ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Permit Snafus...AHJs and Contractors Jump in
by sparky. 04/29/17 05:59 PM
201 volt equipment?
by bigpapa. 04/29/17 12:15 AM
Schneider LC1D09
by jraef. 04/28/17 11:05 PM
Electrode boilers question
by annemarie1. 04/27/17 01:40 PM
Why cables look like they do
by LongRunner. 04/26/17 09:36 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,988 Are you busy
169,827 Re: Forum
163,024 Need opinion
Who's Online Now
0 registered members (), 46 guests, and 16 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#86812 - 12/14/03 04:07 PM Subpanel with out a main?  
Edward  Offline
Member
Joined: Dec 2002
Posts: 308
California
Can i install a double pole 100Amp breaker into a 125Amp main lug 24circuit panel and call it the main disconnect for that subpanel?
Please give NEC sections.


edward


Thanks
Edward

2017 / 2014 NEC & Related Books and Study Guides

#86813 - 12/14/03 06:14 PM Re: Subpanel with out a main?  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
408.16(F) permits this type of installation.


#86814 - 12/14/03 06:52 PM Re: Subpanel with out a main?  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
You need to make sure the loadcenter is listed for using a back-fed main breaker and if so they often will only permit it in a specific location which is designed to accept the required hold down kit. This information should be on the label. Many newer loadcenters are designed to accept main breaker kits that mount in place of the main lugs.

Curt


Curt Swartz

#86815 - 12/14/03 09:35 PM Re: Subpanel with out a main?  
Edward  Offline
Member
Joined: Dec 2002
Posts: 308
California
Thanks for the reply.
Can i back feed the busbars with a 100Amp breaker and call that the main? Or it has to be a kit that goes in the place of the main lugs?

Edward


Thanks
Edward

#86816 - 12/15/03 01:18 AM Re: Subpanel with out a main?  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
Yes, you can back feed a breaker in the loadcenter if the instructions on the loadcenter say you can. You are required to secure the back fed breaker so you must purchase a hold down kit that fits the breaker and loadcenter. The hold down kits often will only fit in the one designated position in the loadcenter. If there are provisions to replace the main lugs with a main breaker that is usually the better way to go. Many Square D and GE loadcenters have main breaker kits to replace the main lugs.

Curt


Curt Swartz

#86817 - 12/15/03 12:41 PM Re: Subpanel with out a main?  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA



Member Spotlight
Admin
Admin
NY, USA
Posts: 3,439
Joined: October 2000
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.013s Queries: 14 (0.002s) Memory: 0.7751 MB (Peak: 0.9185 MB) Zlib enabled. Server Time: 2017-04-30 09:08:47 UTC