1. What is the kW to Amps Formula?

The kW to Amps formula converts electrical power in kilowatts (kW) to current in amperes (A) when the voltage is known. This is essential for electrical system design and circuit protection.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I \) — Current in amperes (A)
• \( kW \) — Power in kilowatts
• \( V \) — Voltage in volts

Explanation: The formula converts kW to watts (×1000) then divides by voltage to find current according to Ohm's Law (P = IV).

3. Practical Applications

Details: This calculation is used for sizing wires, circuit breakers, and fuses in electrical installations, ensuring safe operation of electrical equipment.

4. Using the Calculator

Tips: Enter power in kW and voltage in volts. Both values must be positive numbers. For three-phase systems, use line-to-line voltage and include power factor if known.

5. Frequently Asked Questions (FAQ)

Q1: Does this work for AC and DC circuits?
A: Yes, for DC circuits and AC resistive loads. For AC inductive/capacitive loads, power factor must be considered.

Q2: How to calculate three-phase current?
A: For three-phase: \( I = \frac{kW \times 1000}{V \times \sqrt{3} \times PF} \) where PF is power factor (typically 0.8-0.95).

Q3: Why multiply kW by 1000?
A: To convert kilowatts (kW) to watts (W) since 1 kW = 1000 W.

Q4: What's the difference between line and phase voltage?
A: In three-phase systems, line voltage is between two phases, while phase voltage is between phase and neutral.

Q5: How does wire size relate to current?
A: Higher current requires larger wire gauge to prevent overheating. National Electrical Code (NEC) provides ampacity tables.