MIL-DTL-38359E
4.4.6.1 Rejection and retest. When cable selected from a production run fails to meet the
specification, no cable still on hand or produced later shall be accepted until the extent and cause of
failure have been determined and appropriately corrected. The contractor shall explain to the
Government representative the cause of failure and the action taken to preclude recurrence. After
correction, all tests shall be repeated.
4.4.6.1.1 Individual tests may continue. For production reasons, the individual and sampling tests
may be continued pending the investigation of a sampling test failure. Final acceptance of cable on hand
or produced later shall not be made until it is determined that all cable meets all the requirements of the
specification.
4.4.7 Defects in cable already accepted. The investigation of a test failure could indicate that defects
may exist in cable already accepted. If so, the contractor shall fully advise the acquiring activity of all
defects likely to be found and the method of correcting them.
4.5 Testing and inspections.
4.5.1 Test equipment and inspection facilities. Test and measuring equipment and inspection
facilities of sufficient accuracy, quality and quantity to permit performance of the required inspections shall
be established and maintained by the contractor. The establishment and maintenance of a calibration
system to control the accuracy of the measuring and test equipment shall be in accordance with
NCSL Z540.3 and ISO 10012-1.
4.6 Methods of inspection.
4.6.1 Test methods. The following identified tests and test methods assure cable integrity within
typical operating conditions and application. Alternate commercial industry standard test methods are
allowed, however, when an alternate method is used, the qualifying activity must be notified prior to
performance of the test. The test methods described herein are proven methods and shall be the referee
method in cases of dispute.
4.6.2 Visual inspection. All cable shall be inspected to ascertain compliance with this specification
with respect to material, design, and construction, workmanship stranding and marking.
4.6.3 High potential withstanding voltage test. Each reel of cable shall withstand the high potential
specified in table I without failure. The test shall be conducted on final shipping reels of cable. For cable
supplied on reels containing short lengths of cable, the test may be conducted on reels used for such
tests prior to winding on the shipping reel. The high-voltage tests shall be conducted with an alternating
current potential from a transformer and generator of ample capacity, but in no case less than 5 kVa. The
frequency of the test voltage shall be 60 hertz with a wave shape approximating a sine wave. The initially
applied voltage shall be not greater than the rated voltage. The rate of increase shall be approximately
uniform and not over 100 percent in 10 seconds nor less than 100 percent in 60 seconds. The reel of
cable shall be immersed in a grounded water bath at a temperature of approximately +20 ºC for 6
consecutive hours and, while still immersed, it shall be subjected to the test potential. The potential shall
be applied between the conductor and ground. The duration of the tests shall be 5 minutes.
4.6.4 Insulation resistance test. Each reel of cable shall be tested in accordance with
NEMA WC 71 to determine compliance with the insulation resistance requirements. This test shall be
conducted immediately following the test specified in 4.6.3 .
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