Red Seal Electrician Practice
Power factor and three-phaseQuestion 1018 of 1506

Why is a 120/208 V three-phase system called safer than a 120/240 V split-phase system?

  1. The loads run on a lower voltage
  2. The highest voltage in the system is lower
  3. The neutral carries a larger current
  4. The wire is thicker
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Correct answer: The highest voltage in the system is lower

The voltage between hot wires is 208 V instead of 240 V.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 7.2: Three-phase Power Systems

Practice power factor and three-phase

Questions last reviewed: 18 October 2026