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Need more room in Panel... #64053
03/29/06 10:02 PM
03/29/06 10:02 PM
Cinner  Offline OP
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?

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Re: Need more room in Panel... #64054
03/29/06 10:18 PM
03/29/06 10:18 PM
BigB  Offline
Joined: Mar 2004
Posts: 740
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.

Re: Need more room in Panel... #64055
03/29/06 10:27 PM
03/29/06 10:27 PM
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.

Re: Need more room in Panel... #64056
03/29/06 10:55 PM
03/29/06 10:55 PM
Sixer  Offline
Joined: Aug 2005
Posts: 265
Yes, the QO tandems are available in Canada.


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Re: Need more room in Panel... #64057
03/29/06 11:00 PM
03/29/06 11:00 PM
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.

Re: Need more room in Panel... #64058
03/29/06 11:22 PM
03/29/06 11:22 PM
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.

Re: Need more room in Panel... #64059
03/29/06 11:58 PM
03/29/06 11:58 PM
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
Re: Need more room in Panel... #64060
03/30/06 11:06 AM
03/30/06 11:06 AM
luckyshadow  Offline
Joined: Jan 2005
Posts: 315
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.

Re: Need more room in Panel... #64061
03/30/06 12:00 PM
03/30/06 12:00 PM
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.


Re: Need more room in Panel... #64062
03/30/06 01:25 PM
03/30/06 01:25 PM
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.

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