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Electrical Panels - Problem Set 3.1

Source(s) or Contributor(s)
Pacific Northwest National Laboratory
Question

 

  1. Calculate the electrical load for a 2,500 square foot single-family home using the following appliances:
    1. 3 appliance circuits
    2. 5,000W range
    3. 1,000W dishwasher
    4. 5,600W clothes dryer
    5. 15,000W baseboard heating (resistance heaters)

       You can use the following assumptions:

  • 3 VA per square foot for lighting
  • 1,500 VA per appliance circuit
  • For general loads, assume the first 10,000 W at 100% demand factor and remainder at 40%.
  • For heating loads, assume 100% demand factor

 

  1. Now assume you want to add a 30-amp heat pump to replace the floorboard heaters and add cooling. Will your electrical load exceed the home’s 200A service? Are you reducing or increasing the overall electrical load by adding the heat pump?