ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
New fan motor for Panasonic
by HotLine1. 06/25/19 03:53 PM
Burning out of return(white) side of 120volt rec
by crselectric. 06/14/19 02:15 AM
Video door bell causing chime activation of coil
by JoeTestingEngr. 06/13/19 12:43 PM
Troubleshooting Voltage Drop Across Relay
by gfretwell. 06/09/19 11:49 AM
Apple Recalls Three-Prong Wall Plug Adapters
by Admin. 06/05/19 09:06 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 13 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Minimum gage tie wires for supporting light fixtur #213201
03/29/14 02:10 PM
03/29/14 02:10 PM
S
sparkync  Offline OP
Member
Joined: Oct 2002
Posts: 830
NC
Another question concerning supporting light fixtures in suspended ceiling independantely of the grid. I know that the code says to attach light fixtures to the grid, but the requirement for tie wires is not in there ( I can't find it anyway). I know it must be in the building code or some other code. Does anyone know the "gauge" wire that is required to support them? I've looked in the North Carolina building code online, and I can't find anything about it. I've tried the "search" on the forum here but still can't find anything. I'm thinking it's a #12 steel wire, but am not sure. Thanks again...

2017 / 2014 NEC & Related Books and Study Guides
Re: Minimum gage tie wires for supporting light fixtur [Re: sparkync] #213207
03/29/14 03:29 PM
03/29/14 03:29 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,092
Brick, NJ USA
10 or 12 ga should be OK
Check the specs if you have any for the job.

FYI, I used to have the ceiling guys install wires for me, and pay them; instead of using electricians time.

Last edited by HotLine1; 03/29/14 04:48 PM.

John
Re: Minimum gage tie wires for supporting light fixtur [Re: sparkync] #213210
03/29/14 06:17 PM
03/29/14 06:17 PM
S
sparkync  Offline OP
Member
Joined: Oct 2002
Posts: 830
NC
Thanks John. The reason I'm asking is that I think the owner was expecting to use little #17 gauge wire (it may be a little bigger, can't remember exactly what # was on the roll, but it was small. On a roll kinda of like # 10thhn wire is on)
I just wanted an official note of some kind to tell him. I'm sure I wouldn't want to be standing under one of the lights, if the ceiling fell with the kind of wire he has. Thanks
And yes, I'm going to get them to install the wires, but want to make sure they install the right ones. There's going to be a lot of them.

Re: Minimum gage tie wires for supporting light fixtur [Re: sparkync] #213212
03/29/14 06:46 PM
03/29/14 06:46 PM
G
gfretwell  Online Content

Member
Joined: Jul 2004
Posts: 9,368
Estero,Fl,usa
ASTM C 636 says #12 steel


Greg Fretwell
Re: Minimum gage tie wires for supporting light fixtur [Re: sparkync] #213214
03/29/14 07:28 PM
03/29/14 07:28 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,092
Brick, NJ USA
Greg:
Correct me if I'm wrong, but does steel wire gauge go the same as AWG; larger number smaller diameter?

And, thanks for the standard!


John
Re: Minimum gage tie wires for supporting light fixtur [Re: sparkync] #213216
03/29/14 08:04 PM
03/29/14 08:04 PM
T
Tesla  Offline
Member
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
The history of wire gauges goes back into British industrial history -- and can get involved.

The original wire standard was exclusively for steel. It was devised for it. Copper wire -- for electric use came generations later.

While not exact, #12 in steel is pretty close to #12 in copper, and so forth. #10 is bigger in cross section for both, etc.

( Over a century ago, they actually were the same sizes. Then better steels caused them to re-standardize the steel gauge somewhat. Pure copper stayed copper.)


%%%

The numbering system got started by way of the technique:

A #1 (steel) wire had been drawn through the first (largest) die.

It was then annealed.

Next it was drawn through the #2 die, the second die, and it grew longer and thinner.

It was then annealed.

And so forth.

The 'oughts' ( 2/0 ) were the first attempts at back sizing upwards.

4/0 was as big as they needed, so it stopped there.

Last edited by Tesla; 03/29/14 08:11 PM.

Tesla
Re: Minimum gage tie wires for supporting light fixtur [Re: sparkync] #213218
03/29/14 08:45 PM
03/29/14 08:45 PM
S
sparkync  Offline OP
Member
Joined: Oct 2002
Posts: 830
NC
Thanks Greg. I tried to pull up the actual document so I could reference it to the owner, but couldn't find it. I'll let him know though. I did find where North Carolina has adopted the ASTM C 636 standard back in 2006 if I read right. Thanks again... Steve


Featured:

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

 

Member Spotlight
sbi
sbi
indiana
Posts: 47
Joined: March 2008
Show All Member Profiles 
Top Posters(30 Days)
Admin 2
Khombo 2
Popular Topics(Views)
255,884 Are you busy
191,858 Re: Forum
181,623 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.021s Queries: 15 (0.005s) Memory: 0.9875 MB (Peak: 1.1398 MB) Zlib enabled. Server Time: 2019-06-27 08:23:57 UTC