A-A-52482 Switch, Rotary: Stoplight, Vehicular, Mechanically Actuated, 28 Volt DcThis CID covers a 28 volt (V) direct current (dc) single-pole, single-throw waterproof rotary switch intended for use with a stoplight in tactical vehicles operating on a nominal 24 Vdc electrical system.

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A-A-52482B

2.4.1 Salt spray resistance. The switch shall meet the requirements of 2.3.1 during and after exposure to a fog of atomized salt water of 5 percent salt solution for 200 hours at 95 +2/-3 degrees Fahrenheit (°F).

2.4.2 Sand and dust resistance. The switch shall meet the requirements of sc c.1 after exposure to sand and dust in an air velocity of 2500 ±500 feet per minute with humidity not exceeding 30% for 6 hours at 77°F, and 6 hours at 160°F.

2.4.3 Fungus resistance. The switch shall meet the requirements of 2.3.1, 2.3.2, 2.3.4, and 2.3.5 after exposure to fungus growth in air incubation cabinet for 90 days at a temperature between 75 and 85F and a relative humidity between 93 and 100 percent.

2.4.4 Waterproofness. The switch shall be mechanically and electrically operable during and after submersion in saline solution for 30 minutes at full rated current and voltage. No poor seals, leakage or other failure shall be evidenced. The switch shall subsequently meet the requirements of 2.3.1, 2.3.2, 2.3.4, and 2.3.5.

2.4.5 Temperature. The switch energized by a 28 V dc source shall be tested at extremes of low and high temperature; it shall be operated through its entire range 1000 times. For lamp loads, the load cycle shall be 1 ±0.1 second "on" and 5 ±0.1 seconds "off" (10 cycles per minute). The switch shall subsequently meet the requirements of 2.3.1, 2.3.3 and 2.3.5.

2.4.6 Low temperature resistance. The switch shall be placed in a cold chamber at -65 ±5F and conditioned for 24 hours prior to testing, then, with the chamber temperature constant at -65 ±5F the switch shall be operated and tested in accordance with 2.4.5. There shall be no evidence of degradation of electrical and mechanical performance. The operational torque shall not exceed by more than 40% of the operational torque of 2.3.5.

2.4.7 High temperature resistance. The switch shall be connected, conditioned and tested in accordance with 2.4.6 except that the temperature shall be 165° ±5°F.

2.5 Finish. Unless otherwise specified (see note b), the finish shall be as specified herein.

2.5.1 Painting. Cleaning, pretreatment, priming, and painting shall conform to an appropriate CARC paint system selected from Drawing 12369000. Color of paint top coat shall be green 383, 34094.

2.5.2 Plating. Cleaning, pretreatment, priming, and painting shall conform to an appropriate CARC paint system selected from Drawing 12369000. Color of paint top coat shall be green 383, 34094.

2.6 Identification marking. Identification marking shall be permanent and legible and shall include, as a minimum, the part identification number (PIN) A52482-1 and the manufacturer's CAGE code and part number (see 5.2). Identification and marking shall be accomplished without adversely affecting the acceptability and function of the finished product.