Types of Breakers

# Home Electrical Service Calculation

 By Dave Rongey Summary: The home electrical service size is based upon the electrical loads and the required circuits specified by the electrical codes as shown in this example.

## Electrical Service Calculations Process

This electric service calculation 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

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

## Join the Discussion!

Circuit Breaker Wiring Question
Comment

 »Avoid Costly Mistakes« Wire It Right with the help of my Illustrated Wiring Book Great for any Home Wiring Project, Perfect for Homeowners, Students and Electricians!
 Complete Guide to Home Electrical Wiring Learn more about How to Wire Circuit Breakers and Panels Perfect for Homeowners, Students and Electricians Includes: Home Electrical Circuit Breakers 120 Volt Circuits 240 Volt Circuits Multi-Wired Circuits Wiring Methods for Installing Electrical Circuit Wiring Electrical Codes for Home Electrical Wiring ....and much more. Be Sure to Get Your Copy!

## Search to see more.....

Questions and answers about Wiring Circuit Breakers, Installing Breakers, Troubleshooting Electric Problems, Inspection and Repair.