The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Sprinklered equipment 26-008
by bigpapa
Yesterday at 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
Earthquake in New Zeeland
by RODALCO
11/27/16 11:25 PM
Calling all Non-US members!! (Non-US only)
by Tjia1981
11/27/16 06:33 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 15
HotLine1 10
Trumpy 8
Texas_Ranger 8
sparkyinak 7
Who's Online
1 registered (gfretwell), 194 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#35458 - 03/11/04 04:15 PM Wire Gauge
LK Offline

Member

Registered: 01/21/03
Posts: 1721
Loc: New Jersey
When installing drop in 4X4 fixtures, what is the proper support wire gauge.

"Wire, chain or threaded rod of sufficient strength to carry the fixture."

[This message has been edited by LK (edited 03-11-2004).]

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#35459 - 03/11/04 05:57 PM Re: Wire Gauge
hbiss Offline
Member

Registered: 12/16/03
Posts: 893
Loc: Hawthorne, NY USA
Certainly most chain you are apt to use or threaded rod (if anybody uses threaded rod for this) would carry the load. You usually use the same wire as supports the ceiling. Even so, since you support diagonal corners or all four corners (depending on local code) you can usually use something like 18ga steel tie wire if the length is not too great.

-Hal
_________________________
www.myphonetechs.com

Top
#35460 - 03/11/04 06:09 PM Re: Wire Gauge
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6804
Loc: Brick, NJ USA
LK:

Support of lay-in fixtures is NOT an NEC requirement, it may be local (siesmic/building/mechanical/fire.)

As to the gauge, with my EC hat on, we use the same wire that the ceiling guy uses. If it's a quantity job, I have the ceiling contractor drop 2 for me, and pay him. I find this is a 'good move', especially in a building with a high roof deck. The $$ is well worth it.

On small jobs, we get 'ceiling wire' from either Jaeger Lumber, or an Ace Hardware.

John
_________________________
John

Top
#35461 - 03/11/04 06:10 PM Re: Wire Gauge
Ryan_J Offline
Moderator

Registered: 08/19/03
Posts: 1355
Loc: West Jordan, Utah, USA
It depends what siesmic design category you are in. Where are you located?

Here in Utah, we are in "seismic design category D2" which means we have to install ceiling grids (and the lights attached to them) in accordance with the CISCA 3-4 Standard. If I remember right, the CISCA requires #12, but don't quote me on that part.
_________________________
Ryan Jackson,
Salt Lake City

Top
#35462 - 03/11/04 07:00 PM Re: Wire Gauge
Attic Rat Offline
Member

Registered: 12/14/03
Posts: 530
Loc: Bergen Co.,N.J. USA
... Yep, Ryan,...it's #12 gauge,steel,or galvanized,...guy wire..I only know cuz I had to install troffers with that..as well as drive screws thru the casing to the T-bar grid...
AR
_________________________
.."if it ain't fixed,don't break it...call a Licensed Electrician"

Top
#35463 - 03/11/04 07:10 PM Re: Wire Gauge
Ryan_J Offline
Moderator

Registered: 08/19/03
Posts: 1355
Loc: West Jordan, Utah, USA
Attic Rat: Every time I read your profile I laugh aloud. You must be a fun guy to drink a beer with.
_________________________
Ryan Jackson,
Salt Lake City

Top
#35464 - 03/11/04 07:57 PM Re: Wire Gauge
LK Offline

Member

Registered: 01/21/03
Posts: 1721
Loc: New Jersey
The reason for the gauge question, is while checking a job today, the building inspector was there, and he handed the owner a completion ticket for the ceiling, well we had temp. wire #18 holding the fixtures until the 12ga was installed. I was wondering how it passed with the 18ga., I am still continuing with the 12ga. that we always use.

Top
#35465 - 03/12/04 01:31 AM Re: Wire Gauge
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
Here in MA we are required by the MEC (MA Elec Code) to do the diagonal support thing with or without attachment to the grid itself.

We use the 12 AWG ceiling wire and we own all the tools a ceiling guy does, ramset on a pole, 15' tek screw drivers etc along with an open acount at a cieling supply place.

We did have an inspector refuse the 12 AWG steel wire and had us use 12 AWG Jack chain.


This is foolish as a 12 steel ceiling wire will support my weight a 12 jack chain will not come close to holding me up.

Had to re support almost 1000 fixtures, GRRRRRR!

It turned out to be an local ordnance that we could not get out of.
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals