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 01-20-2012, 05:51 PM   #1
Member
 
Join Date: Apr 2008
Location: NJ
Posts: 433
Share |
Default

Duct Seal on Rear Meter Pan Knockout?


We're in the process of putting in a meter pan for underground service at my house. The electrical inspector reccommended that we use a rear knockout for the service entrance. I was under the impression I should use a protective bushing or something on the knockout, but the guy at the supply house said most people use duct seal. Can anyone confirm this practice?

benjamincall is offline   Reply With Quote
Old 01-20-2012, 06:07 PM   #2
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,417
Default

Duct Seal on Rear Meter Pan Knockout?


You are going to need to use a cable or conduit connector and a bushing.

The duct seal would stop the flow of air through the conduit, if used.

__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
Old 01-20-2012, 06:16 PM   #3
Member
 
Join Date: Apr 2008
Location: NJ
Posts: 433
Default

Duct Seal on Rear Meter Pan Knockout?


Quote:
Originally Posted by Jim Port View Post
You are going to need to use a cable or conduit connector and a bushing.

The duct seal would stop the flow of air through the conduit, if used.
I think the guy was saying that people just lined the sharp edge of the rear knockout with duct seal.

So, I would use a clamp-type connector for the 4/0 SEU running out the rear knockout?
benjamincall is offline   Reply With Quote
Old 01-20-2012, 06:33 PM   #4
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,417
Default

Duct Seal on Rear Meter Pan Knockout?


Yes, you need a connector for the SE-U.
__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
Old 01-20-2012, 06:39 PM   #5
Member
 
Join Date: Apr 2008
Location: NJ
Posts: 433
Default

Duct Seal on Rear Meter Pan Knockout?


Thanks! Most service entrances I see use a conduit body. I was a little unclear what I should do based on the graphic below:
Attached Thumbnails
Duct Seal on Rear Meter Pan Knockout?-meter-pan.jpg  

Last edited by benjamincall; 01-20-2012 at 07:03 PM.
benjamincall is offline   Reply With Quote
Old 01-20-2012, 06:42 PM   #6
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,417
Default

Duct Seal on Rear Meter Pan Knockout?


How does the cable run after leaving the socket? Where is the panel in relationship to the socket?
__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
Old 01-20-2012, 06:46 PM   #7
Member
 
Join Date: Apr 2008
Location: NJ
Posts: 433
Default

Duct Seal on Rear Meter Pan Knockout?


Quote:
Originally Posted by Jim Port View Post
How does the cable run after leaving the socket? Where is the panel in relationship to the socket?
Panel is within about four feet, down in the basement, and on a perpendicular wall. The inspector considers this location as close as practically possible, and won't require conduit. The SE-U will go down a stud cavity, through the bottom plate, and along the rim joist.

Last edited by benjamincall; 01-20-2012 at 06:49 PM.
benjamincall is offline   Reply With Quote
Old 01-20-2012, 06:52 PM   #8
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,417
Default

Duct Seal on Rear Meter Pan Knockout?


I might consider exiting the bottom of the socket and down and turn into the rim joist.
__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
The Following User Says Thank You to Jim Port For This Useful Post:
benjamincall (01-20-2012)
Old 01-20-2012, 07:34 PM   #9
retired elect/hvac/plumb
 
plummen's Avatar
 
Join Date: Jan 2010
Location: south east of omaha/The island of misfit contractors
Posts: 2,889
Default

Duct Seal on Rear Meter Pan Knockout?


Quote:
Originally Posted by benjamincall View Post
Panel is within about four feet, down in the basement, and on a perpendicular wall. The inspector considers this location as close as practically possible, and won't require conduit. The SE-U will go down a stud cavity, through the bottom plate, and along the rim joist.
I personally would say that inspector is nuts and run it in conduit anyway!
All it takes is 1 stray nail down the road when then area has been covered and forgotten to cause a world of problems,and there wont be nothing to protect it from happening.
Not to mention there wont be any way to minimize the damage or shut it down like a home run going through the joist since theres no breaker involved.
plummen is offline   Reply With Quote
Old 01-20-2012, 08:32 PM   #10
Member
 
Join Date: Apr 2008
Location: NJ
Posts: 433
Default

Duct Seal on Rear Meter Pan Knockout?


Quote:
Originally Posted by plummen View Post
Not to mention there wont be any way to minimize the damage or shut it down like a home run going through the joist since theres no breaker involved.
I'll just leave a pictorial guide of how to pull the meter for the next owner.
benjamincall is offline   Reply With Quote
Old 01-24-2012, 10:40 AM   #11
Member
 
Join Date: Apr 2008
Location: NJ
Posts: 433
Default

Duct Seal on Rear Meter Pan Knockout?


To the original question, what type of protection does one typically use on the the rear knockouts of a meter pan when not running conduit? A terminal adapter with a lock nut and a protective bushing or a clamp style connector?

http://www.amazon.com/Cantex-5140108.../dp/B000BQURZG

http://www.amazon.com/Morris-Product...7421951&sr=1-3
benjamincall is offline   Reply With Quote
Old 01-24-2012, 11:34 AM   #12
Electrician
 
SD515's Avatar
 
Join Date: Aug 2008
Location: Near Jackson Michigan Area
Posts: 1,450
Default

Duct Seal on Rear Meter Pan Knockout?


A SE clamp and a bushing if you’re running SE cable out of it. You can’t just line the raw-metal hole with duct seal. You need the clamp to protect and secure the cable.
__________________
Kyle

Just because you can, doesn't always mean you should
SD515 is offline   Reply With Quote
Old 01-24-2012, 11:39 AM   #13
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,417
Default

Duct Seal on Rear Meter Pan Knockout?


That male terminal adapter is for use with PVC conduit.
__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
The Following User Says Thank You to Jim Port For This Useful Post:
SD515 (01-24-2012)
Old 01-24-2012, 03:59 PM   #14
Member
 
Join Date: Apr 2008
Location: NJ
Posts: 433
Default

Duct Seal on Rear Meter Pan Knockout?


Quote:
Originally Posted by Jim Port View Post
I might consider exiting the bottom of the socket and down and turn into the rim joist.
Since the conduit is not underground (wet location), I should be OK placing the SE-U in conduit, correct?
benjamincall is offline   Reply With Quote
Old 01-24-2012, 05:07 PM   #15
Electrical Contractor
 
rrolleston's Avatar
 
Join Date: Oct 2011
Location: Granville, NY
Posts: 1,941
Send a message via AIM to rrolleston Send a message via Yahoo to rrolleston
Default

Duct Seal on Rear Meter Pan Knockout?


I would also put the wire in conduit from the meter socket to the breaker panel. And make sure you put an expansion joint on the pipe going from the ground to the meter socket. It's 20 bucks well spent and required in some areas.

rrolleston 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
?an Insulated Flexible Duct - half attached and half unattached ? tran Roofing/Siding 2 06-21-2012 06:25 PM
Is My Electric Meter Correct: Conclusion. fcfcfc Electrical 0 10-03-2010 06:00 PM
Tiny elbows on meter? pcampbell HVAC 24 10-06-2009 09:54 AM
Water meter aggravations KE2KB Plumbing 8 03-21-2009 06:53 AM
Frozen water meter stubborn1 Plumbing 5 01-26-2009 06:35 AM




Top of Page | View New Posts

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