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04-02-2008, 06:33 PM
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#1
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Lehigh Valley PA
Join Date: Mar 2007
Posts: 76
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Breaker box
Is there any standard as to how a breaker box needs to be mounted in a residential application?
Reason I ask is I would like to mount one sideways surface mounted on the wall.
It is a 200A panel with 40 spaces.
Also what is the standard mounting height?
Thanks.
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04-02-2008, 06:39 PM
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#2
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Electrician
Join Date: Aug 2007
Location: Connecticut, Litchfield
Posts: 2,015
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Breaker box
Here is one reason...
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04-02-2008, 07:45 PM
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#3
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Member
Join Date: Mar 2005
Location: Welland, Ontario
Posts: 6,016
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Breaker box
That's a big difference between NEC and CEC. It is common to mount a breaker panel on its side in Canada. We can also have more than 42 breakers in one panel.
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04-02-2008, 07:46 PM
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#4
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Lehigh Valley PA
Join Date: Mar 2007
Posts: 76
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Breaker box
Quote:
Originally Posted by chris75
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What is this supposed to mean?
I looked up the section and all I can find is this:
"240.33 – The first sentence of this section has been rewritten to permit enclosures for overcurrent devices to be mounted in other than a vertical position when it is not practical to do so."
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04-02-2008, 08:19 PM
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#5
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Licensed electrician
Join Date: Sep 2007
Location: Maryland
Posts: 5,974
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Breaker box
On must be Up. This precludes the mounting of panels on their side.
The middle of the handle of the highest breaker can be no higher than 2 meters or 6'7".
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04-02-2008, 09:20 PM
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#6
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Union Electrician
Join Date: Nov 2007
Location: Chicago, USA
Posts: 615
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Breaker box
Actually it doesn't preclude mounting them on their side, but it does eliminate half of the panel.
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04-02-2008, 09:27 PM
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#7
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You talking to me?
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
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Breaker box
Quote:
Originally Posted by joed
That's a big difference between NEC and CEC. It is common to mount a breaker panel on its side in Canada. We can also have more than 42 breakers in one panel.
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as soon as '08 code is adopted, we can too.
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04-02-2008, 09:35 PM
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#8
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Lehigh Valley PA
Join Date: Mar 2007
Posts: 76
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Breaker box
Another ? I have is this...
Is there a limit to how many double pole breakers that can be installed in a 40 circuit box?
I ask because I have radiant heat and each room is a separate zone so I have seven 20A double pole breakers already plus the one for the oven, the range top, water pump, the welder, and the portable heater outlet in the garage.
So I am wondering how many are allowed in a box and if there is a limit.
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04-02-2008, 09:36 PM
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#9
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You talking to me?
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
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Breaker box
Quote:
Originally Posted by Nhrafan
So I am wondering how many are allowed in a box and if there is a limit.
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I would have to say
20
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04-02-2008, 09:38 PM
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#10
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Member
Join Date: Oct 2007
Posts: 2,294
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Breaker box
Quote:
Is there a limit to how many double pole breakers that can be installed in a 40 circuit box?
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That would be 20 
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04-02-2008, 09:40 PM
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#11
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Lehigh Valley PA
Join Date: Mar 2007
Posts: 76
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Breaker box
Thanks guys!
I appreciate it.
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04-02-2008, 10:36 PM
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#12
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Licensed electrician
Join Date: Sep 2007
Location: Maryland
Posts: 5,974
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Breaker box
Unless the panel is listed for use with tandems the answer could be zero.
What is the brand and part number of your panel?
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04-03-2008, 08:17 AM
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#13
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When is fishing season?
Join Date: Feb 2008
Posts: 613
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Breaker box
Quote:
Originally Posted by Jim Port
Unless the panel is listed for use with tandems the answer could be zero.
What is the brand and part number of your panel?
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Why would the answer be zero? If the panel was listed for 40 circuits, then 20 dp breakers could be installed.
__________________
I DON'T OWN MY HOUSE... MY HOUSE OWNS ME!
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04-03-2008, 08:41 AM
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#14
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Licensed electrician
Join Date: Sep 2007
Location: Maryland
Posts: 5,974
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Breaker box
Andy,
I disagree, the panel label will show if and where the tandems can be used. The 40 circuit panels I have seen and installed do not allow tandems. The mounting rails will not allow the use of CTL (circuit tandem limiting) breakers. Use of non-CTL breakers are listed for replacement use only.
A panel like a QO200M3040 takes 30 full size breakers but can use 10 tandems to makeup the 40 circuits. The devil is in the details.
On a side note why use a breaker than is more than double the cost over a single?
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04-03-2008, 08:49 AM
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#15
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Electrical Contractor
Join Date: Feb 2008
Location: Colonia, NJ
Posts: 127
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Breaker box
The question was "how many double poll breakers could fit?"
Tandems are not double poll breakers.
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