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.
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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.
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| NEC Ref. |
Circuit |
VA |
Breaker |
| 220-3a |
General Lighting, 3000 sq ft x 3 watts = 9000 |
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1-pole 15 |
| 220-16a |
2 Small Appliance, 1500 ea= 3000 |
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1-pole 20 |
| 220-16b |
Laundry (Washing Machine) = 1500 |
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1-pole 20 |
| T 220-11 |
Total General Lighting, Small Appl., Laundry = 13500 |
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| T 220-11 |
Apply Demands, 1st 3000 watts |
3000 |
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| T 220-11 |
Balance(10500 watts) at 35 percent |
3675 |
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| 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 |
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| 220-21 |
Larger of Heat / Air Conditioning |
20000 |
2-pole ** |
| VA |
Total |
46575 |
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| Amps |
Divide by 240 (volts) = |
194 |
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| 310-15(b)6 |
200 Amp service wire: |
2/0 copper |
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15 amp circuit = 1800 watts
20 amp circuit = 2400 watts
Home Electrical Circuits |
Additional Electrical Circuits:
Note:
Smoke Detectors are not required to be on a dedicated circuit. Smoke detectors are typically shared on a lighting circuit such as the hallway lights, this way if the circuit is off for any reason it will be noticed.
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Questions about Home Electrical Circuits
Questions about Electrical Circuits
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Electrical Tip
The Safest Way to Test Electrical Devices and Identify Electric Wiring!
The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester, [amazon.com], I use for the detection of Standard Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use. |
