MIL DTL-16878/31B
Spark test voltage:
5.0 kV
Impulse dielectric test voltage:
10 kV, or 7.1 kV using the 3.0 kHz spark test
Dielectric withstanding voltage:
3.0 kV
Insulation resistance:
IR = K log10 D/d
Where: IR = Minimum insulation resistance in megohms
per 1000 feet at 20 °C
K = 1,000
D = Maximum average diameter of finished wire
d = Conductor diameter
Condition 4 hours at -55±1 °C (see table II). The
Cold bend:
braid shall not open up as a result.
TABLE II. Cold bend mandrel sizes.
Cold bend mandrel diameter
Wire size
(inches, maximum)
24, 22
1
20 through 12
2
10 through 6
3
4, 2
4.5
1, 0
6
00, 000, 0000
10
Surface resistance:
5 megohm-inches (minimum)
Condition at 250 °C
Heat resistance:
Heat aging:
Not required
Insulation tensile strength:
700 pounds force per square inch (minimum, braid shall be
removed prior to testing.
Insulation elongation:
125 percent (minimum, braid shall be removed prior to
testing.
Fungus resistance:
Not required
Marking and stripe durability:
Not required
CHANGES FROM PREVIOUS ISSUE. Marginal notations are not used in this revision to identify
changes with respect to the previous issue because of the extensiveness of the changes.
CONCLUDING MATERIAL
Custodians:
Preparing activity:
Navy - SH
DLA - CC
Air Force - 11
DLA - CC
(Project 6145-2193-015)
Review activity:
Navy - AS
3