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09-23-2009, 04:42 PM
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#1
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Registered User
Trade:
Electrical Contractor
Join Date: Sep 2009
Posts: 6
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commercial T Bar lighting, 12/2 or 14/2 ?
Somebody told me it is permissible by code to use 14/2 on a 20 amp circuit in a commercial building. Is this true?
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09-23-2009, 04:44 PM
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#2
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Pro
Trade:
Remodeling general
Join Date: Feb 2009
Location: Annapolis Md
Posts: 1,512
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Quote:
Originally Posted by BTE
Somebody told me it is permissible by code to use 14/2 on a 20 amp circuit in a commercial building. Is this true?
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You are an electrician?
What does the NEC say?
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09-23-2009, 04:52 PM
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#3
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New Guy
Trade:
Electrical
Join Date: Sep 2009
Posts: 25
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Hey, if you find the code rule that allows that let me know ..... it'll save me alot of money
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09-23-2009, 04:54 PM
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#4
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Pro
Trade:
GC/Remodeling
Join Date: Sep 2007
Location: Central America (Kansas)
Posts: 623
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...
__________________
Quote:
Originally Posted by jeremy-lvhm
...just stop it. go sit down and have a lollipop and think about what your saying.  |
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09-23-2009, 04:58 PM
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#5
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Electron Flow Manipulator
Trade:
Electrons for cash
Join Date: Jan 2009
Location: Iowa
Posts: 1,443
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Quote:
Originally Posted by naptown CR
You are an electrician?........
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He must be.... that's what his profile says.
__________________
Age is just a number but mine is unlisted.
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09-23-2009, 07:28 PM
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#6
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woodchuck2
Trade:
Electrical Contractor&Home Maintenance
Join Date: Feb 2008
Location: Chestertown, NY/Lower Adirondacks
Posts: 1,020
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I bet they told you to use Aluminum wire too 
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06 Chevy D-Max RCLB, 8' Fisher plow, 98 Sumitomo mini excavator, 96 7k 16' Phoenix car trailer, 06 12K 18' Cam-Superline equipment trailer
04 7k 6'X10' Kristi dump trailer, 07 7k 7X14 Continental V-nose enclosed trailer
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09-23-2009, 08:23 PM
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#7
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Pro
Trade:
Licensed Electrical Contractor and Remodeler
Join Date: Sep 2009
Location: Chicago Suburbs
Posts: 711
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There are some quirky things in the NEC regarding derating, but I have never seen any exceptions like that ESPECIALLY in commercial application. At least he asked instead of just doing it unlike what we see on jobsites everyday. I respect someone who is willing to consult with colleagues instead of taking the cheap way out.
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09-23-2009, 08:25 PM
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#8
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Fentoozler
Trade:
Professional Pie and Pastry Taster
Join Date: May 2007
Location: New Jersey
Posts: 5,589
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What do the job specs call for?
__________________
The UD is quite possibly man kinds finest accomplishment.
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09-23-2009, 08:40 PM
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#9
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God Bless America
Trade:
Electrician
Join Date: Dec 2006
Location: Rahway, New Jersey
Posts: 3,400
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Quote:
Originally Posted by BTE
Somebody told me it is permissible by code to use 14/2 on a 20 amp circuit in a commercial building. Is this true?
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If someone told you you were an idiot would you believe them?
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09-23-2009, 08:43 PM
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#10
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Pro
Trade:
Licensed Electrical Contractor and Remodeler
Join Date: Sep 2009
Location: Chicago Suburbs
Posts: 711
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I only found this website a few days ago and am addicted to it. However, I hope that the real reason we are all here is to honestly share knowledge and help each other out when we are having a brain f@rt. I for one have been given lot's of misinformation from people who "heard from someone who is an expert" one thing or another.
The next time I am stumped on what to do, I intend to consult with you guys first. I hope you will give me a little crap because it's fun, but I also hope that you will help me with useful advice too.
I have had a couple slow weeks recently, and am impressed with the encouragement that the posters provide to each other in all areas from marketing to technical advice.
This is not directed at DIY's, hacks, unlicensed tradesman, non-work comp and GL insurance carriers, and others who make those of us who pay our dues lower our prices to compete. But to the rest of you, Thanks
Last edited by rselectric1; 09-23-2009 at 08:48 PM.
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09-23-2009, 09:09 PM
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#11
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Electron Flow Manipulator
Trade:
Electrons for cash
Join Date: Jan 2009
Location: Iowa
Posts: 1,443
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There are certain installations in commercial apps that 14 can legally be protected by a 20a breaker. Lighting is not one of them.
__________________
Age is just a number but mine is unlisted.
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09-23-2009, 09:23 PM
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#12
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Fentoozler
Trade:
Professional Pie and Pastry Taster
Join Date: May 2007
Location: New Jersey
Posts: 5,589
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Quote:
Originally Posted by rselectric1
I hope you will give me a little crap because it's fun.....
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I, for one, promise that I will never ever give you any crap.
It takes a humble man to ask a question on an open forum.
I totally respect that.
BTW, I'm also a pathological liar.
__________________
The UD is quite possibly man kinds finest accomplishment.
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09-23-2009, 09:34 PM
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#13
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Capra aegagrus
Trade:
Remodeler
Join Date: Jan 2008
Location: Central Pennsylvania
Posts: 1,892
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Quote:
Originally Posted by 480sparky
There are certain installations in commercial apps that 14 can legally be protected by a 20a breaker. Lighting is not one of them.
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<humble mode> Such as? </humble mode>
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09-23-2009, 10:29 PM
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#14
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Fentoozler
Trade:
Professional Pie and Pastry Taster
Join Date: May 2007
Location: New Jersey
Posts: 5,589
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Quote:
Originally Posted by Tinstaafl
<humble mode> Such as? </humble mode>
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AC circuits is one......
"Air-conditioning and refrigerating equipment, branch-circuit conductor sizing" to be exact.
EDIT:
Although what the NEC mandates as "minimum" can be altered by job specs to something that is above "minimum".
__________________
The UD is quite possibly man kinds finest accomplishment.
Last edited by Celtic; 09-23-2009 at 10:33 PM.
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09-23-2009, 11:07 PM
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#15
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Registered User
Trade:
Electrical Contractor
Join Date: Sep 2009
Posts: 6
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I love it! Test the waters and you get all sorts of elevated discourse. Or in your case, Woodbutt2 and I just got off boat in Texas 120Sparky, elevated flatulence. Put out the bait and they'll take it every time.
Fools!
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09-23-2009, 11:15 PM
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#16
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Electron Flow Manipulator
Trade:
Electrons for cash
Join Date: Jan 2009
Location: Iowa
Posts: 1,443
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Quote:
Originally Posted by Tinstaafl
<humble mode> Such as? </humble mode>
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Just check out Table 240.3.
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Age is just a number but mine is unlisted.
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09-23-2009, 11:24 PM
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#17
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Home Depot aisle walker
Trade:
home remodeling
Join Date: Mar 2009
Location: Tulsa OK
Posts: 906
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I do stuff that makes me sleep well at night. I dont think 14 would.
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09-24-2009, 05:33 AM
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#18
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Electrical Contractor
Trade:
Electrical
Join Date: Sep 2003
Location: NY State
Posts: 1,952
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Quote:
Originally Posted by BTE
I love it! Test the waters and you get all sorts of elevated discourse. Or in your case, Woodbutt2 and I just got off boat in Texas 120Sparky, elevated flatulence. Put out the bait and they'll take it every time.
Fools!
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At least you come right out and admit you are a troll. Pretty ballsy after only 6 posts. 
What did you expect? Come on here with " Electrical Contractor" in your profile and ask a question like this starting with the dreaded " Someone told me..."?
What did you think would happen?
__________________
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09-24-2009, 08:21 AM
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#19
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woodchuck2
Trade:
Electrical Contractor&Home Maintenance
Join Date: Feb 2008
Location: Chestertown, NY/Lower Adirondacks
Posts: 1,020
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X2, you might better have asked if you could run used wire for the circuit and asked how much we would charge to do it. I myself dont have all the answers and i prefer to do some research before asking anyone anything. If you here just to be a PITA then you should expect the answers you got and will get in future threads unless you post a sensible question with good information.
__________________
06 Chevy D-Max ECSB, 8' Fisher plow, 6' Salty Dogg in bed sander,
06 Chevy D-Max RCLB, 8' Fisher plow, 98 Sumitomo mini excavator, 96 7k 16' Phoenix car trailer, 06 12K 18' Cam-Superline equipment trailer
04 7k 6'X10' Kristi dump trailer, 07 7k 7X14 Continental V-nose enclosed trailer
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09-24-2009, 05:09 PM
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#20
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ampman
Trade:
providing pathways for electrons and protons
Join Date: Apr 2009
Location: central florida
Posts: 733
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Quote:
Originally Posted by BTE
I love it! Test the waters and you get all sorts of elevated discourse. Or in your case, Woodbutt2 and I just got off boat in Texas 120Sparky, elevated flatulence. Put out the bait and they'll take it every time.
Fools!
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you are now the laughing stock of the forum
__________________
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