ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
UL 508A SPACING
by ale348 - 03/29/24 01:09 AM
Increasing demand factors in residential
by tortuga - 03/28/24 05:57 PM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (Scott35), 373 guests, and 12 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#77361 05/24/01 07:58 PM
Joined: May 2001
Posts: 1
B
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.

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

Joined: Oct 2000
Posts: 5,392
S
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]

Joined: Nov 2000
Posts: 2,236
Likes: 1
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...

-Virgil


-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI
Joined: Oct 2000
Posts: 4,116
Likes: 4
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
A
Anonymous
Unregistered
Be careful if the conductors need to be the same gage and solid before being paired under a screw.

Joined: Mar 2001
Posts: 2,056
R
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.


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5