For the re-wiring I did in my basement we used the push-in connectors for a
junction box. They worked very well especially given the large number of
wires we had to connect together. But what's the word on the street, my
friend who recommended them says that a lot of old-timer electricians don't
trust them, but that the journeymen that he works with love them because
they make their job so much easier. I thought it was great, strip the wire,
push the wire in the hole, wire's locked into place.
fast but can flake out over time:( If they are in and working I would
just remember where they are. someday when something quits check its
likely the cause.
I have some here that never caused a problem although one flaked about
a year ago......
better are the push in wires tighten screws, they are really dependable
you? For those I've heard plenty of people complain that those are fire
hazards. For switches and outlets the screw down type you mentioned below
are definitely recommended over stab-loc.
I'm talking about these things
Just so that we're on the same page and all that.
I believe that one of the major fire alarm suppliers uses those, or
something very similar to them, for low voltage connections having to do
with auxiliary relays for a duct detector. So apparently they can be
reliable, at least reliable enough to be UL listed for fire alarm use.
That said, I do trust a good old fashioned terminal strip with screws on
it a lot more. I also never use the push in connectors on a receptacle,
heard enough stories about those...
replace "fly" with "com" to reply.
What do you call the "stab in & screw down" type termination on switches and
outlets? Has the speed of stablock and the reliability of a clamped down
How does this work???
What I'd like to see are fixtures that don't require a box... Strip the
wire, lay it in a channel in the back of the fixture, screw it down tight,
repeat for other wires, flip over the wire channel cover.
I note that they're both UL and CSA approved.
I'll also note that push in terminals on outlets are also (still)
approved by UL and CSA, and all of the device connection failures
I've _ever_ seen were push-in. Most of them with aluminum wire
(where push-in has never been legal), but still, some were
When it comes right down to it, given the right tools/workmanship
for installing on screw terminals or wirenuts, push-in doesn't really
save you much. And I _much_ prefer the higher clamp pressure and
solidity of a screw termination or a good solid wirenut.
For screw terminals my wire stripper has a strategically placed hole
that makes making a small loop at the wire end very easy. A pair of
needle nose pliers works in a pinch.
The proper set of linesman pliers makes quick work of doing the
twists for wirenuts. Some wirenuts are rated _without_ pretwisting.
Note that these devices aren't intended for stranded wire. Only
Age and Treachery will Triumph over Youth and Skill
next "aluminum wire back stab connector" of the next century. I don't know
the history of aluminum wire or back stab connectors but it seems like they
probably received the same approval before everyone found out just how bad
There's something to be said for twisting wires together, then feeling how
tight and secure they are under a wire nut. Only time will tell how well
these new devices hold up. There are certainly enough problems with spring
clips in outlets and switches becoming loose
Read the instructions on the box -- I don't know of any decent,
and currently available brands which say pretwisting is necessary.
Actually, when wire connectors are used properly, the wires will twist
together internally, even if not pretwisted. (Follow the directions
come with the connectors or call the mfr. for details.)
While I do pretwist, especially
when connecting 4 or more wires, it's better not to pretwist than to
pretwist wrong. It's easy to end up with 1 wire almost straight and
several others wrapped barber-pole style around it. This is not proper
Not always, it depends on the design of the wire nut.
Here is a brief excerpt from an Ideal Industries wep page. They are
one of the oldest and biggest manufactures of wire nuts (I believe
they have the trade mark on the name)
* Five Color-coded models accept from #22 to #8 AWG wire
* Fixed, Square-wire spring
* No pre-twisting required
* UL Listed and CSA Certified
* Shell rated for 105° C
* Flame-retardant polypropelene shell
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