ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
VFD MotorFeeders
by gfretwell. 10/19/17 01:02 AM
Generator Cable Sizing
by brsele. 10/18/17 07:39 PM
What do you do?
by gfretwell. 10/17/17 01:08 AM
Good ol' copper pipe in the fuse holder trick
by HotLine1. 10/16/17 07:16 PM
Another generator question
by HotLine1. 10/16/17 07:02 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
241,404 Are you busy
177,370 Re: Forum
168,973 Need opinion
Who's Online Now
0 registered members (), 14 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#77361 - 05/24/01 07:58 PM Grounded bar terminal screws  
binky178  Offline
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.


2017 / 2014 NEC & Related Books and Study Guides

#77362 - 05/24/01 08:40 PM Re: Grounded bar terminal screws  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,311
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]


#77363 - 05/24/01 11:29 PM Re: Grounded bar terminal screws  
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

#77364 - 05/24/01 11:43 PM Re: Grounded bar terminal screws  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
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


#77365 - 05/25/01 12:10 AM 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.


#77366 - 05/25/01 08:25 AM Re: Grounded bar terminal screws  
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.



Member Spotlight
Bill Addiss
Bill Addiss
NY, USA
Posts: 3,878
Joined: October 2000
Show All Member Profiles 
Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.014s Queries: 14 (0.004s) Memory: 0.7746 MB (Peak: 0.9207 MB) Zlib enabled. Server Time: 2017-10-20 07:14:54 UTC