TM 5-4520-256-14
3-19. CIRCUIT BREAKER (CB1) MAINTENANCE-Continued.
b.
Inspection.
(1)
Inspect wiring for cracked or burned insulation and/or exposed conductor.
(2)
Inspect circuit breaker for cracked case or other damage.
c. Cleaning.
WARNING
Cleaning solvent, Federal specification P-D-680, is toxic and flammable. Use only in a well-
ventilated area. Avoid prolonged breathing of fumes. Keep solvent away from flames. Do not
use in excessive amounts. Avoid skin contact.
(1)
Clean circuit breaker with cleaning solvent (item 1 1, Appendix E).
(2)
Allow to dry.
d.
Testing.
(1)
Connect a multimeter across circuit breaker terminals.
(2)
With circuit breaker button in, meter should indicate 0 ohms.
(3)
With circuit breaker out, meter should indicate infinity.
e.
Installation.
(1)
Place circuit breaker (3) into position on control panel (1).
(2)
Secure circuit breaker (3) with two screws (2), two lockwashers (4), and two nuts (5).
(3)
Connect wires to rear of circuit breaker (3) per tagged identification.
(4)
Install access door per para. 3-10d.
Change 3 3-54
