Red Seal Electrician Practice
Power factor and three-phaseQuestion 1412 of 1506

A balanced wye-connected load is fed from a 480 V line-to-line supply. What is the voltage across each phase?

  1. 160 V
  2. 831 V
  3. 480 V
  4. 277 V
Show answer

Correct answer: 277 V

In a balanced wye, phase voltage = line voltage ÷ √3 = 480 ÷ 1.732 = 277 V.

Source: Computed, 7.5: Three-phase Y and Delta Configurations

Practice power factor and three-phase

Questions last reviewed: 18 October 2026