scope:

This specification covers 28-volt (V) direct-current (dc) maximum, push, pull, and headlight beam-selecting switches (see 6.1).

Switches shall be of the following types, arrangements, classes, and grades, in the combinations specified (see table I and 6.2):

Type I - Push; single-pole, single-throw, momentary operation, light duty. Type II - Beam selecting, headlight; single-pole, double-throw. Type III - Beam selecting, headlight; multi-pole, double-throw. Type IV - Push; single-pole, single-throw, momentary operation, heavy duty. Type V - Pull; single-pole, single-throw, pull-latch disconnect.

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: US Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter.

Arrangement 1 - Normally open.

Arrangement 2 - Normally closed.

Arrangement 3 - No open.

Class A - Slow make and break.

Class B - Fast make and break.

Grade 1 - Watertight (operable during immersion).

Grade 2 - Open (waterproof, but not operable during immersion). TABLE I. Combination of types, arrangements, classes and grades.

Arrangement Class Grade Type 1 2 3 A B 1 2 --------------------------------------------- I X X X I X X X I X X X I X X X I X X X I X X X I X X X I X X X II X X X III X X X IV X X X IV X X X V X X X

intended Use: