MIL-DTL-28830E
4.7.4 Spark test (jacketed cable only) (see 3.5.3). Jacketed cables shall be tested in accordance
with method 6211 of FED-STD-228 (100% of cable shall be tested). The following details shall apply:
a. Unless otherwise specified (see 3.1), the test voltage shall be 60 hertz (Hz) root-
mean-square (rms) voltage as indicated in table X.
b. The potential shall be applied between the outer conductor and the outer surface of
the jacket.
TABLE X. Voltage for spark test.
Jacket thickness
Jacket thickness
Voltage (rms)
(minimum in inches)
(equivalents in millimeters)
.035
0.89
7,000
.060
1.52
9,000
.065
1.65
10,000
4.7.5 Insulation resistance (see 3.5.4). The cable shall be tested in accordance with method 6031 of
FED-STD-228 except that the cable shall not be immersed in water. The following details shall apply:
a. The test shall be performed on each length of complete cable.
b. The test voltage shall not be less than 200 volts.
c. The potential shall be applied to the inner conductor with the outer conductor
grounded.
4.7.6 Leak test (type I) (see 3.5.5). The capacitance of a 7-foot (2.1 meters) specimen shall be
measured and then the specimen shall be placed in a pressure tank filled with water so that at least 5
feet (1.5 meters) of the cable is immersed and both ends are exposed to air. The water shall then be
pressurized to 25 pounds per square inch gauge (psi) for at least 8 hours. The cable shall then be
removed and within 1 hour the capacitance shall again be measured. The capacitance measuring
system shall be accurate to within ± 1%.
4.7.7 Attenuation (see 3.5.6). The attenuation, expressed in dB per 100 feet (30.5 meters), shall be
measured at a sufficiently low-power level such that the resulting temperature rise will be negligible.
An acceptable method for measuring attenuation is as follows:
SIGNAL
GENERATOR
ATTENUATOR
ATTENUATOR
DETECTOR
AND
CABLE
PAD
PAD
CALIBRATED
ATTENUATOR
12
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business