ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 19
Recent Posts
fuse rejectors
by NORCAL. 03/29/17 01:44 AM
Old decora style outlets
by NORCAL. 03/29/17 01:41 AM
NFPA stuff
by gfretwell. 03/28/17 08:08 PM
Anyone hiring inspectors?
by HotLine1. 03/27/17 08:03 AM
ESA Arc flash course
by TheShockDoctors. 03/24/17 10:15 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,764 Are you busy
166,658 Re: Forum
160,806 Need opinion
Who's Online Now
1 registered members (HotLine1), 65 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
Page 1 of 2 1 2
#64053 - 03/29/06 11:02 PM Need more room in Panel...  
Cinner  Offline
Joined: Dec 2004
Posts: 78
Kelowna, B.C., Canada
Does anyone know of a Square D type circuit breaker that is a side by side?....basically letting you put 2 of 15 amp breakers where usually only 1 is placed. Are they called a particular name?

Work Gear for Electricians and the Trades

#64054 - 03/29/06 11:18 PM Re: Need more room in Panel...  
BigB  Offline
Joined: Mar 2004
Posts: 719
Tucson, AZ USA
Homeline or QO? New Homeline twins are available. As far as QO, I've seen some old twins that are side by side rather than stacked, don't know if they are still made. Maybe someone else will chime in.

#64055 - 03/29/06 11:27 PM Re: Need more room in Panel...  
mahlere  Offline
Joined: Nov 2005
Posts: 507
New Jersey
they make QO tandems as well. I don't know if they are available in canada or not.

#64056 - 03/29/06 11:55 PM Re: Need more room in Panel...  
Sixer  Offline
Joined: Aug 2005
Posts: 265
Yes, the QO tandems are available in Canada.


"Will it be cheaper if I drill the holes for you?"

#64057 - 03/30/06 12:00 AM Re: Need more room in Panel...  
SolarPowered  Offline
Joined: Jul 2004
Posts: 625
Palo Alto, CA, USA
QO tandems can be had in both Class CTL and non-Class CTL versions. They aren't side-by-side, though--they're in a tandem arrangement.

#64058 - 03/30/06 12:22 AM Re: Need more room in Panel...  
macmikeman  Offline
Joined: Jul 2002
Posts: 717
Honolulu, Hawaii
I saw a tandem 14 sq-d in a bolt on panel in a resturant the other day. I was a bit suprised. I have never seen tandems in a bolt on before. Is this common? Or did somebody jury rig here. I didn't remove the panel cover, as I was there to look at something else.

#64059 - 03/30/06 12:58 AM Re: Need more room in Panel...  
caselec  Offline
Joined: Apr 2002
Posts: 558
San Jose, CA
Square D Panelboards accept both QOB (bolt on) and QO (plug on) breakers. I have been told that they recommend using QO breakers instead of QOB when adding additional breakers in the field. I can pretty much guarantee that the panelboard was not listed for tandem breakers and I’m sure the breaker used was clearly marked non-CTL for replacement use only.

BigB, what new Homline tandem breakers are you referring to? HOMT breakers in 15 and 20 amp have been available since the beginning of Homeline. They later added the larger quad breakers (30-50).


Curt Swartz

#64060 - 03/30/06 12:06 PM Re: Need more room in Panel...  
luckyshadow  Offline
Joined: Jan 2005
Posts: 305
Maryland USA
Here in the US - Home depot does carry qo tandum breakers that are the side by side set up. They two different types for both QO panels and CH.
I'm not sure about Canada though.

#64061 - 03/30/06 01:00 PM Re: Need more room in Panel...  
Roger  Offline
Joined: May 2002
Posts: 1,716
There are even Quad breakers in Homeline. See the links below for info on Homeline and QO lines.


#64062 - 03/30/06 02:25 PM Re: Need more room in Panel...  
JBD  Offline
Joined: Jul 2001
Posts: 599
The old Square D tandem breakers were front-to-back. The tandems since the 80's have been side-by-side. The new design gives the 2 pole devices the appearance of a quad breaker, but it is really (1) 2pole + (2) 1poles.

All UL Listed panels built since the 60's are CTL. So non-CTL breakers should only be installed in panels that are over 40 years old that have wiring diagrams showing which spaces are designed for tandem circuits.

My personal belief is that non-CTL tandem breakers should go the way of the old delta breakers.

Page 1 of 2 1 2

Member Spotlight
California ,Long Beach
Posts: 28
Joined: May 2007
Show All Member Profiles 

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.022s Queries: 15 (0.003s) Memory: 0.8146 MB (Peak: 0.9871 MB) Zlib enabled. Server Time: 2017-03-29 20:58:18 UTC