MIL-DTL-28781E
3.2.6.3 Jacket thickness and outside cable diameter. The jacket thickness and outside cable
diameter shall be as specified in table III. The minimum spot thickness of the jacket shall not be less than
70 percent of the specified thickness. The average thickness at any cross-section of the jacket material
shall be not less than 90 percent of the specified thickness.
TABLE III. Jacket thickness and outside diameter (OD).
Nominal jacket thickness
Approx. OD
No. of pairs
inches
millimeters
inches
millimeters
1
.050
1.270
.227
5.765
3
.050
1.270
.315
8.001
6
.050
1.270
.388
9.855
16
.062
1.5748
.506
12.852
26
.062
1.5748
.615
15.621
52
.062
1.5748
.781
19.837
104
.070
1.778
1.137
28.900
3.2.6.4 Cold bend for jacket material. A sample of the finished cable shall show no evidence of
cracking or fracturing.
3.2.7 Cable marking. A tape shall be permanently marked and inserted between the jacket and
shield. The length shall be marked every 12 inches (304.8 mm). The tape shall be marked at least every
24 inches (609.6 mm) with the following:
a. Manufacturer's name (or symbol designation).
b. Date of manufacture.
c.
Contract number.
d. Specification number.
3.3 Electrical requirements.
3.3.1 Mutual capacitance. The average mutual capacitance of all pairs in a completed reel of cable
of three or more pairs shall not exceed .152 microfarad (µF) per 1 mile (1.609 kilometers). The average
mutual capacitance of all pairs also shall not exceed .160 µF per 1 mile for cables of less than three pairs.
The mutual capacitance test shall be performed in accordance with 4.6.2. NOTE: The objective is the
lowest practical average mutual capacitance with all individual pair mutual capacitances as close as
practical to the average value for the reel.
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