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TITLE 46 - SHIPPING
CHAPTER I - COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
SUBCHAPTER J - ELECTRICAL ENGINEERING
PART 112 - EMERGENCY LIGHTING AND POWER SYSTEMS
112.05 - 3 - Main - emergency bus - tie.
Each bus-tie between a main switchboard and an emergency switchboard must: (a) Disconnect automatically upon loss of potential at the emergency switchboard; (b) Be arranged to prevent parallel operation of an emergency power source with any other source of electric power, except for interlock systems for momentary transfer of loads; and (c) If arranged for feedback operation, open automatically upon overload of the emergency power source before the emergency power source is tripped off the line from the overload.
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