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How do you add another electrical panel to a service?


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2015-07-15 18:31:43
2015-07-15 18:31:43

Contact a qualified electrician.

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First you need to determine if addition of the new breakers will exceed the 200A service under normal operating conditions. If so you will need to go to power company and increase service and put in a larger main panel. If you have the capacity for the extra current you can add a sub-panel and add the breakers there as well as the breakers you will remove from main panel to accommodate the sub-panel breaker. Another way depends on what breakers are in current panel. There are some breakers that can be duplexed in the same space as a single breaker.

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Yes. The interconnecting conductors have to have the same rating as the main distribution conductors. If the sub panel is detached from the main home, the sub panel has to be treated as a new service. This means that the service has to have its own ground rods or plates and the neutral has to be bonded to the enclosure of the sub panel.

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You should add only with a proper load calculation. You should probably have a licensed electrician look at the situation first. You can find a licensed electrical contractor at www.contraxtor.com to help with your electrical service upgrade

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form_title=Electrical Wiring Installation form_header=8293 How would you best describe your electrical project?*= () "Electrical panel upgrade only () Update or add a few fixtures, outlets or switches () Complete wiring for addition or remodel" Please describe this location.*= () Home/Residence () Business

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If you are doing this you are effectively limiting your main panel to 100 A with normal duty cycles. This can get complicated and an electrician is advised. But basically you have a 100A breaker that would typically be for 220-240 volt service and you would connect to the main of the second panel. The size of the wire between the two panels would have to be sized correctly and you would only bond ground and neutral at the main panel and not the branch panel. You might want to move some of the loads from the main panel to the branch depending on load calculations. If you know what you are doing and have access to a clamp on amp meter you could measure how much of the 200 Amps you are using at the current panel. This can be dangerous, so get an electrician or be careful. <<>> In the trade this is called a sub panel. It is a complicated job in as much as you have to know wire sizes, ampacity of wires and proper electrical workmanship. Such a project should be left to a licensed electrical contractor to take out the proper permits and call for proper inspections. By taking this route it will leave you confident that if any mishaps happen to the installation down the road your insurance company will be behind you 100%.


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