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#77361 - 05/24/01 04:58 PM Grounded bar terminal screws
binky178 Offline
Junior Member

Registered: 05/24/01
Posts: 1
Loc: covington
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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#77362 - 05/24/01 05:40 PM Re: Grounded bar terminal screws
sparky Offline
Member

Registered: 10/18/00
Posts: 5545
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.

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#77363 - 05/24/01 08:29 PM Re: Grounded bar terminal screws
sparky66wv Offline
Member

Registered: 11/17/00
Posts: 2342
Loc: West Virginia
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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#77364 - 05/24/01 08:43 PM Re: Grounded bar terminal screws
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: NY, USA
Binky,

Welcome!
You could both be right. (how's that for diplomacy? ) 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

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#77365 - 05/24/01 09:10 PM Re: Grounded bar terminal screws
Anonymous
Unregistered


Be careful if the conductors need to be the same gage and solid before being paired under a screw.

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#77366 - 05/25/01 05:25 AM Re: Grounded bar terminal screws
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
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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