MIL-STD-681-SUP Identification Coding and Application of Hookup and Lead WireThis standard establishes identification coding systems for all insulated hookup and lead wire used in electrical and electronic equipment by the Departments of the Army, Navy, and Air Force. These coding systems should also be used for identifying lead wires on Hall generators and ac and dc wire coding methods specified see 4.9 and 4.10.

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MIL-STD-681F

4. GENERAL REQUIREMENTS

4.1 Coding of hookup wire. All hookup wire shall be coded by one or more of the systems listed in 1.2.

4.2 Coding of interconnecting wiring. Coding of interconnecting wiring (system IV) need not apply to jacketed cables.

4.3 Abbreviations. Abbreviations shall be in accordance with ASME Y14.38.

4.4 Shielded and unshielded wires. All requirements for all systems shall apply to both shielded and unshielded wires.

4.5 Color limits. Unless otherwise specified, all colors on the finished wire shall conform to class 1 colors of MIL- STD-104.

4.5.1 White, clear, and neutral insulations. The term "white" shall apply only to colors meeting the requirements of "white" in MIL-STD-104. Clear or translucent uncolored (unpigmented) insulation shall be designated "clear". Natural or neutral colored insulations shall be designated "neutral" (see 4.6).

4.6 Clear and neutral colored insulations. Clear and neutral colored insulations shall be used on wires in lieu of white insulation only when specified by the applicable wire specification.

4.7 Lead wires. Lead wires used for motor leads, transformer leads, and similar applications shall be color coded in accordance with table I, where no conflict would be created with another component color-code standard.

4.8 Hall generator leads. Hall generator lead wires shall be color coded in accordance with table II.

4.9 DC power wiring for chassis and interconnecting systems. DC power wiring for chassis and interconnecting wiring shall be color coded in accordance with table II or table III.

4.10 AC power wiring in assembled units. AC power wiring in assembled units shall be color coded in accordance with table IV.