MIL-DTL-24640/22E
TABLE I. Construction details.
Component
Cable
Jacket
Cable weight
Conductor
wire diameter
diameter
PIN
Type
AWG
thickness
(pounds per
resistance
(inch)
(inch)
M24640/22
number
size
(inch)
1000 feet)
per 1000
(min.)
(max.)
feet (ohms)
(min.)
(max.)
(min.)
(max.)
-01UN
7XW-3
16
0.075
0.081
0.038
0.315
0.339
110.0
4.35
-02UN
7XW-4
14
0.091
0.097
0.041
0.374
0.404
162.0
2.88
REQUIREMENTS:
Qualification required.
Construction details: See table I.
Component wire: For polyimide tape constructions, the following additional tests shall be applicable in
accordance with MIL-DTL-81381.
Temperature rating
150 °C (302 °F) (max.) conductor temperature
Voltage rating
600 volts (root mean square) at sea level
Blocking
Oven temperature, 150±2 °C (392±3.6 °F) no sticking of
conductors
Flammability
3 seconds (max.) after flame
3.0 inches (max.) flame travel
No flaming of tissue paper
Humidity resistance
5 megohms for 1000 feet (min.) insulation resistance after
humidity exposure
Impulse dielectric test
8.0 kV, 100 percent impulse test
Insulation resistance
2500 megohms for 1000 feet (min.)
Polyimide cure test
No cracking
Shrinkage
0.062 inch (max.) at 180 °C
Surface resistance
5 megohms inches (min.), initial and final readings
Thermal shock
Oven temperature, 150±2 °C (302±3.6 °F)
Maximum change in measurement
0.031 inch
Wet dielectric test
2500 volts (root mean square)
INSPECTION:
Basic Electricals:
Conductor resistance (ohms/1000 feet at 25 °C, max.)
See table I
Voltage withstand (volts, root mean square, min.)
Conductor to conductor
2000
2
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