MIL-DTL-3432J
4.7.3. Voltage withstand. Cables shall be tested as specified in method 6111 of FED-STD-228. The following
exceptions shall apply:
a. The test shall be performed only on finished cables.
b. The source of power shall not be less than 5kVa.
c. The crest factor of the test voltage shall not differ by more than ±10% from that of a sinusoidal wave when the
transformer is loaded with the test specimen.
d. The immersion period shall be at least 6 hours for unshielded cables. Cables with an overall shield shall not
be immersed in water, and shall be tested dry.
e. For unshielded cables, an alternating potential, as specified in table XVII, shall be applied between two
terminals. One terminal shall be used to test each conductor in turn, and the other shall be for all remaining
conductors. Any uninsulated ground drain wires, if present, shall be tied together in electrical contact with the
water.
f. For shielded cables, an alternating potential, as specified in table XVII, shall be applied between two terminals.
One shall be used to test each conductor in turn, and the other shall be for all the remaining conductors. Any
ground wires, if present, and the shield shall be tied together. The test voltage shall be maintained for 60
seconds +5, - 0 from the time it is reached.
4.7.3.1 Alternate voltage withstand. The following alternate procedure may be used when tested as specified in
4.7.3. Specimens are to be tested dry.
a. Arrange the conductors in a rectangle containing rows and columns; for example, a 20-conductor cable would
have five columns and four rows. A 33-conductor cable would have five columns and seven rows, with two
unused spaces.
b. Connect all the conductors in columns together. Do this for each column.
c. Apply the specified test voltage, for the specified time, between each column of the rectangle in turn, and the
remaining columns connected together.
d. Disconnect all the conductors in a column. Do this for each column.
e. Connect all conductors in a row together. Do this for each row.
f. Apply the specified test voltage for 60 seconds +5, - 0, between each row the rectangle in turn, and the
remaining rows connected together.
g. Connect all the conductors together.
h. If shields are present, apply the specified voltage from table XVII between all the conductors connected
together and the shields connected together.
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