A three-phase load requires a minimun of:

A three-phase load requires a minimun of:

• A. One
• B. Two
• C. Three supply lines
• D. Four

Answer: (C)

Three-phase power delivers energy through three separate conductors, each carrying current that is 120 degrees out of phase with the others. A load designed for three-phase operation must be connected to all three phases to receive the proper three-phase excitation, ensuring balanced voltages and smooth, even torque. If you used fewer than three supply lines, you wouldn’t be supplying the load with true three-phase power; with only two lines, the device would behave like a single- or two-phase circuit, leading to severe imbalance, inefficiency, and potential overheating. The neutral conductor (if present) isn’t required for a typical three-phase load, so the essential minimum to power it correctly is three supply lines.

Three-phase power delivers energy through three separate conductors, each carrying current that is 120 degrees out of phase with the others. A load designed for three-phase operation must be connected to all three phases to receive the proper three-phase excitation, ensuring balanced voltages and smooth, even torque. If you used fewer than three supply lines, you wouldn’t be supplying the load with true three-phase power; with only two lines, the device would behave like a single- or two-phase circuit, leading to severe imbalance, inefficiency, and potential overheating. The neutral conductor (if present) isn’t required for a typical three-phase load, so the essential minimum to power it correctly is three supply lines.