The Optional Method allows a simplified calculation for single  dwelling units with a total connected load over 10 kVA. It uses an adjusted demand factor table and combines general and fixed loads, making it especially useful for residential applications where accurate load diversity is considered.

NEC Load Calculator (Single Family Using Optional Method)
Unit Details
Note: Nameplate ratings must be used if larger than the values shown.

* Note: In California, per 2022 Energy Code (Residential Electric Readiness), provide a labeled 240V or 208V, 50A circuit for future electric cooktop range.
* Note: In California, per 2022 Energy Code (Residential Electric Readiness), provide a labeled 240V or 208V, 30A circuit for future electric clothes dryer.
* Note: In California, per 2022 Energy Code (Residential Electric Readiness), provide a labeled 240V or 208V, 30A circuit for future electric water heater.
* Note: In California, Per 2022 CA Green Building Code, install a dedicated 40A 208/240V circuit for EV charger.