MIL-DTL-13486E
4.7.4.10 Ozone resistance. The specimens shall be tested using the ozone test apparatus. The
specimens shall be wrapped once around the appropriate mandrel and the two ends of the cable shall be
bound together with twine or tape at the point where they intersect. After being placed on the mandrel,
the specimens shall be conditioned at ambient room temperature for 45 minutes. The specimens shall
then be placed in the test exposure chamber for 300 hours for the qualification test and for 168 hours for
the control test. The tests shall be conducted at 100±5 °F. Immediately after the completion of the test
period, each sample shall be examined for evidence of cracking using 7-power magnification. The bound
and taped portion of the cable and the area adjacent thereto shall not be examined. Immediately after
the examination, each sample shall be subjected to the high voltage to ground test specified in 4.7.4.2.
4.7.4.10.1 Ozone test apparatus. The ozone test apparatus shall include an exposure chamber
containing air mixed with ozone in the proportion of 50±5 parts per 100 million parts of atmospheric air by
volume, and mandrels of the size appropriate for the test specimen as specified below:
Cable OD
Mandrel diameter
Less than 1/2 inch
4 times the cable OD
At least 1/2 inch but less than 3/4 inch
5 times the cable OD
At least 3/4 inch but less than 1-1/4 inch
6 times the cable OD
At least 1-1/4 inch but less than 1-3/4 inch
8 times the cable OD
At least 1-3/4 inch and above
10 times the cable OD
4.7.4.11 Longitudinal shifting (class B only). The specimen shall be cut as shown on figure 2. The
sheath, tape, and filling compound shall be removed from one end of the cable as indicated. The
rectangular opening shall be cut no longer than necessary to sever one or two insulated conductors. The
end indicated on figure 2 shall be securely clamped in a fixture with the sample suspended vertically. A
mark shall then be placed on the lower end of an insulated conductor that has been severed through the
rectangular opening. The mark shall be at the point where the loose insulated conductor meets the
sheath. A 20-pound weight shall be attached to the conductor and suspended freely for 5 minutes. The
distance of the mark from the sheath shall then be measured to determine longitudinal shifting of the
insulated conductor.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house
contractor personnel, these personnel need to contact the responsible packaging activity to ascertain
packaging requirements. Packaging requirements are maintained by the Inventory Control Point's
packaging activities within the Military Service or Defense Agency, or within the military service's system
commands. Packaging data retrieval is available from the managing Military Department's or Defense
Agency's automated packaging files, CD-ROM products, or by contacting the responsible packaging
activity.
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