starter assembly mounted on the searchlight drum
The wiring diagram for the early model 12-inch
(fig. 4-30).
mercury-xenon arc searchlight is shown in figure 4-31.
Other modifications include the following:
WARNING
Providing a 115-volt, 60-hertz ballast unit
mounted below deck near the searchlight,
Do not bridge or depress the safety switch
connected by a flexible cable
when working on the assembly or when
Installing the short-arc mercury-xenon arc lamp
replacing the lamp. Opening the searchlight
drum opens all contacts of the safety switch,
Furnishing the additional onboard repair parts
protecting personnel against electric shock. As
necessitated by the changes, which include a
an additional safety precaution, disconnect the
ballast, transformers, capacitors, spark gap, and
plug on the starter box before opening the door.
switch circuit.
Figure 4-30.--A 12-inch incandescent searchlight converted to use a mercury-xenon arc lamp.
4-32