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If my breaker box is full...

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You can get four position breaker boxes for under $40 - empty. One of those can be tied into your main panel as a sub panel. I have a 10 position sub hooked to a 30 position main panel.

Note you have to feed the sub from a breaker in the main, which means you'll need to relocate one or two breakers to the sub....

Cheers!
 
You will want to get a few quotes, the price on this type of project can vary drastically from one electrician to the next based simply on how busy they are.

The first thing you should do is read the panel. It will tell you the maximum amperage per stab (side or bus bar). If you're near that limit then you're looking at a much bigger project.

If you're not near the main panel limit then adding a Sub Panel is not terribly hard. As a diy project probably $250 and an afternoon with a pair of pliers and a screwdriver.
 
If you're not approaching the amperage limit of the box, but rather just have a lot of circuits on there, you can utilize the dual switch single space breakers to free up some space. For instance if you have 4x 15amp circuits all in a line, you can get 2x dual 15amp single space breakers, and then you'll have space for a 240v breaker. Thats what i did when we put in our hot tub. Our house is weirdly set up and we have a lot of different 15amp circuits that feed like 2 or 3 outlets tops in areas that dont get use.
 
Not all panels are approved for half-height breakers. Mine is that way. It may be say 20 space/40 circuit or 20 space/20 circuit. SquareD mechanically prevents you from plugging the half height breakers on the buss bar and IIRC so does Siemens.

We switched to a gas stove so I took the feed for the gas stove and pulled it back to where my brewery is and used it to feed a subpanel. The former stove breaker got changed out for a GFCI so my whole brewery panel is GFCI protected.
 
I literally just did this. I did a 100 amp subpanel. This is an approximate breakdown of my stuff. It's not that hard to do at all if your main panel is close like mine was.

100amp breaker = 38
50amp GFCI = 100
30 amp GFCI = 98
20 amp outlet = 5
50 amp outlet = 15
30 amp outlet = 10
Empty subpanel = 22
various conduit / fittings = 40?
Wire = 80

This video is a a great help...


20190504_185646.jpg
 
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