MIL-DTL-13075C
4.3.2.2 Wire W-128. Wire W-128 shall withstand a test voltage of 12,500 volts rms.
4.3.3 Insulation resistance. For the insulation resistance test, an electromotive force of not less than 100
volts dc shall be used, the conductor being maintained negative with respect to the water. The insulation
resistance shall be computed from the galvanometer deflection obtained after electrification of one
minute. If measurement is made at other than the specified water temperature, the measured insulation
resistance shall be multiplied by a coefficient corresponding to the measurement temperature. The
contractor shall demonstrate that the coefficient is accurate for his compound. In making the insulation
resistance test, the test may be terminated in less than one minute if the galvanometer has ceased
fluctuating and the reading indicates that the required minimum insulation resistance has been obtained.
However, test results on 5% of the lengths after one minute electrification shall be recorded to permit a
continuous check on quality.
4.3.4 Electrostatic capacitance and power factor. For wire W-124, the test shall be conducted on the
finished wire (with the braid on). For wire W-125, the common outer braid shall be removed from the
sample and the test performed separately on each one of the braided conductors. The sample shall be
dried in an oven at a temperature of 80 ± 3 °C for a period of 18 hours. When the sample has cooled to
room temperature, it shall be insulated at one end with a suitable wax and immersed in mercury, and the
capacitance between the conductor and the mercury measured by means of capacitance bridge at a
frequency of 1 megacycle per second.
4.3.5 Continuity. Each finished length of wire shall be tested to verify continuity using a potential of not
more than 7 volts dc.
4.3.6 Conductor insulation tests. Physical properties and cold bend tests of the Buna-S insulations shall
be performed as specified in with 3.3.2.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD personnel, or
in-house contractor personnel, these personnel need to contact the responsible packaging activity to
ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control
Point packaging activities within the Military Service or Defense Agency, or within the military service's
system command. Packaging data retrieval is available from the managing Military Service or Defense
Agency's automated packaging files, CD-ROM products, or by contacting the responsible packaging
activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
6.1 Intended use. The wire covered by this specification is most commonly used in antenna and ground
connections. This specification is retained as a military detail specification because of the unique military
requirements for testing to ensure the integrity of any conductor joints.
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