5 calculators in this category
- Dwelling Load Calculation CalculatorNEC 2023 (NFPA 70) Article 220, Part IIIThis calculator runs the standard method dwelling load calculation from Article 220 of the National Electrical Code and returns…
- Optional Dwelling Load Calculation CalculatorNEC 2023 (NFPA 70) 220.82This calculator runs the optional dwelling load calculation of NEC 220.82 — the short method most designers reach for on a…
- EV Charger Circuit & Load CalculatorNEC 2023 (NFPA 70) Articles 625, 210 and 220.57Electric vehicle supply equipment is a continuous load in the eyes of the National Electrical Code, so its breaker and its…
- Continuous Load Breaker Sizing CalculatorNEC 2023 (NFPA 70) 210.19, 210.20, 215.2, 215.3, 240.6This calculator sizes the overcurrent device and the conductor for a circuit that carries a continuous load. The National…
- Available Short Circuit Current CalculatorPoint-to-point method (Bussmann/IEEE 241); NEC 110.9, 110.24Every breaker and fuse carries two current ratings: the trip rating, which says when it opens, and the interrupting rating…
Which one do you need?
- Dwelling Load Calculation Calculator
- Run the NEC Article 220 standard dwelling load calculation: general lighting, range, dryer, appliance and HVAC demand, plus the service amps you need.
- Optional Dwelling Load Calculation Calculator
- Run the NEC 220.82 optional dwelling load calculation: 100% of the first 10 kVA, 40% of the rest, plus the largest heating or cooling selection.
- EV Charger Circuit & Load Calculator
- Size the breaker, conductors and added service load for an EV charger to NEC 625 and 220.57, check whether your panel has capacity, and see charging speed.
- Continuous Load Breaker Sizing Calculator
- Size the breaker and conductor for a continuous load using the NEC 125% rule, standard 240.6(A) ratings, Table 310.16 ampacity and temperature derating.
- Available Short Circuit Current Calculator
- Calculate available fault current at a transformer secondary and at any downstream point with the point-to-point method, and check equipment AIC ratings.