I looked back at some old threads and saw the discussion about push-in vs. screw terminations on receptacles, but not the twist or no-twist wire nuts. Thanks for the recap.
At risk of another international incident, I have to say that I don't much like the idea of push-in terminations, maybe because I grew up without such things here.
First time I even realized these existed was about 14 years ago. I'd not been to the U.S.A. at that time and studied your wiring in detail, but I'd ordered a lot of computer equipment from California, and rigged up a transformer to run everything on 120V. I ordered a U.S. 6-way power strip which consisted of 3 duplex 5-15 recepts. and when I looked inside it I found that these used push-in wiring.
I'm not quite sure exactly what you mean by side-wired and back-wired. Every American receptacle I've ever seen has the screw terminals on the side. Does back-wire mean the push-in type of termination?
Which one was pretwisted and which one was not? (Short or long pair)
(Don't flame me for the colors of the wires, I thought the twist would show better with the contrast...)
I used this technique on one pair of wires:
I stripped each wire 1-1/4" and pre-twisted with the lineman's pliers (my first pair... Ideal brand, not "Kleins") Then I snipped the bare twisted ends back to about 5/8" and installed the yellow WireNut by hand until I could tighten no more, then removed it...
On the other pair, I stripped 5/8" off and installed a yellow WireNut by hand three turns, then tightened it an additional 8 turns with the yellow "Ideal WireNut Wrench". Then I removed the wirenut for the photo.
Can you tell which one is which?
Please note: The pretwisted version only had three scratch lines in each wire from the WireNut spring, whereas the one done "my way" has 9 scratches where the spring grabbed. Three times as many...
Also, viewing into a light, there are voids between the wires on the pre-twisted version, none on "my way"... It's all about contact area and pressure, folks... (With a Cu to Cu connection...)
Oh yes, and if one used improper care when stripping the wire (and they "ring" it even just a little) the wires may break when done "my way"... but I've never had a wire break in many years with the way I strip wires. (Notice the only non-Ideal brand tool is the strippers... Hey I think Klein's are better... I'm not Ideal crazy!)
How about a picture and 1000 words! (sorry)
[This message has been edited by sparky66wv (edited 08-28-2001).]
-Virgil Residential/Commercial Inspector 5 Star Inspections Member IAEI