fastenings. Loose connections can be readily tightened.
switchboard. Notice that only the meters, operating
handles, and switches protrude at the front of the
You must first, however, perform a thorough inspection
switchboard. Figure 5-30 is an example of the rear of a
to detect them.
switchboard that may be installed on a gas
INSPECTION. Once a year and during each
turbine-powered ship. The rear of the switchboard is
overhaul, each switchboard, load center, and
enclosed in expanded metal or solid louvered panels for
distribution panel should be de-energized for a complete
protection of personnel. The switchboard may consist of
inspection and cleaning. The inspection should not be
a single section, or several sections, physically separated
limited to a visual examination. It should also include
and connected by cables. This sectional arrangement
provides greater protection against damage. For you, as
g r a s p i n g and shaking electrical connections and
the technician, it also provides a means for localizing
mechanical parts. This lets you make sure that all
damage and for removing a damaged section for repairs
electrical connections are tight and that all mechanical
or replacement.
parts are free to functiono
Check the supports of bus work and make sure the
Maintenance
supports will prevent any contact between bus bars of
opposite polarities. Also make sure the supports will
Several failures of electrical equipment are caused
prevent any contact between bus bars and grounded
b y loose electrical connections and mechanical
Figure 5-30.Rear view of a ship's service switchboard,
5-34