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Grounded bar terminal screws #77361 05/24/01 07:58 PM
Joined: May 2001
Posts: 1
B
binky178 Offline OP
Junior Member
My friend and I have been discussing(arguing) about how many wires can be under a screw according to code. He thinks two but I remember hearing or seeing a change that said you were only allowed one. Would appreciate some help on this one and the code section it's in.

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Re: Grounded bar terminal screws #77362 05/24/01 08:40 PM
Joined: Oct 2000
Posts: 5,389
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sparky Offline
Member
Hi binky178 !
I would have to say 110-3, as this would be a listing/rating Q.
I'm sure others can comment on this here.
[Linked Image]

Re: Grounded bar terminal screws #77363 05/24/01 11:29 PM
Joined: Nov 2000
Posts: 2,236
sparky66wv Offline
Member
GE, Cutler-Hammer and Murray Residential Load Centers allow 2 #12 Conductors in each lug, at least in the panels I've bought. It would be a listing/labeling thing as far as I'm aware... Not sure about Sq D...

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Re: Grounded bar terminal screws #77364 05/24/01 11:43 PM
Joined: Oct 2000
Posts: 3,961
Bill Addiss Offline
Member
Binky,

Welcome!
You could both be right. (how's that for diplomacy? [Linked Image] ) The answer would be one unless specifically allowed by the listing/labelling info that went with that piece of equipment. I thought I saw once that some panels would allow up to 3 grounds per terminal. Not sure about that though.

Bill


Bill
Re: Grounded bar terminal screws #77365 05/25/01 12:10 AM
A
Anonymous
Unregistered
Be careful if the conductors need to be the same gage and solid before being paired under a screw.

Re: Grounded bar terminal screws #77366 05/25/01 08:25 AM
Joined: Mar 2001
Posts: 2,056
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Redsy Offline
Member
Most load centers have this info. on a sticker inside the enclosure door.Typically, 2 ground wires of the same size, but only one neutral. How many times have we seen(and done) the neutral and its ground in the same bus hole. Probably a violation. Breakers, also. The set screw type typically accomdate only one. Some of the others (Square D) have a pressure plate under the screw head that will take one wire on each side of the screw. As far as wiring devices, one screw, one wire.


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