Specifications

MIL-STD-1472E
5.9.17.2.2 Replacement and resetting.
Fuses shall be ~adily accessible for removal and
replacement. No other components shall require removal in order to gain access to fuses. No special
tools shall be required for fuse replacement unless required by safety considerations. When resetting
of circuit breakers is permissible, and is required for system operation during a mission, the breakers
shall be located within reach of crew members in their normal operating posture.
5.9.17.2.3 Markings. Equipment served by the fuse or circuit breaker shall be identified in
accordance with section 5.5. Labeling of fuses and circuit breakers shall be legible in the anticipated
ambient illumination range for the operator’s location.
5.9.17,2.4 Circuit broker controls. Toggle bat and legend switch actuatexlcimuit breakers may
be used to control electrical power. Push-pull type breakers shall not be used as power switches.
5.9.17,2.5 Circuit breaker dimensions and separations, Dimensions and separation for toggle
bat actuated breakers should comply with Figure 13. Legend switch actuated breakers should comply
with the dimension and separation criteria shown in Figure 14. Push-pull actuated circuit breaker
separation should comply with Table XI.
5.9.18 Printed circuit boards. Printed circuit boards shall be designed and mounted for ease of
removal and replacement, considering such factors as finger access, gripping aids and resistance
created by the mounting device. Appropriate feedback shall be provided to insure that the technician
knows when the board is securely connected.
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