Electric Panel Wiring
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Summary: Careful planning for your Sub-Panel with immediate and future load considerations will help you understand how to size your Sub-Panel. This information will help as you consider a Sub-Panel and its size. |
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Make a List of all the things you plan to use 120 volt devices Lighting Electrical Convenience Outlets GFCI Protected Outlets 240 volt equipment Motor Loads: Hot Tubs [see the Hot Tub Page] Well Pumps Air Conditioners Sub-Panel Considerations Correct amperage for all existing loads and future requirements. |
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Considerations to help determine Sub-Panel Circuit Requirements:
Important Factor: Find out if the Main Service or the Panel that will supply the Sub-Panel Circuit have adequate Load Capacity and space for the needed circuit breaker.
How big should your Sub-Panel be ? (Watts and Amperage)
This will help you consider the circuits to be served by the Sub-Panel including general purpose electrical outlets and any special equipment which will be needed.
Special Considerations:
Large 220 Volt Loads such as Welders, Air Conditioners, Motors, Well Pumps and the like may require larger size wire and conduit to provide the necessary current this equipment requires. Be sure to list all the label requirements and manufacturers specifications.
Long Distances from the power source will produce Voltage Drop, especially over 175 feet. A 2% Voltage drop factor and correction will most likely require an increased size of the wire and conduit.
Wire Types and Capacities
Cables and common wire types
Devices and Junction Boxes
Select the right box for your application
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