A three-phase alternator has its stator windings connected in wye (star). If the phase voltage across each winding is 254 V RMS, what is the line-to-line voltage at the terminals?

Why C is correct

NEETS Mod. 5 §3-2 states that in a wye connection the line voltage is 1.732 times the phase voltage. 254 V × 1.732 ≈ 440 V, the standard shipboard distribution voltage. Option D is simply double the phase voltage, which applies to peak conversion, not wye line voltage. Option B uses an incorrect multiplier.