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Re: Terminating Stranded Wire [Re: KJay] #173213 01/05/08 12:27 PM
Joined: May 2005
Posts: 706
T
Tiger Offline
Member
I strip the wire back, leaving a short piece of insulation on the end & give it a good twist before terminating around the screw. I run mostly conduit & always pull stranded wire. Stranded wires are always easier to pull than solid. Try pulling 8 or 9 solid 12 ga. wires through a 1/2" conduit with three or four bends.

Dave

Work Gear for Electricians and the Trades
Re: Terminating Stranded Wire [Re: Tiger] #173222 01/05/08 04:34 PM
Joined: Jul 2004
Posts: 9,612
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gfretwell Offline
Member
Just because it says you CAN pull 9 #12s in 1/2" doesn't mean you should wink
I might do it for a short straight run but I am not a masochist. That is why they make 3/4" wink

I do agree stranded is easier to pull.


Greg Fretwell
Re: Terminating Stranded Wire [Re: gfretwell] #173232 01/05/08 08:29 PM
Joined: Jul 2007
Posts: 1,335
S
sparkyinak Offline
Member
Originally Posted by gfretwell
Just because it says you CAN pull 9 #12s in 1/2" doesn't mean you should wink
I might do it for a short straight run but I am not a masochist. That is why they make 3/4" wink
That is why they make wire lube. wink


"Live Awesome!" - Kevin Carosa
Re: Terminating Stranded Wire [Re: sparkyinak] #173254 01/06/08 01:10 PM
Joined: Jun 2007
Posts: 301
J
JValdes Offline
Member
In many instances you don't even have to pull stranded. I always try to push it first, if it looks possible. Only on short runs with minimal bends. When i was doing high rise condos in South Florida, we never used a fish tape in the apartments. Just pushed it all in. I have fond memeroies of those days, yound and eager. Sometimes pretty stupid too.......LOL

Re: Terminating Stranded Wire [Re: JValdes] #173292 01/07/08 12:44 AM
Joined: Sep 2004
Posts: 167
S
sandsnow Offline
Member
The allowance in the UL white book for stranded wire under a binding screw is CRAP!!!


It would be ok, if instructions were included in the instructions for the device, but there isn't any.

Above is opinion, not method of enforcement.


Larry LeVoir
Inspector
City of Irvine, CA
Re: Terminating Stranded Wire [Re: sandsnow] #173298 01/07/08 02:13 AM
Joined: Jul 2007
Posts: 1,335
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sparkyinak Offline
Member
From the UL White Pages, "RTRT Receptacles for Plugs and Attachment Plugs"

Quote
Terminals of the wire-binding screw, setscrew, or screw-actuated back wired clamping types are suitable for use with both solid and stranded building wires.

Click here For the whole speil


"Live Awesome!" - Kevin Carosa
Re: Terminating Stranded Wire [Re: sparkyinak] #173312 01/07/08 01:15 PM
Joined: Feb 2002
Posts: 114
E
electech Offline
Member
UL498 (Attachment Plugs and Receptacles) seems to refer to both stranded and solid wire for most sections, with the execption of push terminals for field wiring, which are solid only. There is a lot of "shall be wired with solid or stranded" language for the various tests. IMO, this suggests the devices should work with both, but could perhaps be lab tested in only one configuration or the other. See attached UL498 standard for reference smile

Last edited by electech; 01/07/08 01:18 PM. Reason: clarity
Re: Terminating Stranded Wire [Re: electech] #173794 01/18/08 04:48 PM
Joined: Nov 2007
Posts: 763
K
KJay Offline OP
Member
I noticed that some posters mentioned the cost and added labor of crimp terminals as prohibitive.

Just wanted to clarify that 3M and others make very affordable, high quality, non-insulated fork and ring terminals for 12 to 10-gauge wire. These are what I like to use, since there is usually no need for the expensive insulated crimp terminals in this situation. The non-insulated terminals also take up less room and make it easier to set the devices with a box that’s less than 2-1/8" deep.
Stripping and crimping can be done with the same pliers, so I feel that single pigtail installation is as fast or faster than traditional strip, counter twist, form loop, tighten, trim excess, and the connection quality should be more consistent when there are several installers with different skill levels and connection techniques working on the same job.
If you will also be doing future service work at the facility, and need to replace worn devices, I would think that the minimal initial added expense of these terminals will be offset through the savings of time necessary to repeat the above process over again for each connection on every device. eek

JMHO

Re: Terminating Stranded Wire [Re: KJay] #173795 01/18/08 04:54 PM
Joined: Jan 2003
Posts: 4,391
I
iwire Offline
Moderator
Originally Posted by KJay
These are what I like to use, since there is usually no need for the expensive insulated crimp terminals in this situation. The non-insulated terminals also take up less room and make it easier to set the devices


I would hate to see or work on the devices with uninsulated terms.

I would rather wrap the stranded.


Quote
Stripping and crimping can be done with the same pliers,


Only if those pliers are on the list of acceptable tools but the terminal manufacturer.



Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: Terminating Stranded Wire [Re: sandsnow] #173796 01/18/08 04:56 PM
Joined: Jan 2003
Posts: 4,391
I
iwire Offline
Moderator
Originally Posted by sandsnow
The allowance in the UL white book for stranded wire under a binding screw is CRAP!!!


Well I think that is bull. smile

I can make great stranded to screw connections. Every one of them is a better connection then Wagos or backstabs.



Bob Badger
Construction & Maintenance Electrician
Massachusetts
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