Red Seal Electrician Practice
Power factor and three-phaseQuestion 760 of 1506

Where are delta and Y connections often seen in electrical power systems?

  1. In thermocouples only
  2. In 3-phase AC systems
  3. In 4-20 mA loops
  4. In single cell batteries
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Correct answer: In 3-phase AC systems

Three-phase systems commonly use delta or Y connections.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 10.13: Δ-Y and Y-Δ Conversions

Practice power factor and three-phase

Questions last reviewed: 18 October 2026