Full Load Current Calculator
Calculate full load current for motors, transformers and other loads
Inputs
Typical: 0.85–1.0
Typical: 85–95%
Results
Full Load Current
17.82
Amperes
Recommendation: Use this FLC to select cable sizes and protection devices with appropriate safety margins.
Full Load Current Guide
Full Load Current (FLC) is the maximum steady-state current that an electrical load will draw from the supply under normal operating conditions. Calculating accurate FLC is essential for proper cable sizing, protection device selection, and switchboard design.
Equipment-Specific Considerations
- Motors: FLC depends on rated power (kW), voltage, efficiency, and power factor.
- Transformers: FLC on primary and secondary windings determined by apparent power rating.
- Heaters: Resistive loads where FLC is calculated directly from power and voltage.
- Lighting: Depends on type and total connected load power.
- General Loads: For miscellaneous equipment following standard curves.
Key Parameters
Power Factor (PF): The ratio of real power to apparent power. Typical values range from 0.8 to 1.0. Lower values indicate more reactive power in the circuit.
Efficiency: The percentage of input power converted to useful output. Motor efficiency typically ranges from 85% to 95% depending on design and size.
Disclaimer: This calculator is provided as a guide only and must be verified by a qualified electrical engineer before use in design or installation.