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Discussion Starter #1
I would like to add to my 150 amp panel. Can someone direct me to some literature on how to properly size a panel? I don't know if there is something I can calculate to find out if I have anymore room to add another circuit.
 

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UAW SKILLED TRADES
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There really isn't anything to calculate unless your tripping your main breaker with what you have. Panels are ctl meaning they are circuit limited so if the panel is full you may have a few options. We can tell you but need the following questions answered.

Can you tell us what is the manufacturer of the 150 amp panel you have?
Can you also give us the model number? ....this will usually be on the specifications sheet on the inside of the panel door.
 

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Discussion Starter #3
There really isn't anything to calculate unless your tripping your main breaker with what you have. Panels are ctl meaning they are circuit limited so if the panel is full you may have a few options. We can tell you but need the following questions answered.

Can you tell us what is the manufacturer of the 150 amp panel you have?
Can you also give us the model number? ....this will usually be on the specifications sheet on the inside of the panel door.

Well, the panel definitely has additional slots. It is a Square D panel. I'll try to get the numbers off of it. It has eight slots open. Would I be able to tell anything by the amount of major appliances? It has a heatpump condenser, air handler 5kw strip, stove, dryer, and water heater as its major appliances.
 

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You can install a breaker and a sub panel if you want to. However, you must follow the rules (NEC) when installing the sub panel.

1) It must be a 4 wire circuit feeding the sub
2) 2 Hots - 1 Neutral - 1 ground
3) If the sub panel is going to be installed in another room or basement it will need it's own main breaker.
4) Do not bond the neutral to the ground like it is in the Main Panel.
5) Provide Stubbie with the information, so he can check on your panel.
 
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