Lighting load on new construction homes is calculated based on square footage.
That doesn’t even make sense as it treads someone just putting up a single 5W bulb the same as someone having an indoor hemp plantation or heavy machine shop in their basement.
Well the NEC still uses wattages from old incandescent bulbs for general lighting load calcs, plus there’s always a reasonable amount of overspeccing built into the calculation.
You would then add any large loads specifically. Clothes drier, oven, fridge, HVAC, anything that comes with a nameplate wattage rating should be included in the load calc.
Most utilities these days will also just round up to a 200A service for anything larger than a trailer. Big houses would get multiples of 200A services if needed.
Lighting load on new construction homes is calculated based on square footage.
That doesn’t even make sense as it treads someone just putting up a single 5W bulb the same as someone having an indoor hemp plantation or heavy machine shop in their basement.
Well the NEC still uses wattages from old incandescent bulbs for general lighting load calcs, plus there’s always a reasonable amount of overspeccing built into the calculation.
You would then add any large loads specifically. Clothes drier, oven, fridge, HVAC, anything that comes with a nameplate wattage rating should be included in the load calc.
Most utilities these days will also just round up to a 200A service for anything larger than a trailer. Big houses would get multiples of 200A services if needed.