MIL-DTL-8777F
TABLE I. Wire construction details.
Maximum
Allowable
Nominal
Maximum
Nominal
resistance
Number
number
diameter of
diameter of
Wire
CMA 1/of
at 20ēC
of
of
individual
stranded
conductor
size
(68°F)
strands
missing
strands
conductor
(circular mils)
(Ω/1,000 ft.)
strands
inch/(mm)
inch/(mm)
22
755
19
0
0.0063 (.16)
0.033 (.84)
15.2
20
1,200
19
0
.0079 (.20)
.041 (1.04)
9.42
18
1,909
19
0
.0100 (.25)
.052 (1.32)
6.03
16
2,409
19
0
.0113 (.29)
.060 (1.52)
4.72
14
3,830
19
0
.0142 (.36)
.074 (1.88)
2.99
12
6,088
19
0
.0179 (.45)
.093 (2.36)
1.88
10
9,880
49
0
.0142 (.36)
.128 (3.25)
1.16
8
16,864
133
0
.0113 (.29)
.176 (4.47)
0.70
6
26,813
133
0
.0142 (.36)
.218 (5.54)
0.436
4
42,613
133
0
.0179 (.45)
.272 (6.91)
0.274
2
66,832
665
2
.0100 (.25)
.345 (8.76)
0.179
1
82,108
817
2
.0100 (.25)
.384 (9.75)
0.144
0
105,022
1,045
3
.0100 (.25)
.432
0.114
(10.97)
00
133,665
1,330
3
.0100 (.25)
.490
0.090
(12.45)
1/ Circular Mil Area (CMA)
3.4.1.3 Splices. Splices in individual strands shall be butt-brazed. Individual brazed splices in any
section of the conductor shall not occur closer together than 10 feet. Splices in any individual stranded
member, in rope-lay construction, shall be so finished off that the conductor diameter is not increased at
the point of brazing. In no case shall the whole conductor be spliced at one point.
3.4.1.4 Elongation. When tested as specified in 4.6.2.3, the individual strands from the conductor of
the finished wire shall withstand an elongation of 10 percent before breaking.
3.4.1.5 Conductor diameter. The diameter of the conductor of the finished wire shall be as specified in
table I.
3.4.2 Insulation.
3.4.2.1 Concentricity. The primary insulation shall be formed concentrically around the conductor.
When measured as specified in 4.6.3.1, the concentricity shall be not less than 70%.
3.4.2.2 Physical properties. When tested separately as specified in 4.6.3.2.1, the physical properties of
extruded primary insulation shall be not less than specified in the applicable MS sheet.
3.4.2.2.1 Physical properties after aging. When tested as specified in 4.6.3.2.2, extruded primary
insulation removed from finished wire shall have physical properties not less than the values specified for
aged samples in the applicable MS sheet.
3.4.2.3 Primary insulation flaws. After application of the primary insulation, and prior to the application
of any other material, all of the wire shall pass the test specified in 4.6.3.3 without failure.
3.4.3 Finished wire.
5
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