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.
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."
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.
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.
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.
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?
Sorry for the confusion. I misread the double pole part as tandems.
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