Determining Main Panel Load with Subpanel added
Discussion in another thread got me thinking about a very important consideration when adding a subpanel to a main panel:
When adding a subpanel, does the load for the MAIN panel become the sum of the loads of both panels or is it calculated differently?
LOAD=Main+SubWhat if additional subpanels are added?
It seems that if you are adding subpanel to a MAIN because the MAIN is full, you would be taxing the load capacity of the main panel if you also filled the subpanel.
You will not be overloading your main panel, your main panel would draw only as much as your main breaker can handle.
If your main panel is full and you add another subpanel, as long as you don't go over the rateing of the main breaker you are fine. You could have a full main panel as well as 10 subpanels that are all full but as long as you don't exceed the main breaker you will have no problems.
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