C.F.R. » Title 46 » CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY › SUBCHAPTER J—ELECTRICAL ENGINEERING › PART 112—EMERGENCY LIGHTING AND POWER SYSTEMS › Subpart 112.30—Emergency Systems Having an Automatically Connected Storage Battery as the Sole Emergency Power Source

46 C.F.R. § 112.30-10

Restoration of normal source potential

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When the potential from the normal source is restored to 85 to 95 percent of its normal value, the emergency loads must transfer automatically to the normal source.