Primary & Secondary Protection Sizing Calculator — According to NEC
Calculate primary and secondary protection sizing accurately with the NEC calculator for compliant electrical system design and safety per NEC standards.
Electrical
Electrical Calculators and Conversion
kW to Amps Calculator ⚡ Instant 1‑Click Conversion & Formula [Free 2025 Guide]
Convert kW to amps: kW×1000 ÷ (√3·V·PF) = Current, instantly explained. Use our free calculator — one click, precise results, slash wiring costs today. kW to Amps Calculator Power (kW): ? kW = kilowatts, the real power actually doing work. • 1 kW ≈ a domestic microwave. • 22 kW ≈ a medium EV charger. Tip: kW is what you pay for on … Read more
Bending Radius in Electrical Cables Calculator – NEC
Calculate the bending radius of electrical cables per NEC standards quickly and accurately with our easy-to-use bending radius calculator.
Arc Flash Incident Energy Calculator – NFPA 70E, IEEE 1584
Calculate arc flash incident energy accurately with NFPA 70E and IEEE 1584 standards for enhanced electrical safety and compliance.
Amps to HP Calculator – Formula, Tables, and Examples
Easily convert amps to HP with our calculator, tables, formulas, and step-by-step practical examples. Calculate horsepower from single-phase or three-phase amps, considering efficiency and power factor. Amps → HP Calculator Current (A): System: Single-phase ACTwo-phase ACThree-phase ACDirect Current (DC) Voltage: Other voltage: Power factor: 0.70.750.80.850.90.951Other value Other PF: Efficiency η (%): 707580859095100Other value Other η … Read more