MIL-DTL-23020C
3.9 Watertightness. When tested as specified in 4.4.2, the leakage in a 2-hour period shall not
exceed the value specified in the specification sheet.
3.10 Dimensions. The manufacturer of cables to this specification shall provide the necessary
equipment to monitor continually the physical dimensions of the cable core and overall diameter.
3.11 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible, provided that the
material meets or exceeds the operational and maintenance requirements, and promotes economically
advantageous life cycle costs.
3.12 Marking. Shipment marking information shall be provided on both flanges of each reel in
accordance with the contractor's commercial practice. The information shall include the following:
a.
Cable description.
b.
Federal stock number.
c.
Number and size of conductors.
d.
Quantity (footage of all lengths).
e.
Contract or order number.
f.
Contractor's name or manufacturer's Cage code.
g.
Year of manufacture.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
follows:
a. First article inspection (see 4.2).
b. Conformance inspection (see 4.3).
4.2 First article inspection. First article inspection shall consist of the tests of MIL-DTL-17 with
the exceptions and additions specified in 4.4. Prior to beginning production, a sample shall be tested as
specified and the sample shall be from production tools, and shall be a minimum of 250 feet (76.2 m)
long.
4.3 Conformance inspection. Conformance inspection shall be in accordance with acceptance
inspection of MIL-DTL-17.
4.3.1 Unit of product. For purposes of this specification, a unit of product shall be defined as 1000 feet
(304.8 m) cable having the sample type designation.
4.4 Test procedures.
4.4.1 Cold working. A 20-foot (6.1 m) sample from each reel shall be conditioned for not less than 20
hours at -54º + 0-5ºC. Immediately thereafter but while the specimen is still in the cold chamber at the
conditioning temperature, the specimen shall be drawn at a rate of not less than 100 feet (30.5 m) per
minute over a roller having a diameter of 12 inches (0.3 m), in such a manner that a "U" bend of 180
degrees is imposed progressively on the entire length. The specimen shall then be drawn in the reverse
direction at the same rate. It shall be drawn alternately forward and backward, for a total of four times in
each direction. The specimen shall then be removed from the cold chamber and visually examined for
evidence of cracks or flaws in the dielectric material or jacket. A length of the cable employed in the cold
working test shall then meet the requirements of 3.8.
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