Mike Dolt Enterprises
Mike Dolt Enterprises
User: Npstewart, Location: Henrico County, VA
Asked on: Friday, April 8, 2011 at 2:52 pm EDT
Answered on: Tuesday, May 14, 2024 at 3:57 am EDT
Question: Anyone have a rule of thumb method to figuring how many 20 or 15 A lighting & receptacle circuits you will need in a house?Ie, if you have a 3,000 square foot house that would be 9000 watts total is it best to figure 1,000 watts on each circuit so you would have 9 circuits total?Also, do you typically keep the lights/receptacles separate or give a circuit to each bedroom or 2? I know there is no right or wrong way I guess I am just looking for the smartest way.Thanks
Rule of Thumb for Number of Circuits
General Living Areas
800-1000 watts per circuit
Kitchen
1200-1500 watts per circuit
Bedrooms
600-800 watts per circuit (lights and receptacles on separate circuits)
Bathrooms
1000-1200 watts per circuit (lights and receptacles on separate circuits)Based on your example: 3,000 square feet x (800-1000 watts per sq ft) = 2,400,000-3,000,000 watts
Number of Circuits (15 A or 20 A)
3,000,000 watts / 15 amps = 200,000 watts / 120 volts = 1667 circuits 3,000,000 watts / 20 amps = 150,000 watts / 120 volts = 1250 circuits
Circuit Allocation
Lights
Keep lights on separate circuits from receptacles.
Receptacles
Ideally, allocate one circuit per bedroom or two.
Specialized Areas
Separate circuits should be used for: Kitchen appliances Bathrooms Outdoor outlets Dedicated equipment (e.g., HVAC)
Smartest Way: Consider the number of occupants, their habits, and the size of the house. Plan for future expansion and flexibility by installing more circuits than the minimum requirement. Keep lighting and receptacles separate to prevent overloading. Use GFCI outlets in areas where there is potential for moisture or water contact.* Consult with a qualified electrician for the specific requirements of your house. Flag for review