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SPECIFICATION 55PC, ISSUE 8

NOTE:

ANY PRINTED COPY OF THIS DOCUMENT

IS AN UNCONTROLLED COPY.

© 2008-2015 Tyco Electronics Corporation. All rights reserved.

4.6.10

Insulation or Jacket Flaws

4.6.10.1

Impulse Dielectric Test

Finished wire and cable shall be tested in accordance with ASTM D 3032, Section 13, at the

voltage specified in the applicable SCD with the conductor or shield, as applicable, grounded

at one end or both ends. When specified in the contract or order, insulation or jacket failure,

untested portions, or portions which have been exposed to fewer or more than the specified

pulses may be marked by stripping the insulation or jacket or by any other suitable method of

marking as specified in the contract in lieu of being cut out of the wire or cable.

4.6.10.2

Spark Test

Finished wire and cable shall be passed through a chain electrode spark test device using the

voltage specified in the applicable SCD at a frequency of 60 or 3000 Hz. The conductor or

shield, as applicable, shall be grounded at one or both ends. The electrode shall be of a

suitable bead chain or fine mesh construction that will give intimate metallic contact with

practically all of the wire or cable surface. Electrode length and speed of specimen movement

shall be such that the wire or cable is subjected to the test voltage for a minimum of 0.2

second. Any portion showing breakdown shall be cut out, including at least 2 inches (51 mm)

of insulation or jacket on each side of the failure.

4.6.11

Insulation Resistance

The uninsulated ends of a wire specimen at least 26 feet (7.9 m) in length shall be connected

electrically to a DC terminal. The specimen shall be immersed to within 6 inches (152 mm) of

its ends in a water bath at 25 ± 5°C containing 0.5 to 1.0 percent of an anionic wetting agent.

After 4 hours minimum of immersion, the specimen shall be subjected to a potential of 250 to

500 volts applied between the conductor and the water bath, which serves as the second

electrode. The insulation resistance of the specimen shall be determined after one minute of

electrification at this potential and shall be calculated as follows:

Megohms for 1000 feet =

(or M

Specimen resistance (megohms) x Immersed length (feet) (or meters)

1000

4.6.12

Low Temperature-Cold Bend

For finished wire, a specimen shall be tested in accordance with the insulation low temperature

resistance test specified in AS22759 at -65 ± 2°C for 4 hours using the applicable mandrel and

test load specified below, except that only 1 specimen shall be tested and the voltage withstand

test shall be as specified herein (4.6.14). Finished cable shall be tested in accordance WC

27500 at -65 ± 2°C for 4 hours using the applicable mandrel and test load specified below,

except the voltage withstand test shall be as specified herein (4.6.14). Dissecting the cable

specimen and testing the individual wires shall not be required.

Wire:

0.75-inch (19-mm) mandrel, 3-lb. (1.4 kg) test load

Cable:

1.50-inch (38-mm) mandrel, 5-lb. (2.3 kg) test load