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USCG Exam PracticeAC circuits and theory

On a shipboard AC system nameplate, the voltage rating '440 V' refers to which value of the sine wave?

  1. A. Peak value
  2. B. Peak-to-peak value
  3. C. Average value of one half-cycle
  4. ✓ Root-mean-square (RMS) valueCorrect

Why D is correct

NEETS Mod. 2 §1-2 states that meter scales and equipment nameplates are stated in RMS. The 440 V rating is the effective value; the actual peak voltage on that system is approximately 622 V (440 × 1.414).

Cited:NEETS Mod. 2 §1-2

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On a shipboard AC system nameplate, the voltage rating '440 V' refe… — USCG Exam Practice · CaptainsGround