Figure 3-45.--Rear of switchboard showing casualty power terminal.
circuit breakers will not trip and that the cable will not
the dark you can make the identification by feeling the
become overheated. Current loading of casualty power
bumps on the riser terminals or feeling the twine
cables is not considered excessive when you can grasp
wrappings or O-rings installed on the cables.
the cable by hand and it does not cause burning.
Ordinarily, portable casualty power cables should
Portable cable used in ac casualty power systems is
be tied to the overhead. High-voltage signs should be
Navy LSTHOF 42. Although the normal current
attached at each connection and the information passed
carrying capacity of this cable is 93 amperes, its casualty
over the ship's 1MC system informing all hands to stand
rating is 200 amperes. Under normal conditions this
clear of the casualty power cables while energized.
cable will carry 200 amperes for 4 hours without
damage to the cable. Cables maybe run in parallel to
As previously stated, power panels supplying
circuits that overload a single cable.
equipment designated for casualty power service will
have a power terminal box mounted on the panel so that
Recommended SAFE procedures to be used in
power may be fed into the panel. Remember that these
rigging casualty power include the following:
panels can also be used as a source of power for the
· Upon report of loss of power, DCC orders the
casualty power system should power still be available
repair party nearest the equipment concerned to
from the permanent feeder or feeders to the panel. Some
judgment should be exercised, however, in the choice of
· The repair party EM of the investigating team
panels to be used for supplying casualty power loads.
Heavy loads should be connected to power panels
immediate] y tests to determine if all sources of power
to the equipment have been lost.
having large incoming feeders for greater assurance that