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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.

should only be handled when wearing gloves. The test tube shall be maintained with the

prepared specimens in the upright position for three weeks at an ambient temperature of

21 ± 3ºC. After this conditioning period, the mirror shall be removed and inspected for any

signs of corrosion which appear as transparent glass. Results can be quantified by imaging the

entire mirror and determining the percentage of surface area which is transparent.

4.6.5

Crosslinked Verification

4.6.5.1

Finished Wire

One inch (25 mm) of insulation shall be removed from each end of a 24-inch (610-mm)

specimen of finished wire. Both ends of the specimen shall be connected together and the test

load specified in Table 4 shall be attached to the connected specimen ends. The specimen

loop shall then be suspended over a stainless steel mandrel with a sintered polytetrafluoro-

ethylene coating. The mandrel shall have the diameter specified in Table 4, and shall be of

sufficient rigidity so as not to flex under load. This specimen, so prepared on the mandrel,

shall be conditioned in an air-circulating oven at 300 ± 3°C for 1 hour. The velocity of air

past the specimen (measured at room temperature) shall not be less than 100 feet (30 m) per

minute. After conditioning, the oven shall be shut off, the door opened, and the specimen

allowed to cool in the oven for at least 1 hour. When cool, the specimen shall be freed from

tension, removed from the mandrel, and straightened. The specimen shall then be subjected to

the bend test (4.6.5.1.1) followed by the voltage withstand test (4.6.14).

4.6.5.1.1

Bend Test

At a temperature maintained between 20 and 25°C, one end of the wire specimen shall be

secured to the mandrel and the other end to a weight equal to one half the test load specified in

Table 4. The mandrel shall be rotated until the full length of the specimen is wrapped around

the mandrel and is under the specified tension with adjoining turns in contact. The mandrel

shall then be rotated in the reverse direction until the full length of the specimen which was

outside during the first wrapping is now next to the mandrel. This procedure shall be repeated

until two bends in each direction have been formed in the same section of the specimen. The

specimen shall then be examined for cracking of the insulation.

4.6.5.2

Finished Cable

Two inches (51 mm) of the jacket shall be removed from each end of a 15-inch (381-mm)

specimen of finished cable, and the shield, if any, shall be pushed back and formed into a

pigtail at each end of the specimen. One inch (25 mm) of insulation from each conductor shall

then be removed from each end of the specimen. The cable specimen shall then be loaded

with sufficient weight to hang straight, and shall be conditioned in an air-circulating oven at

300 ± 3°C for 1 hour. The velocity of air past the specimen (measured at room temperature)

shall not be less than 100 feet (30 m) per minute. After conditioning, the oven shall be shut

off, the door opened, and the specimen allowed to cool in the oven for at least 1 hour. When

cool, the cable specimen shall then be examined for cracking of the jacket. The voltage

withstand test (4.6.14) shall then be conducted on shielded and jacketed cable specimens only.