MIL-DTL-3702F
TABLE II. Outside diameter.
1/
Diameter inch (mm)
Cable
diameter
Actual
designation
Nominal
Minimum
Maximum
5
.196 (4.98)
.206 (5.23)
.197 (5.00)
7
.270 (6.86)
.285 (7.24)
.276 (7.01)
1/ Dimensions are in inches. Metric equivalents are given for information only.
3.3.7.2 Length. The maximum length of any piece of cable longer than 200 feet shall be determined
by the size of the reel or spool with relation to convenience in handling, shipping, and storing. The drum
of the reel or spool shall be not less than eight inches in diameter. Not more than 30 percent of the cable
in each order shall be delivered in lengths of 50 to 200 feet, and the remaining cable shall be in lengths
not less than 200 feet (see 6.2).
3.3.8 Finish. Unshielded cable shall have an even, smooth, exterior finish. The finish shall also
ensure that adjacent layers of the cable do not adhere when wound on reels or spools for shipment or
storage, at temperatures up to 160ºF.
3.4 Performance.
3.4.1 Tensile load. The cable shall withstand a tensile load of 55 pounds for not less than 1 minute.
There shall be no evidence of rupture or separation of cable components during or after being subjected
to the tensile load and immersion in an aqueous sodium chloride solution (see figure 1 and figure 2).
3.4.2 Maximum voltage. The cable shall resist, without failure, maximum voltage with the
potentials as follows:
Cable diameter 5: 30 kilovolts, root mean square (rms)
Cable diameter 7: 34 kilovolts, rms
3.4.3 Insulation flaws. Before shielding is applied, unshielded and shielded cables shall be free of
insulation flaws. Certification shall be provided with the completed cables that insulation flaws detected
have been removed from the defective sections of the cable.
3.4.4 Capacitance. The dielectric constant of the insulation used on the completed cable shall be
such that the capacitance is not more than the values shown in table III.
TABLE III. Capacitance.
Capacitance per foot of cable
picofarads (pf)
Cable diameter
Copper
Copper
Steel
designation
conductor
conductor
conductor
19 strands
37 strands
7 strands
5
46
--
37
7
40
52
33
3.4.5 Life cycle. The unshielded and shielded cable, before the shield is applied, shall meet the
requirements of maximum voltage specified in 3.4.2 after exposure to all environmental conditions
expected during its life cycle.
8
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