Professional Electrical Calculators

📊 Example: 50A circuit at 240V over 100 feet → Recommends 6 AWG copper or 4 AWG aluminum

📊 Example: 100 ft of 12 AWG copper carrying 20A at 120V → 3.2% voltage drop

📊 Example: 10 AWG THHN at 90°C in conduit → 40A ampacity (derated to 35A at 30°C ambient)

📊 Example: 100A circuit breaker → Requires 8 AWG copper or 6 AWG aluminum ground

📊 Example: 1500W heater at 120V → 12.5 amps

📊 Example: 20A at 240V → 4800 watts

📊 Example: 120V with 10Ω resistance → 12A current, 1440W power

📊 Example: 10kW at 240V three-phase → 24.1 amps per phase

📊 Example: 5.5kW motor at 480V three-phase → 6.6 amps

📊 Example: 10 HP motor at 240V → 38 amps full load current

📊 Example: 48A charger at 50 feet → 6 AWG copper or 4 AWG aluminum required

📊 Example: 50A hot tub at 75 feet → 6 AWG copper in conduit

📊 Example: 60A subpanel at 150 feet → 4 AWG aluminum URD cable

📊 Example: 3-ton AC unit → 30A breaker with 10 AWG wire

📊 Example: 2 HP pump at 230V → 20A circuit with 12 AWG wire

📊 Example: 100kW at 480V → 120.3A per phase, recommends 1/0 AWG

📊 Example: Three 10 AWG THHN in 3/4" EMT → 16% fill (40% max allowed)

📊 Example: 2000 sq ft home → 150A service recommended

📊 Example: 200A service → 2/0 copper or 4/0 aluminum service entrance cable

📊 Example: 25 HP motor → 40A wire, 70A breaker, 38A overloads