MIL-DTL- 24784/11C(NAVY)
(2) A schematic wiring diagram, as well as written descriptive material of the ship service, emergency
and special electric power distribution systems, and including the following but showing nothing
beyond the power panel or individual load supplies by each feeder emanating from the ship service
switchboards, emergency switchboards, or load center switchboard:
(a)
Switchboard bus arrangement.
(b) Generators (ship service, emergency, and special), motor generator sets, solid-state frequency
changers (including electronics, aircraft servicing, interior communication, and weapons
control).
(c)
Bus ties and bus feeders.
(d) Shore power connections.
(e)
Line voltage regulators.
(f)
Voltage and frequency monitors.
(g) Rectifiers.
(h) No-break power supplies.
(i)
Feedback circuits.
(j)
Transformers (lighting and interior communication).
(k) Circuit breakers, (types, size, and element ratings).
(l)
Feeder designation with name and designation of load centers, power panels, transformers, or
individual loads served.
(m) Generator prime mover types.
(3) A diagram showing the normal, alternate, and emergency feeders to the following loads:
(a)
Steering gear.
(b) Weapons systems.
(c)
Electronic systems.
(d) Main drainage pumps and fire pumps.
(e)
Interior communication switchboards.
(4) In addition, bus ties and other interconnections shall be shown. For special types of ships, other loads
shall be shown that are considered of the same order of importance as those listed above. This
diagram shall show the loads, switchboards, and generators in block form with no interior connections
or details, such as circuit breakers or bus arrangements and shall show each of these elements at their
approximate frame location. No effort shall be made to differentiate between different deck levels.
The cables shall be shown in their actual location only insofar as they are to port, center, or starboard.
For ships with three decks or platform levels or less (excluding superstructure), a wiring deck plan of
the power systems shall be included. For all other ships, an isometric diagram of the power systems
shall be provided.
d.
Switchboard - A description shall be given and illustrations included, where specified:
(1) Number and location.
(2) Use of each unit or section, for example, whether for generator, bus tie, or distribution.
(3) Any special features applying to switchboards, such as: Automatic operation of the emergency
generating plant, feedback arrangements, and current controlled contactors.
(4) Any special features applying to switchboards, such as: Automatic operation of the emergency
generating plant, feedback arrangements, and current controlled contactors.
(5) Requirements for paralleling with shore power.
(6) Single generator.
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