MIL-DTL-10392 Cord, Electrical \(Audio, Miniature\)This specification covers miniature audio cords with stranded wire conductors for use switch microphones, telephone, switchboards, and associated communication equipment. These cords are intended for use at potentials up to 300 volts \(rms\) at audio frequencies, and at temperatures from -40 degrees to +75 degrees C \(see 3.2 for individual types.\)

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MIL-DTL-10392F

TABLE II. Color code of cords WM-69B/U, WM-70B/U and WM-111A/U.

Cord type

Conductor size (AWG)

Color

WM-69B/U

White

Red

Green

Blue

Brown

Yellow

WM-70B/U

White

Black

Red

Green

Orange

Blue

Brown

Yellow

WM-111A/U

White

Black

Red

Green

Blue

Brown

Yellow

3.9 Conductivity of fibers and yarns. The conductivity of the solution prepared from any part of the

fibers or yarns used as servings, binders, braid, core, separators, fillers, or stay cords, removed from the

cord, shall not exceed 50 micro-ohms per cubic centimeters, when tested as specified in 4.5.11.

3.10 Fillers. Filler materials shall be a ply yarn in accordance with MIL-C-572, type P or CTA or

polyester fiber, polypropylene yarn, or polypropylene filament.

3.11 Staycords. Staycord material shall be in accordance with MIL-C-572, type P or PAA or

polyester fiber or polypropylene fiber.

3.11.1 Staycord for WD-27A/U. Cord WD-27A/U shall contain one staycord. The staycord shall

have a minimum breaking strength of 50 pounds.

3.11.2 Staycord for WM-69B/U. Cord WM-69B/U shall contain two staycords. Each staycord shall

have a minimum breaking strength of 25 pounds.

3.11.3 Staycords for WT-15A/U, WF-11A/U, WM-59A/U, WM-60A/U, WM-61A/U, WM-62A/U, WM-

63A/U, WM-64A/U, WM-70B/U and WM-111A/U. These cords shall each contain one staycord. The

staycord shall have a minimum breaking of 60 pounds.

3.12 Cabling. Cabling of the cords shall be as indicated below. The length of lay of the insulated

conductors shall be as specified in table I. The staycord or staycords shall be at or near the center of the

core, and shall not be twisted together with the insulated conductors. Fillers shall be used in the

interstices between the conductors to form an essentially round core prior to jacketing.

3.12.1 Cord WM-69B/U. The insulated conductors of cord WM-69B/U shall be twisted around two

parallel staycords in the configuration specified on figure 1.