MIL-DTL-55036C
at a temperature no less than 60 °F. The mutual capacitance of a pair is that measured between the 2
wires of a pair, the remainder of the conductors being connected to the braid, which shall be grounded.
4.7.6 Capacitance unbalance. Each cable length shall be tested for compliance with the requirements
of 3.2.6. Capacitance unbalance shall be measured between each pair and its adjacent pairs in each
layer, and between each pair in a layer and all other pairs in adjacent layers.
4.7.7 Attenuation. Each cable length shall be tested for compliance with the requirements of 3.2.7.
st
nd
One pair from the center layer, 2 pairs from the 1 layer, and 3 pairs from the 2 layer shall be selected
at random and tested for attenuation.
4.7.8 Spark test. The finished cable shall be run through a drag chain spark tester at a speed sufficient
to enable any point of the cable to be subjected to the voltage in 3.2.8 for .025 seconds minimum.
4.8 Mechanical tests (see 3.3).
4.8.1 Low temperature test after aging. Twelve samples of cable WM-130( )/U shall be subjected to air
oven aging and cooling as outlined in 4.6.11.1. The samples shall then be subjected to the tests of 4.8.1
4.8.1.1 Low temperature requirement at 40 °C. Six samples of the completed cable and a test
mandrel whose diameter shall be 1.688+ 0.005 inches (42.88 mm +.13 mm) shall be placed in a cold
chamber maintained at a temperature of 40+1 °C for 24 hours. At the end of this time, and while still in
the cold chamber, the cable shall be wound around the mandrel for 7 close turns. No object having a
higher temperature than 40+1 °C shall come within 12 inches (305 mm) of the part of the specimen
which is under test (see 3.3.1).
4.8.1.2 Low temperature requirement at 55 °C. Six samples of the completed cable and a test
mandrel whose diameter shall be 3.75 inches + 0.010 inches shall be placed in a cold chamber
maintained at a temperature of 55+1 °C for 24 hours. At the end of this time, and while still in the cold
chamber the cable shall be wound around the mandrel for 3 turns at a slow rate. No object having a
higher temperature than 55+1 °C shall come within 12 inches (305 mm) of the part of this specimen
which is under test (see 3.3.1).
4.8.2 Breaking strength. Three samples of cable shall be tested from every 10,000 feet of cable
produced or every ten days, whichever comes first. The sample shall be tested using cable grip shown
on CECOM DWG SM-B-159154. The grip shall be secured to a stationary object with a minimum of four
feet of cable within the grip. The other end of the cable shall be wound on a mandrel and static load shall
be applied between the cable, the cable and the cable grip. The ferrule on the cable grip may be
encased in a protective device to prevent collapse of the ferrule when under stress (see 3.3.2).
4.8.3 Flexing. The end of one cable length shall be subjected to the flex test as specified on figure 1
using a bending diameter of .625+ .0156 inch (15.86+.397 mm). The test shall be conducted at room
temperature. The samples shall meet the requirements of 3.3.3.
4.8.4 Twisting. The end of one cable length shall be subjected to the twist test as specified on
figure 2. The test shall be conducted at room temperature. The sample shall meet the requirements of
4.8.5 Impact. The end of one cable length shall be subjected to the impact test as specified on
figure 3. The test shall be conducted at room temperature. The sample shall meet the requirements of
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