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 12-09-2012, 09:14 AM   #1
Member
 
Join Date: Jun 2008
Location: Melbourne, FL
Posts: 44
Rewards Points: 0
Share |
Default

Two circuits on one 2-pole breaker


I was looking at my service panel and discovered that a single 2 pole 20A breaker is being used to provide power to both a 120 v load (using a neutral) and and 240 v load without a neutral). The combined load is less than 10 amps. Is this arrangement permitted by the NEC?

czars is offline   Reply With Quote
Old 12-09-2012, 09:29 AM   #2
A "Handy Husband"
 
rjniles's Avatar
 
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 4,038
Rewards Points: 16
Default

Two circuits on one 2-pole breaker


Yes, you have a MWBC (Multi Wire Branch Circuit) with line to line (240) and line to neutral (120) load.

__________________
Location:
Coastal South Carolina
rjniles is online now   Reply With Quote
Old 12-09-2012, 09:33 AM   #3
E2 Electrician
 
stickboy1375's Avatar
 
Join Date: Apr 2012
Location: Litchfield, CT
Posts: 5,097
Rewards Points: 20
Default

Two circuits on one 2-pole breaker


Yes, done all the time, I generally do it when an air handler is 240v and I need a 120v receptacle located at the unit as well.
stickboy1375 is online now   Reply With Quote
Old 12-09-2012, 09:38 AM   #4
JOATMON
 
ddawg16's Avatar
 
Join Date: Aug 2011
Location: S. California
Posts: 7,261
Rewards Points: 46
Default

Two circuits on one 2-pole breaker


Quote:
Originally Posted by stickboy1375 View Post
Yes, done all the time, I generally do it when an air handler is 240v and I need a 120v receptacle located at the unit as well.
I like that......that way if you kill power to ether ckt....your killing both....better than have your 121 power from a different breaker.
__________________
"The dream is free but the hustle is sold separately."

My 2-Story Addition Build in Progress Link ... My Garage Build Link and My Jeep Build Link
ddawg16 is offline   Reply With Quote
Old 12-09-2012, 11:09 AM   #5
A "Handy Husband"
 
rjniles's Avatar
 
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 4,038
Rewards Points: 16
Default

Two circuits on one 2-pole breaker


Quote:
Originally Posted by stickboy1375 View Post
Yes, done all the time, I generally do it when an air handler is 240v and I need a 120v receptacle located at the unit as well.
I am not sure I would like that. You turn off the air handler and you lose power to the receptacle for lights and tools.

Unless you use a disconnect for the air handler only.
__________________
Location:
Coastal South Carolina
rjniles is online now   Reply With Quote
Old 12-09-2012, 11:47 AM   #6
E2 Electrician
 
stickboy1375's Avatar
 
Join Date: Apr 2012
Location: Litchfield, CT
Posts: 5,097
Rewards Points: 20
Default

Two circuits on one 2-pole breaker


Quote:
Originally Posted by rjniles View Post
I am not sure I would like that. You turn off the air handler and you lose power to the receptacle for lights and tools.

Unless you use a disconnect for the air handler only.
Of course a disconnect is at the AHU... and besides, money is always an issue, so that's what they get.
stickboy1375 is online now   Reply With Quote
Old 12-09-2012, 11:48 AM   #7
E2 Electrician
 
stickboy1375's Avatar
 
Join Date: Apr 2012
Location: Litchfield, CT
Posts: 5,097
Rewards Points: 20
Default

Two circuits on one 2-pole breaker


Quote:
Originally Posted by ddawg16 View Post
I like that......that way if you kill power to ether ckt....your killing both....better than have your 121 power from a different breaker.
Nope.... and I really don't care... Money is time, and time is money.

stickboy1375 is online now   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
Panel Question concerning 3 pole breaker Shinerbalk Electrical 39 07-21-2012 11:33 AM
Main Power Breaker at Service Pole Trip Continually dens1 Electrical 15 11-26-2011 09:04 AM
2 pole breaker waynebo Electrical 2 06-05-2011 11:36 AM
short circuit. reset the breaker, but no power bp91708 Electrical 10 03-18-2011 10:07 AM
Dual Pole Breaker Amperage Question jcwilshire Electrical 2 11-22-2010 12:45 PM




Top of Page | View New Posts

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