MIL-DTL-8777F
3.4.4.8 Flammability. The wire shall withstand the test specified in 4.6.4.8.2 without electrical
breakdown. The wire shall withstand the test specified in 4.6.4.8.3, during which the flame rate of travel
along the wire shall not exceed 3 inches per minute, and the wire shall be self-extinguishing within 30
seconds after removal of the flame. Burning particles or drippings shall not cause the tissue paper to
burst into flames. Charred holes or spots in the tissue paper shall not constitute failure.
3.4.4.9 Abrasion resistance. All wire shall meet the minimum requirements specified in the applicable
MS sheet, when tested as specified in 4.6.4.9. Following immersion in the fluid specified in 4.6.4.6, the
wire shall have not less than 70 percent of the abrasion resistance specified in the applicable MS sheet.
3.4.4.10 Humidity resistance. When tested as specified in 4.6.4.10, sizes 22 through 12 of the finished
wire shall have a humidity resistance as specified in the applicable MS sheet.
3.4.4.11 Insulation resistance. When tested as specified in 4.6.4.11, sizes 22 through 12 of the
finished wire shall have an insulation resistance as specified in the applicable MS sheet.
3.4.4.12 Surface resistance. When tested as specified in 4.6.4.12, sizes 22 through 12 of the finished
wire shall have a computed resistance as specified in the applicable MS sheet. Following the application
of a potential of 2,500 volts rms, 60 hertz, there shall be no evidence of distress, such as arcing, smoking,
burning, flashover, or dielectric failures.
3.4.4.13 Smoke. When tested as specified in 4.6.4.13, the finished wire shall not give off visible
smoke.
3.4.4.14 Thermal shock resistance. When tested as specified in 4.6.4.15, the insulation layer, or
layers, shall not exhibit shrinkage or expansion greater than 0.06 inch (1.52 mm). Flaring (separation of
adjacent layers) shall also constitute failure.
3.4.4.15 Stripping. The insulation of the finished wire shall be readily removable by wire-stripping
devices.
3.5 Marking. The finished wire shall be identified by a printed marking applied to the outer surface or
visible through the outer surface. The printed identification shall consist of the following, at intervals of
9 inches (228.60 mm) to 60 inches (1524.00 mm), as measured from the end of one complete marking to
the beginning of the succeeding complete marking:
a. MS or specification sheet Part or Identifying Number (PIN).
b. Manufacturer's Commercial and Government Entity (CAGE) code.
The printing shall be green in color as specified in MIL-STD-104, class 1. Identification printing shall be
applied with the vertical axis of the printed characters lengthwise of the wire when the nominal diameter
of the finished wire is .050 inch (1.27 mm) or smaller. The vertical axis of the printed characters may be
either crosswise or lengthwise of the wire when the nominal diameter of the wire exceeds 050 inch
(1.27 mm). All printed characters shall be complete and legible.
3.5.1 Marking durability. Identification printing shall be capable of withstanding repeated abrasions of
the durability test as specified in 4.6.4.16. Marking durability is not applicable when printing is under a
clear jacket, if used.
3.6 Workmanship. The wire shall be constructed and finished as specified in high-grade cable
production techniques. The wire shall be free from lumps, kinks, splits, abrasions, scraped or corroded
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