Engineering · Electrical — Shore Power
Before connecting shore power to a vessel's system, you must verify:
- AOnly that the plug fits
- BCorrect voltage, frequency, and phase sequence (rotation)✓ Correct
- CThe shore breaker is the largest available
- DThat the ship's generators are at full load
Explanation
Shore supply must match the ship's voltage and frequency, and the phase rotation must be correct, or motors will run backward and equipment can be damaged. A phase-sequence check is made before energizing.
Authority: Marine Electrical (USCG engineering topic)
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