Casualty power connections at the source of
connection terminals on each switchboard; the
terminals are connected to the bus bars through circuit
supply
breakers. Some ships also have small diesel-driven
Portable casualty power cables are equipped with
generators designated for casualty power use only.
metal tags that indicate the length of the cable and the
These generators are quite small and have very little
location of the cable stowage rack (fig. 8-26). Portable
control equipment.
casualty power cables should be rigged only when
required for use or when required for practice in
Casualty power connection terminals are installed
rigging the casualty power system. At all other times,
in power panels that feed equipment designed to
the cables should be stowed in the cable rack inicated
receive casualty power. The casualty power connection
on the cable tag.
terminals on the power panels may also be used as a
source of supply to the casualty power system.
METAL CABLE TAG
WARNING
(CUT FROM SEAMLESS BRASS
6" APPROX.
TUBING OF APPROPRIATE SIZE)
All terminals on power panels are HOT.
The normal supply to a panel must be shut OFF
before the casualty power cable is connected to
the terminals.
Machinery that can be supplied by the casualty
DCf0826
SERVING OF COTTON CORD
power system includes steering gear, IC switchboards,
fire pumps, and vital auxiliaries in firerooms and
engine rooms.
Figure 8-26. Portable casualty power cable tag.
The equipment and fixtures that make up an
When casualty power cables are rigged, the
alternating current (ac) casualty power system include
connections must always be made from the load to the
the following:
supply to avoid handling energized cables. Portable
Racks containing various lengths of portable
signs saying DANGER--HIGH VOLTAGE must be
posted at each connection and at 10-foot intervals
thermoplastic covered or neoprene-covered
along the length of the cable. The cables must be
cable. Each cable contains three leads or
secured to the overhead, clear of the deck.
conductors (fig. 8-27). One lead is colored black,
one is white, and one is red. This same color code
Sources of supply for casualty power use are
is used in all three-wire power circuits throughout
provided at each ship's service and emergency
the electrical installations aboard ship.
s w i t c h b o a r d . T h e s e c o n s i s t o f c a s u a l t y p ow e r
1 1/4"
14" MINIMUM-INCREASE IF NECESSARY
1 1/2"
1/2"
1/2"
1.25" O.D.
1/2"
1/2"
PHASE MARKINGS
1/2"
COPPER
FERRULE
THOF-42
INDIVIDUAL CONDUCTOR INSULATION
OUTSIDE RUBBER JACKET
BARE CONDUCTOR
7/8"
DCf0827
3/8"
Figure 8-27. Portable casualty power, 450 volts, three-phase cable end.
8-21
