Red Seal Electrician Practice
Power factor and three-phaseQuestion 212 of 1506

Why does a delta-connected load not need a neutral wire to hold its phase voltages steady?

  1. The load draws current from only one phase
  2. The load elements share a single grounded return wire
  3. The ground wire carries the neutral current
  4. Each element is across its own source winding
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Correct answer: Each element is across its own source winding

Each load element is connected straight across its own source winding, so the loss of another element does not change its voltage.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 7.5: Three-phase Y and Delta Configurations

Practice power factor and three-phase

Questions last reviewed: 18 October 2026