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Adding additional breakers to sub panel from a sub panel to run new wire

Adding additional breakers to sub panel from a sub panel to run new wire


Old 10-04-17, 05:43 AM
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Adding additional breakers to sub panel from a sub panel to run new wire

My house has a 100 amp service panel in it. 2 50 amp breakers are wired to a sub panel that then has 2, double 30 amp breakers, one that services the in house clothes dryer and the other that services a line that goes to a woodshop. The woodshop has 6 20 amp breakers, 1 of which services a lower shed that I am trying to make into a tiny house for my son. I am trying to upload pics. My questions is, can i add 2 more 20 amp breakers to the service panel in the woodshop to add additional circuits to the tiny house?
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Old 10-04-17, 05:59 AM
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Any outbuilding can only have one power feed, so if the tiny house requires more than one circuit you will need to install a subpanel in the tiny house. There are 2 things to consider: do your panels have the physical space for the feeder breakers, and does your electrical service have the electrical capacity to support the additional loads (appliances, lights, etc) for the new building. It sounds like you have the space, but I'm not sure about the capacity.

The formal way to figure it out is to do a demand load calculation -- there are online calculators that can help work through that. If you let us know the size of your house and what electric appliances you have we can probably give you a ballpark estimate.
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