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Electric Circuit Listing

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 Summary: The size of the home electrical service panel is designed by calculating the square footage of the home and factoring in the code requirements for the electrical circuits that are required.

Electrical Wiring Circuits for a Typical Family Home
This electric circuit listing is based on a single family home of 3000 square foot with the following electrical loads:

1- 12 kw electric range
20 kw of electric space heating (1 central elect. heating unit)
1- 5 kw electric water heater
1-central air conditioner, 9 kw
1- dishwasher, 1 kw
1- disposal, 0.9 kw
1- electric clothes dryer, 4500 watt


Electric Circuit Listing - Home 3000 sq. ft.

NEC Ref. Circuit VA Breaker
220-3a General Lighting, 3000 sq ft x 3 watts = 9000 -- 1-pole 15
220-16a 2 Small Appliance, 1500 ea= 3000 -- 1-pole 20
220-16b Laundry (Washing Machine) = 1500 -- 1-pole 20
T 220-11 Total General Lighting, Small Appl., Laundry = 13500 --  
T 220-11 Apply Demands, 1st 3000 watts 3000  
T 220-11 Balance(10500 watts) at 35 percent 3675  
220-18 Dryer (minimum 5k) 5000 2-pole 30
220-19 Range (from col C) 8000 2-pole 50
220-17 Add Fixed Appliance x 100 percent (not more than four) 6900  
220-21 Larger of Heat / Air Conditioning 20000 2-pole **
VA Total 46575  
Amps Divide by 240 (volts) = 194  
310-15(b)6 200 Amp service wire: 2/0 copper  

15 amp circuit = 1800 watts
20 amp circuit = 2400 watts


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