Residential Load Calculator

The Standard method (Part III) applies the demand factor in Table 220.42 to general lighting + small appliance + laundry loads, then adds fixed appliances at 75% (if 4 or more), cooking per Table 220.55, dryer at 5,000 VA minimum, and the larger of A/C or heat. The Optional method (Part IV, NEC 220.82) groups general loads and counts the first 10 kVA at 100% and the remainder at 40%, generally producing a smaller calculated load. Both methods are NEC-compliant; choose whichever your AHJ accepts.

EV charging equipment is defined as a continuous load by NEC 625.41 and 625.42. Continuous loads — those that operate at maximum current for 3 hours or more — must be sized at 125% of the connected load when calculating service or feeder ampacity, per NEC 215.2 and 230.42.

Yes. Malfettone Electric uses this same engine internally on Hudson and Essex County permits. The exported PDF includes our license number, date, and address fields formatted to match what NJ AHJs expect on F120 electrical subcode applications.

Not always. NEC 230.42 requires the service to be sized for the calculated load including any continuous-load multipliers. If your calculation lands at, for example, 138 amps, a 150A service could technically suffice, but most NJ contractors size up to 200A to leave headroom for future EV chargers, generators, or solar tie-ins. PSE&G and JCPL also have utility-side service-class thresholds that affect the application path.

A free Malfettone Tools account lets you save calculations to your library, share them by URL, and export branded PDFs. Account creation is one click — name and email only. The calculator itself works with no signup.