nuts are taped.
If they sell those in the states feel free to post a site.
Wirenut technique, IMHO:
If you know how to make a proper wirenut joint there’s no purpose in taping. And if you have the right sizes of wirenuts for the splices you’re making, there’s no advantage to any other kind of connector, until you get up to at least AWG 8 (bigger than most DIY projects will involve). Unless you’re tying stranded conductors to solids, a wirenut should basically be serving as an insulating cap–not actually holding the conductors together mechanically–though it should still be cranked very tight. Any group of small solid conductors, or any group of small stranded, can be twisted together (with pliers) tight enough to hold itself–then you put a nut on it. If you need tape to cover exposed metal below the wirenut, you need to trim your splice down, or crank your wirenut tighter, or both. If you need tape just to keep your wirenuts from falling off when the wires are moved around, then you can’t crank hard enough to do good electrical work.
The reality of twist connectors is that they come loose from twisting and stuffing the wires back into boxes. They are not like a nut on a bolt that has multiple turns before it comes off. A twist connector is conical and is ALWAYS susceptible to a 1/4 turn removal. I tape them because I learned the value of safety wiring parts on aircraft. It prevents parts from loosening for any reason. I tape them and than fold the end of the tape over for easy removal.