MIL-PRF-11021H
mechanical, and electrical interface requirements. Dimensions of the switch assembly and
switches are shown in Figure A1.
3.3.1 Springs. Mechanical springs shall not be used to transmit current (see 4.1.3).
3.3.2 Connector. Connectors shall conform to Drawing 7723494 contact arrangement
28-51. The shell may be integral with its mounting surface (see 4.1.3). The pin configuration and
assignments are shown in Figure A1.
3.3.3 Cables. Cables shall conform to MIL-DTL-13486 (see 4.1.2). Internal wires shall
be 14 gauge conductors (AWG).
3.3.4 Mechanical interlock. The switch assembly shall incorporate a mechanical
interlock to prevent the inadvertent energizing of any part of the light system except the blackout
marker lights. To energize the blackout drive lights, the operator must first switch to the
blackout marker position, then deactivate the mechanical interlock in order to switch to the
blackout drive light position of the switch. To energize the stop/turn lights or service drive
lights, the operator must switch clockwise from the "OFF" position while deactivating the
mechanical interlock in order to switch to the desired position (see 4.1.3).
3.3.5 Index marking. Index marks and their identification shall be made by etching,
engraving, embossing, casting, or other approved permanent marking method (see 4.1.3).
3.3.5.1 Identification and color of marking. Index positions shall be identified as
specified in Figure A1 and applicable drawings (see 4.4.2). Color of the markings shall be base
metal or white (see 4.1.2 and 4.1.3).
3.3.6 Resistor. The panel lamp circuit shall be connected in series with a 30 ohm +
5 percent (%), five-watt resistor conforming to MIL-PRF-26 (see 4.1.2 and 4.1.3). The dimming
resistor is intended to only limit the current for the vehicle instrument panel lamps. The resistor
shall be mounted with sufficient spacing or insulation from the internal switch materials to
prevent damage from heat dissipated while operated at maximum load conditions for an
indefinite period of time.
3.3.7 Circuit breaker. The switch assembly shall be equipped with an internal nominal
20 ampere circuit breaker in the battery feed line, pin F. All of the current passing through the
switch assembly, except the circuits fed by pins C, K, and N, shall pass through the circuit
breaker (see 3.4.3 through 3.4.11, and 4.1.3).
3.4 Performance.
3.4.1 Electrical continuity. The switch assembly shall close appropriate circuits when
main and auxiliary levers are in indexed positions. All other circuits shall remain open.
Mechanical interlock shall function as designed, in accordance with 3.3.4 (see 4.6.1).
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