Electrical Sizing
Strict adherence to the National Electrical Code (NEC/NFPA 70) is non-negotiable. Overloading circuits causes fires; under-sizing wire causes voltage drop.
Ohm's Law / Watt's Law Calculator
The foundation of all electrical circuit planning. Solve for Amperage to size your breakers properly.
Current Draw (Amps)
Warning: Continuous loads exceed 80% rule for a 20A circuit. Upsize required.