MIL-DTL-24643C
3.3.11.2 Glass braids. Glass braids for use on silicone insulated conductors shall be composed of the
appropriate size of either staple or continuous fiber in accordance with MIL-Y-1140.
3.3.12 Tie cords. Tie cords shall be of synthetic fiber having a maximum diameter of 0.065 inch and a
minimum breaking strength of 30 pounds.
3.3.13 Separators. Separators, when required, shall be of a material that is compatible with other cable
3.3.14 Binders. Binders shall be of a material compatible with the other cable materials. The compatibility of
3.3.15 Armor wires. The armor wires shall consist of Alclad 5056 or 5154 aluminum alloy or equivalent
having a diameter of 0.0126±0.0005 inch. A minimum tensile strength of 50,000 pounds per square inch (lb/in2) and
a minimum elongation (before application to the cable) of 2 percent in 10-inch length.
3.3.16 Fungus resistance. All nonmetallic materials shall be fungus inert and shall be certified that they meet
the requirements of ASTM G21 with a growth rating of 1 or less.
3.3.17 Hazardous items and toxic materials. The material shall have no adverse effect on the health of
personnel when used for its intended purpose. Questions pertinent to this effect shall be referred by the contracting
activity to the appropriate department medical service who will act as an advisor to the contracting agency.
Regardless of any other requirements, materials and parts containing asbestos, mercury or mercury compounds, or
those giving off excessive toxic fumes (see 4.8.28) shall not be used.
3.3.18 Materials control. All materials included in the construction of the cable shall be examined and tested to
ensure conformance to this specification and applicable specification sheet. Once a cable construction has been
fully qualified, no materials may be added, deleted, or modified. Any addition, deletion, or modification of
materials within a cable construction shall require requalification.
3.3.19 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.
3.3.20 Electrical moisture absorption. The maximum increase in capacitance, from 1-14 days shall be 10
percent and the maximum from 7-14 days shall be 4 percent.
3.3.21 Temperature and humidity. After exposure to temperature and humidity conditions of 4.8.34, the cable
shall meet the attenuation requirements specified in the applicable specification sheet.
3.3.22 Stress resistance. When stressed in accordance with the conditions of 4.9.13, the cable shall meet the
measurements as specified in 4.9.13.2.
3.4 Design and construction.
3.4.1 Fillers and binders. Fillers and binders may be used to provide firmness and roundness of completed
cables and to provide watertightness when required by the specification sheet. Filler and binder material shall be
compatible with other cable components. Compatibility of components shall be determined in accordance with
3.4.2 Shields.
3.4.2.1 Braided shields. When specified in the applicable specification sheet, braided shields shall be of the
pushback type and shall be constructed to conform to the physical and electrical requirements specified in the
applicable specification sheet. The shield shall be of a close-fitting braid construction and shall be free from
irregularities and discontinuities. Individual wire strands may be spliced, but not more than one carrier may be
spliced at any one point. When the braided shield is cut, it shall be capable of sliding back not less than 4 inches on
an exposed 24-inch length of component wire or cable with the opposite end clamped.
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