MIL-DTL-3702F
4.7.3.6.7.1 Preparation. A 5-pound weight shall be firmly attached to the conductor of one end of the
specimen. The other end of the specimen shall be attached to a 1 inch (25.4 mm) diameter, smooth,
cylindrical mandrel in such a manner that the weight shall be freely suspended by the specimen. The
mandrel shall be rotated to wind the specimen against the gravitational pull exerted by the attached
weight for five full wraps or turns spaced .75 inch (19 mm) apart as shown on figure 3. During winding,
the specimen shall not be constrained against normal twisting.
4.7.3.6.7.2 Aging. One of the specimens on the mandrel shall be heated for 1 hour in an oven at
600±8 °F for high temperature cable, 450±4°F for medium temperature cable, and 250±4 °F for low
temperature cable, and thereafter cooled for 30 minutes in air at room temperature.
4.7.3.6.7.3 Insertion in metal test sleeve. The specimen previously heated shall be fitted snugly
inside a metal sleeve having belled ends, in such manner that the ends of the specimen protrude from the
belled ends of the sleeve (see figure 3). The specimen wound at room temperature, and not aged, shall
also be fitted in the same manner.
4.7.3.6.7.4 Voltage application. With mandrel and metal test sleeve in position, immediately after
insertion in sleeve, each specimen shall be subjected to a potential of 15 kilovolts rms applied between
the cable conductor and the mandrel and sleeve at 60 Hz. Specimens shall be subjected to the voltage
application for 6 hours, after which examination shall be made for burning over the ends, insulation
rupture, deterioration, or other resulting damage. The specimens shall then be subjected to the test
specified in 4.7.3.2.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When actual 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
packaging activities within the Military Service or Defense Agency, or within the military service's system
command. Packaging data retrieval is available from the managing Military Service or Defense Agency's
automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
6.1 Intended use. The cable covered by this specification is intended for use on ignition systems of
internal combustion engines for aircraft, automotive vehicles, marine vehicles and applications, and
portable power service equipment. Retention of this specification as a detail specification is required due
to the use of a Qualified Products List (QPL) for acquiring and procuring these cables.
6.1.1 Unshielded. Unshielded cable is intended for use in high-tension ignition systems and requires
the use of shielding or other methods for radio-interference suppression.
6.1.2 Shielded. Shielded cable is intended for use where shielding of individual cables for radio
interference is required.
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