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Grounded bar terminal screws #77361
05/24/01 07:58 PM
05/24/01 07:58 PM
B
binky178  Offline OP
Junior Member
Joined: May 2001
Posts: 1
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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Re: Grounded bar terminal screws #77362
05/24/01 08:40 PM
05/24/01 08:40 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,360
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
05/24/01 11:29 PM
sparky66wv  Offline
Member
Joined: Nov 2000
Posts: 2,236
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...

-Virgil


-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI
Re: Grounded bar terminal screws #77364
05/24/01 11:43 PM
05/24/01 11:43 PM
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,902
NY, USA
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

Re: Grounded bar terminal screws #77365
05/25/01 12:10 AM
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
05/25/01 08:25 AM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
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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