Red Seal Electrician Practice
Power factor and three-phaseQuestion 1410 of 1506

A balanced wye-connected source has a phase voltage of 120 V. What is the line voltage?

  1. 69.3 V
  2. 240 V
  3. 208 V
  4. 120 V
Show answer

Correct answer: 208 V

In a balanced wye, line voltage = phase voltage × √3 = 120 × 1.732 = 208 V.

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

Practice power factor and three-phase

Questions last reviewed: 18 October 2026