What is the minimum threshold voltage at which the skin offers no appreciable resistance to electrical current flow and is known as the "skin-puncture voltage"?
Official USCG Answer & Rule Citation
Correct Answer: Option C — 600 VAC
At 600 VAC, human skin loses its dielectric properties and offers virtually no resistance to current flow, a critical safety threshold defined in electrical safety standards as the skin-puncture voltage, greatly increasing fatal ventricular fibrillation risks aboard marine vessels.
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