Motors, Transformers, Generators
Size the supply for equipment: motor full-load amps and protection, HVAC minimum circuit ampacity, transformer kVA and the generator a house or job needs.
Tools in this group
- Generator Size Calculator
- List your loads with running and starting watts to get the generator size, with altitude and temperature derating.
- HP to Amps Calculator
- Enter horsepower and voltage to get the motor current by formula and by the NEC table, then size the wire and protection.
- Minimum Circuit Ampacity Calculator
- Enter compressor and motor loads to get the MCA, the maximum overcurrent protection, or check a circuit from a nameplate.
- Transformer Sizing Calculator
- Enter your load and growth margin to get the transformer kVA, the next standard size and the primary and secondary amps.
- What Size Generator Do I Need?
- Tick the appliances you want to run to find out whether a portable or a standby generator fits and how many kW.