Calculating Your Home's Electrical Load
2. Taking Stock of Your Electrical Devices
Alright, time to put on your electrical detective hat! To figure out if that 200 amp circuit breaker is sufficient, we need to estimate your home's total electrical load. This involves making a list of all your appliances and lighting fixtures, and then figuring out how much power each one consumes. Don't panic, it's not as complicated as it sounds.
Start with the big appliances — the ones that really hog energy. Things like your air conditioner, electric furnace or baseboard heaters, water heater, electric range, dryer, and refrigerator. These are the heavy hitters. Look for the wattage or amperage rating listed on the appliance's nameplate. It's usually found on the back or bottom of the appliance.
Once you have the wattage, divide it by the voltage (usually 120V or 240V in North America) to get the amperage. For example, a 1200-watt microwave running on 120V draws 10 amps (1200W / 120V = 10A). Make a list of all these appliances and their amperage draw.
Don't forget the smaller appliances like your TV, computer, toaster, and coffee maker. While they don't draw as much power individually, they can add up. Also, consider your lighting. LED bulbs use significantly less energy than older incandescent bulbs, so make sure to factor that in. Add all these up, and you'll have a rough estimate of your total electrical load.