The turns ratio of the step down transformer with dual voltage secondary as shown in figure "B" of the illustration is two to one (total). If 440 volts were applied to terminals 'H1' and 'H2', what would be measured across 'X1-X3' and 'X2-X4' assuming that the secondary windings are connected in parallel? Illustration EL-0082

Correct Answer: Option C — 110 volts

With a 2:1 total turns ratio and parallel secondary windings, the output voltage is halved. Applying 440V across the primary terminals yields $440 / 4 = 110$ volts across the secondary sections (X1-X3 and X2-X4). IEEE 45 and 46 CFR Subchapter J require precise transformation ratios for auxiliary marine distribution systems.