MIL-DTL-3702F
3.2.5 Shielding. Unless otherwise specified (see 6.2), shielding for low temperature cable
shall be tin plated copper, and for medium temperature cable shall be silver or nickel-plated copper
wire having a plate thickness of not less than 100 µin. Unless otherwise specified, high
temperature cable shielding shall be nickel or nickel-clad copper having a plate thickness of not
less than 100 µin.
3.3 Design and construction.
3.3.1 Unshielded cable. The construction of unshielded cable shall be copper or steel
conductor with insulation, a layer of braid, and a sheath.
3.3.2 Shielded cable. The construction of shielded cable shall add a shielding to
unshielded cable as described in 3.3.1.
3.3.3 Conductor. The conductor shall be continuous throughout its length, except that
individual wires may be spliced (see 3.3.3.2). The number of individual wires and the
diameter of the wire in the conductor shall be specified in table I. The conductor shall be
free of abrasions, kinks, and flats. Individual wires shall be free of lumps, kinks, splits,
abrasions, and scraped or corroded surfaces.
TABLE I. Conductor wire.
Conductor
Wire diameter
2/
AWG
Number of strands
1/
inches (mm)
material
Min
Max
Copper
19
0.0111 (.28) 0.0116 (.29)
29
Copper
37
0.0111 (.28) 0.0116 (.29)
29
Steel
7
0.0126 (.32) 0.1134 (2.88)
28
1/ Dimensions are in inches. Metric equivalents are given for information only.
2/ American Wire Gage (AWG) size
3.3.3.1 Stranding. All stranding for conductors shall be left hand lay. The stranding for
copper conductors shall be bunched or concentric. The stranding for steel conductors shall
be concentric. When an uninsulated portion of the conductor is cut, the stranding shall not
tend to unlay and the completed conductor shall not tend to spread out.
3.3.3.2 Splicing. The splicing of individual wires is acceptable provided the splicing is
accomplished in such a manner that the diameter of the conductor and the performance of the
cable is not affected. The splices shall conform to the requirements of A-A-59551.
3.3.3.3 Eccentricity. The eccentricity of the conductor (at any specified cross-section) in
relation to the completed cable shall not exceed 6 percent of the cable diameter when
calculated by the following equation:
(X - Y )100
Eccentricity, (percent) =
2D
where:
X = maximum cable wall thickness, in inches
Y = minimum cable wall thickness, in inches
D = diameter of cable, in inches
6
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business