Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 05-05-2012, 10:38 PM   #1
Member
 
Join Date: Mar 2012
Location: North Carolina
Posts: 31
Rewards Points: 25
Default

Connecting LB to Breaker Panel


I am bringing SE cable from meter box into a breaker panel via a 2" LB. The neck of the LB that will extend into the wall cavity is 1 1/16" long (internal depth for receiving PVC is 1 3/16"). The siding and sheathing is approximately 1" thick and there is approximately 1/4" of "dead space" between the sheathing and the back of the breaker panel. This leaves 3/16" between the end of the LB nipple and the back of the breaker panel it will be entering.

My original thoughts were to use a 2" male adapter to come into the back of the breaker panel. However, the "female/unthreaded" section of the male apapter is 1 3/8" in length (external) and 1 1/4" internal for receiving 2" conduit. So the 1 1/16" (LB neck length) + 1 3/8" (Male Adapter length) = 2 7/16". This is 1 3/16" longer than the total amount of space between the back side of the breaker panel and the back side of the 2" LB.

If I were to attempt to remove 1 3/16" from the receptacle of the male adapter, I would be removing all but 1/16" up to the internal stop so there would be practically nothing left to receive a 2" PVC stub to connect to the LB.

Would it be acceptable/recommended to remove 19/32" from both the neck of the LB and the receptacle of the male adapter and use a short PVC stub just long enough to connect the two without being exposed (roughly 19/32" + 21/32" = 1 1/4")?

If so, I could then use a nut to lock the male adapter to the breaker panel.

If there is a better way to do this, I am very much open to suggestions.

Thanks,

Ted

tedallen is offline   Reply With Quote
Old 05-06-2012, 06:49 AM   #2
Master Electrician
 
Join Date: Mar 2010
Location: Indiana
Posts: 2,894
Rewards Points: 2,044
Default

Connecting LB to Breaker Panel


Quote:
Originally Posted by tedallen View Post
I am bringing SE cable from meter box into a breaker panel via a 2" LB. The neck of the LB that will extend into the wall cavity is 1 1/16" long (internal depth for receiving PVC is 1 3/16"). The siding and sheathing is approximately 1" thick and there is approximately 1/4" of "dead space" between the sheathing and the back of the breaker panel. This leaves 3/16" between the end of the LB nipple and the back of the breaker panel it will be entering.

My original thoughts were to use a 2" male adapter to come into the back of the breaker panel. However, the "female/unthreaded" section of the male apapter is 1 3/8" in length (external) and 1 1/4" internal for receiving 2" conduit. So the 1 1/16" (LB neck length) + 1 3/8" (Male Adapter length) = 2 7/16". This is 1 3/16" longer than the total amount of space between the back side of the breaker panel and the back side of the 2" LB.

If I were to attempt to remove 1 3/16" from the receptacle of the male adapter, I would be removing all but 1/16" up to the internal stop so there would be practically nothing left to receive a 2" PVC stub to connect to the LB.

Would it be acceptable/recommended to remove 19/32" from both the neck of the LB and the receptacle of the male adapter and use a short PVC stub just long enough to connect the two without being exposed (roughly 19/32" + 21/32" = 1 1/4")?

If so, I could then use a nut to lock the male adapter to the breaker panel.

If there is a better way to do this, I am very much open to suggestions.

Thanks,

Ted
Consider using a 2" box adapter if it will work in your situation. A box adapter is a fitting with a flange that is inserted through the panel and then cemented directly into the fitting(LB) on the other side of the panel.


http://www.google.com/url?sa=t&rct=j...02wmk6fJkjFkWw


Last edited by brric; 05-06-2012 at 06:53 AM.
brric is online now   Reply With Quote
The Following 3 Users Say Thank You to brric For This Useful Post:
Code05 (05-06-2012), NJMarine (05-06-2012), Ravenworks (05-06-2012)
Old 05-06-2012, 07:06 AM   #3
Member
 
Code05's Avatar
 
Join Date: May 2009
Location: Easton MD
Posts: 1,841
Rewards Points: 1,000
Default

Connecting LB to Breaker Panel


Quote:
Originally Posted by brric View Post
Consider using a 2" box adapter if it will work in your situation. A box adapter is a fitting with a flange that is inserted through the panel and then cemented directly into the fitting(LB) on the other side of the panel.


http://www.google.com/url?sa=t&rct=j&q=pvc%20box%20adapter&source=web&cd =5&ved=0CLoBEBYwBA&url=http%3A%2F%2Fwww.ridgelinep ipe.com%2Fliterature%2FE-344%2520Junction%2520Box-Adapter%2520Data%2520Sheet%2520(10.08).pdf&ei=omWm T8vnLMfAtweY0MiCCA&usg=AFQjCNGtp60QUl0e2jvl02wmk6f JkjFkWw
Those work great.
Code05 is offline   Reply With Quote
Old 05-06-2012, 07:48 AM   #4
Licensed Electrical Cont.
 
Speedy Petey's Avatar
 
Join Date: Feb 2004
Location: NY State
Posts: 6,858
Rewards Points: 2,020
Default

Connecting LB to Breaker Panel


WHY are you running SE cable in conduit?
__________________
Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.
Answers based on the 2008 & 2011 NEC.
Speedy Petey is offline   Reply With Quote
The Following User Says Thank You to Speedy Petey For This Useful Post:
Jim Port (05-06-2012)
Old 05-06-2012, 11:00 AM   #5
Member
 
Join Date: Mar 2012
Location: North Carolina
Posts: 31
Rewards Points: 25
Default

Connecting LB to Breaker Panel


Quote:
Originally Posted by brric View Post
Consider using a 2" box adapter if it will work in your situation. A box adapter is a fitting with a flange that is inserted through the panel and then cemented directly into the fitting(LB) on the other side of the panel.


http://www.google.com/url?sa=t&rct=j...02wmk6fJkjFkWw
I should have mentioned that I had a box adapter as an option. The main reason for trying to use a male adapter instead was for ease of disassembly if ever required.

Thanks,

Ted
tedallen is offline   Reply With Quote
Old 05-06-2012, 11:26 AM   #6
Member
 
Join Date: Mar 2012
Location: North Carolina
Posts: 31
Rewards Points: 25
Default

Connecting LB to Breaker Panel


Quote:
Originally Posted by Speedy Petey View Post
WHY are you running SE cable in conduit?
Maybe I am using the wrong name for it. These are two individual insulated 4/0 aluminum wires (one solid black insulator, one black with red tracer) and an unshielded aluminum for neutral coming out the side knockout of a meter enclosure and into the wall cavity via an LB.

According to the AHJ, since these conductors are not contained within a sheath (such as SEU) they must be protected by a conduit all the way into the breaker panel.

Best Regards,

Ted

tedallen is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Circuit Breaker Panel Height? helpless handyman Electrical 25 02-24-2014 03:06 PM
Temporarily feeding a sub panel with 10-3 30 amp breaker rrolleston Electrical 6 02-23-2012 09:40 AM
Hot water flate rate conversion to breaker panel curlycord Electrical 1 05-06-2009 07:24 PM
Outdoor breaker panel questions lhoney2 Electrical 12 07-19-2007 05:44 PM
breaker panel Ehren51 Electrical 1 01-28-2004 07:43 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.