MIL-DTL-3432J
3.2.2.1 Uninsulated ground drain wires. Uninsulated ground drain wires shall be in accordance with A-A-59551
and table V. Each ground drain wire shall have a green cover of fibrous braid, or extruded rubber or plastic (see
1.2.1.5.4, 3.2.6.2 and 6.3.4). When extruded rubber or plastic is used as a covering, it shall be marked "GND"
(ground) in contrasting color with a maximum of 3 inches intervals in accordance with MIL-STD-686.
3.2.2.2 Equipment ground wires. Equipment ground wires shall have green insulation (see 6.3.2).
3.2.3 Insulated conductors. Insulated conductors shall be free stripping and extruded over the conductors.
Insulated conductors shall be readily separated from each other. The minimum thickness, measured at a cross
section of the insulation, for various cable duties and conductor sizes, shall be specified in table VI. The minimum
insulation thickness, however, may be 80% of the nominal thickness at the area of contact between contiguous
insulated conductors. There shall be no kinking of the insulated conductor within the sheath. Polyethylene insulated
conductors of 24 through 12 AWG shall have 0.003 inch (.0762 mm) minimum thickness extruded jacket of
polyamide.
3.2.4 Shielding. Shielding shall be applied over the individual conductors, over two or more conductors, or over
the entire group of conductors, as specified (see 1.2.1.5.3). The shield shall consist of a braid providing a minimum
coverage of 85% (see 4.7.1). Irregularities, breaks, and discontinuities shall be avoided in the application. There
shall be no strands protruding through the insulation or the jacket. For insulated conductors in sizes 500 Kcmil to 10
AWG inclusive, the shielding shall consist of a single or double braid of strands, each strand having a nominal
diameter of .0063 inch (.16 mm). For insulated conductors in AWG sizes number 12 through 22 inclusive, the strand
shall be of .0050 inch (.127 mm) nominal diameter. For a shield applied over two or more conductors grouped
together, or over the entire group of conductors, when the diameter covered is .625 inch (15.9 mm) or less, the
shielding shall consist of a single or double braid of strands, each with a nominal diameter of .0050 inch (.127 mm) or
.0063 inch (.16 mm). When the diameter covered is more than .625 inch (15.9 mm), strands with a nominal diameter
greater than .063 inch (.16 mm) may be used for the braid.
3.2.4.1 Shield cover. For a single conductor, or two or more conductors grouped together under one shield, there
shall be a separator applied directly on the shield. When the diameter over the shield does not exceed .020 inch
(.508 mm), .0050 inch (.127 mm) to .0080 inch (.203 mm) thick polyamide may be extruded instead of polyester tape
over the shields that have polyethylene insulated components. For overall shield, there shall be an overlapping,
helical wrap of polyester or polypropylene tape applied over the cable core prior to shielding. (see 3.2.6.4).
3.2.5 Identification coding. The individual conductors of all cables and single wires shall be coded for their entire
length in accordance with MIL-STD-686.
a. The standard means of coding shall include the following:
(1) Solid-colored insulation with tracers, when required.
(2) Color-coded 1/2 to 1 mil polyester tape, with or without 1/2 to 1 mil heat-sealable adhesion.
(3) Color-coded 1 mil polyester tape with 1/2 to 1 mil heat-sealable adhesive in 8 AWG or larger, when tracers
are required.
(4) Color-coded, filled tapes in 8 AWG and larger, when tracers are not required.
(5) Coding by marking.
(6) Color code by green braid (ground wire only).
b. Color shall be in accordance with MIL-STD-104, class 1 for plastics and elastomers, and class 2 for
thermosetting compounds. Where black, blue, brown, purple, or red (i.e., two or more of these colors) are
used in the same cable, the colors (other than black) shall be light to nominal. Gray shall be dark (or slate)
when in the same cable with white.
3.2.5.1 Solid-color insulation. The entire thickness of plastic or rubber insulation shall be solid colored, when
practicable. When the entire thickness is not solid colored, insulation shall be applied over the inner core to form an
integral part of the insulation wall. Cables having up to and including six conductors shall employ solid coloring, and
each conductor shall be clearly distinguishable.
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