MIL-DTL-5846D
TABLE VIII. Temperature coefficients - Continued.
Temperature
Temperature
Coefficients
of Insulation
Degrees F
Degrees C
60
15.5
1.00
62
16.7
1.26
65
18.3
1.80
68
20.0
2.50
71
21.7
3.50
74
23.3
5.00
77
25.0
6.60
80
26.7
8.30
83
28.3
11.0
86
30.0
17.5
89
31.7
24.5
92
33.3
34.0
95
35.0
48.0
4.3.6 Temperature aging. One inch of the insulation shall be removed from each end of a
36-inch specimen of the finished wire. The specimen shall be suspended in a suitable test
chamber without touching the walls of the chamber. The chamber shall be maintained at
a temperature of 100° ±2° C. The heated air, at atmospheric pressure, in the chamber
shall be circulated so as to maintain a uniform temperature. The specimen shall be
subjected to this temperature for a period of 96 hours and then subjected to the bend,
dielectric, and insulation resistance tests, respectively. (see 3.4.3)
4.3.7 Bend. One end of the specimen shall be secured to a mandrel and the other end to
the load weight specified in Table IX. The mandrel shall be rotated until the full length of
the specimen is wrapped around the mandrel and is under the specified tension with
adjoining coils in contact. The mandrel shall then be rotated in the reverse direction until
the full length of the specimen is wrapped around the mandrel as before, except that the
reverse surface of the wire is in contact with the mandrel. This procedure shall be
repeated until two bends in each direction have been formed in the same section of the
wire. When this test is conducted on duplex wire, the bend shall be made on the minor
diameter of the wire. (see 3.4.3)
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