ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Violation?
by renosteinke - 01/27/23 09:52 PM
Does NEC 551.71 (F) apply to dwellings?
by BigB - 01/20/23 10:46 AM
Power submeter connections
by HotLine1 - 01/19/23 09:09 AM
AFDD's coming to the UK
by Texas_Ranger - 01/17/23 07:22 PM
New in the Gallery:
Burger King crown sillyness
Burger King crown sillyness
by wa2ise, December 11
240/208 to a house
240/208 to a house
by wa2ise, October 9
Who's Online Now
0 members (), 30 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#87075 01/16/04 07:59 PM
Joined: Jan 2003
Posts: 1,429
L
LK Offline OP
Member
Can you put 4 - 1/0 in a 2" LB ?

Stay up to Code with the Latest NEC:


2020 NEC & Related Reference & Study Guides
2020 NEC & Related Reference & Study Guides
Pass Your Exam the FIRST TIME with these Exam Prep Combos:
 

>> Master Electrician Exam Prep     >> JourneyMan Electrician Exam Prep
 

#87076 01/16/04 08:54 PM
Joined: Mar 2003
Posts: 92
G
Member
Look in the inside of the LB for max wire size and number

#87077 01/16/04 10:01 PM
Joined: Jan 2003
Posts: 1,429
L
LK Offline OP
Member
Max wire size is 4/0 as in all 2" LB's however max fill notes not more than 3 conductors, it seams for conductors over #4 three is the limit, fittings are not the same fill as conduit. This would prevent using 2" LB for 3PH Service LB.

[This message has been edited by LK (edited 01-16-2004).]

#87078 01/17/04 07:55 PM
Joined: Jan 2004
Posts: 91
R
Member
you could always use a larger lb with reducing ends.

#87079 01/17/04 08:46 PM
Joined: Feb 2003
Posts: 169
R
Member
314.28 Pull and Junction Boxes and Conduit bodies.(A)(2) would require more than a standard LB. It usually requires a mogul LB.

#87080 01/17/04 09:00 PM
Joined: Jan 2003
Posts: 1,429
L
LK Offline OP
Member
Russ,
You got it, I posted for one of my guys, He said there is nothing wrong with using a regular LB, he din't get a mogul because the supply house din't stock them, and if they had to order, it would cost more. I stopped the job and refuse to let them use the regular LB. Their answer is, we see everyone else use them, and is the inspector going to ask you to tear down the job. I don't want to take that chance.
Rizer,
The larger LB with a reducer will not meet the requirements of 314.28(A)(1), it is still to short in length. Only the Mogul LB will do it.

[This message has been edited by LK (edited 01-17-2004).]

#87081 01/18/04 10:53 AM
Joined: Dec 2000
Posts: 4,291
Member
LK,
Max 4/0, as with all 2" LBs?
I think you'd be better off to follow gserve's instruction, and look in the inside of the LB.
From the OZ/Gedney catalog:
LB-200A = Max 3 #4/0 AWG, (aluminum for rigid)
LB-67 = Max 3 #1/0 AWG, (a Form 7 LB)

I regularly see the use of 2" Appleton LB's (aluminum) Max 2/0 with 3/0 wire on 200 Amp circuits...S

[This message has been edited by electure (edited 01-18-2004).]

#87082 01/18/04 01:18 PM
Joined: Jan 2003
Posts: 1,429
L
LK Offline OP
Member
Electure,
Max 4/0, as with all 2" LBs? is the comment from one of my guys, that asked me to post this, He had a carlon LB 2" J type that has 4/0 stamped inside. He now knows that all LB's are not equal. style and type for different applications. They forget bending space and fill requirements when it comes to LB's. Yes you will see this violation many times.


[This message has been edited by LK (edited 01-18-2004).]

#87083 01/18/04 04:41 PM
Joined: Dec 2000
Posts: 4,291
Member
Sorry and no offense, LK
I guess I didn't quite understand.
Another way to accomplish this (LB) in certain circumstances is to use a section of wireway with the required distance between conduit entry points. They're sure a lot less expensive, and more easily available than the mogul conduit bodies...S



[This message has been edited by electure (edited 01-18-2004).]

#87084 01/18/04 09:13 PM
Joined: Jan 2003
Posts: 1,429
L
LK Offline OP
Member
electure,
We are doing a 200A 3 phase system next week, and I am using a box on the inside of the building, basement area, if I can find one with the proper gauge for service conductors. Still using mogul outside, you can guess what a 2-1/2" mogul LB costs. By the way, one of the guys called today and said he wanted to thank me for giving him the chance to be an electrician.

[This message has been edited by LK (edited 01-18-2004).]


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
 
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Samurai
Samurai
Fl.
Posts: 46
Joined: May 2007
Top Posters(30 Days)
BigB 8
triple 3
Popular Topics(Views)
302,641 Are you busy
231,940 Re: Forum
216,590 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5