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 TM 55-1905-242-14
UNIT MAINTENANCE
FOR FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
220V/110V CONTROL AND DISTRIBUTION PANELS, TEST/REPAIR
INITIAL SETUP:
Tools and Special Tools:
References:
Tool Kit, Mechanic's Rail and Marine
FM 55-502
(Item 1, Table 1, WP 0230 00)
TM 55-1905-242-24P (WP 0034)
Multimeter (Item 2, Table 1, WP 0230 00)
Personnel Required:
Two Watercraft Engineers, 88L
TESTING
WARNING
Take great care when working around energized electrical equipment. Contact between
unprotected body parts and electrical conductors can cause serious injury or death. Do
not wear jewelry or other conductive items while servicing energized electrical equip-
ment. Failure to comply can cause serious injury or death.
1.
Operate each circuit breaker in the panel and ensure that it controls its device. If any circuit breaker fails to control its
device, test the circuit breaker by the following the procedure below:
a.
Set the multimeter to the Vac (Volts alternating current) setting.
b.
Place the multimeter leads on both circuit breaker's wiring (1) terminals and note the voltage. With the circuit breaker
in the OFF position, the multimeter should read either 220 Vac or 110 Vac, depending upon the circuit. With the
circuit breaker in the ON position, the multimeter should read 0 Vac. If these readings cannot be obtained, the circuit
breaker is defective. If these readings are obtained, the circuit breaker is operating normally.
2.
If any circuit breaker is found to be defective, replace it.
0100 00-1
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