MIL-DTL-25038J
wet dielectric test (4.6.6).
dielectric test (4.6.6). Testing of specimens 8 and 9 is not required for qualification inspection.
When specified by the contract or order (see 6.2), testing of specimens 8 and 9 shall be added
to the conformance inspection for flight critical applications.
TABLE V. Current for conditioning.
Size
Test current
(Amps)
22
4.5
20
5.5
18
9.0
16
11.5
14
16.5
12
21.0
10
28.5
8
37.5
6
52.0
4
70.0
2
94.0
1
105.0
0
127.0
00
146.0
000
169.0
0000
202.0
4.6.5 Bend. This test shall be conducted at room temperature. One end of a 3-foot specimen shall
be secured to a mandrel and the other end weighted. The mandrel diameter and test load shall be as
specified in the applicable specification sheet. The mandrel shall be rotated until the full length of the
specimen is wrapped around the mandrel. The process shall be repeated in reverse until the full length of
the specimen is again wrapped around the mandrel, but with the surface of the specimen previously
outside during the first wrapping now next to the mandrel. The procedure shall be repeated until two
bends in each direction have been formed in the same section of the specimen. At the completion of the
test, the insulation of the specimen shall be examined for visible cracks without magnification.
4.6.6 Wet dielectric. One inch of insulation shall be stripped from each end of a 3-foot specimen of
wire, and these uninsulated ends shall be fastened in metallic contact to a metal bar. The diameter of the
bend shall be not greater than 40 times the diameter of the specimen. The center 24-inch section of the
prepared specimen shall be immersed in a 5-percent solution of sodium chloride in tap water, at room
temperature, for not less than 5 hours. At the end of this immersion period, a potential of 1,500 V rms at
60Hz shall be applied for 1 minute between the conductor and an electrode in the salt water solution.
4.6.7 Fluid immersion. The following specimens of wire from 4.6.4 shall have their center 2-foot
section immersed in a fluid for 8 hours, using a separate specimen for each fluid:
12
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