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55PC6273-12-9-9CS3199

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
Page 10 of 18 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.
SPECIFICATION 55PC, ISSUE 8 Page 11 of 18
NOTE: ANY PRINTED COPY OF THIS DOCUMENT
IS AN UNCONTROLLED COPY.
© 2008-2015 Tyco Electronics Corporation. All rights reserved.
TABLE 4. MANDRELS AND TEST LOADS FOR FINISHED WIRE
CROSSLINKED VERIFICATION
AWG
55PC011X 55PC021X, 55PC081X 55PC071X
Mandrel OD
(± 3%)
Test Load
(± 3%)
Mandrel OD
(± 3%)
Test Load
(± 3%)
Mandrel OD
(± 3%)
Test Load
(± 3%)
inch (mm) lbs (kg) inch (mm) lbs (kg) inch (mm) lbs (kg)
30 0.25 (6.4) 0.25 (0.11)
28 0.25 (6.4) 0.25 (0.11)
26 0.38 (9.7) 0.25 (0.11) 0.38 (9.7) 1.0 (0.45)
24 0.38 (9.7) 0.50 (0.23) 0.50 (13) 1.5 (0.68) 1.00 (25) 4.0 (1.8)
22 0.50 (13) 0.75 (0.34) 0.50 (13) 2.0 (0.91) 1.00 (25) 4.0 (1.8)
20 0.50 (13) 1.0 (0.45) 0.50 (13) 3.0 (1.4) 1.00 (25) 6.0 (2.7)
18 0.50 (13) 1.0 (0.45) 0.75 (19) 4.0 (1.8) 1.00 (25) 6.0 (2.7)
16 0.75 (19) 1.5 (0.68) 1.00 (25) 4.0 (1.8) 1.25 (32) 7.0 (3.2)
14 1.00 (25) 2.0 (0.91) 1.00 (25) 6.0 (2.7) 1.25 (32) 7.0 (3.2)
12 1.50 (38) 3.0 (1.4) 1.50 (38) 6.0 (2.7) 2.00 (51) 8.0 (3.6)
10 2.00 (51) 3.0 (1.4) 2.00 (51) 6.0 (2.7) 2.00 (51) 8.0 (3.6)
8 3.00 (76) 4.0 (1.8) 3.00 (76) 8.0 (3.6)
6 4.00 (102) 4.0 (1.8) 4.00 (102) 8.0 (3.6)
4 5.00 (127) 8.0 (3.6)
2 6.00 (152) 12.0 (5.4)
1 8.00 (203) 12.0 (5.4)
0 8.00 (203) 12.0 (5.4)
00 10.0 (254) 16.0 (7.3)
000 10.0 (254) 16.0 (7.3)
0000 10.0 (254) 16.0 (7.3)
4.6.6 Examination of Product
Where requirements are not supported by specific test procedures, products shall be examined
to determine conformance to this specification and the applicable SCD.
4.6.7 Flammability
4.6.7.1 Test Apparatus
The test shall be performed within a test chamber approximately 1 foot (0.30 m) square by
2 feet (0.61 m) in height, open at the top and front to provide adequate ventilation for
combustion but to prevent drafts. The specimen holder shall be so designed that the lower end
of a 24-inch (610-mm) specimen is held by a clamp, while the upper end of the specimen
passes over a pulley and can be suitably weighted to hold the specimen taut at an angle of
60 degrees with the horizontal, in a plane parallel to and approximately 6 inches (152 mm)
from the back of the chamber. The test flame shall originate from a Bunsen type gas burner
with a 0.250-inch (6.4-mm) inlet, a needle valve in the base for gas adjustment, a nominal bore
of 0.375 inch (9.5 mm), and a barrel length of approximately 4 inches (102 mm) above
Page 12 of 18 SPECIFICATION 55PC, ISSUE 8
NOTE: ANY PRINTED COPY OF THIS DOCUMENT
IS AN UNCONTROLLED COPY.
© 2008-2015 Tyco Electronics Corporation. All rights reserved.
the air inlets. The burner shall be adjusted to furnish a 3-inch (76-mm) high conical flame
with an inner cone approximately 1 inch (25 mm) in length and a flame temperature not less
than 954°C at its hottest point, as measured with an accurate thermocouple pyrometer. A sheet
of facial tissue conforming to UU-T-450 shall be suspended taut and horizontal 9.5 inches
(241 mm) below the point of application of the flame to the specimen and at least 0.50 inch (13
mm) from the chamber floor, so that any material dripping from the specimen shall fall upon
the tissue.
4.6.7.2 Test Procedure
A 24-inch (610-mm) specimen shall be marked at a distance of 8 inches (203 mm) from its
lower end to indicate the point for flame application and shall be placed in the specified 60-
degree position in the test chamber. The lower end of the specimen shall be clamped in
position in the specimen holder and the upper end shall be passed over the pulley of the holder
and the applicable weight shall be attached. For wire, the weight shall be equal to one half the
test load specified for the crosslinked verification test of the same wire in Table 4. For cable,
the weight shall be sufficient to hold the specimen taut throughout the test. With the burner
held perpendicular to the specimen and at an angle of 30 degrees from the vertical plane of the
specimen (see Figure 1), the hottest portion of the flame shall be applied to the lower side of
the specimen at the test mark. The period of test flame application shall be 30 seconds and the
test flame shall be withdrawn immediately at the end of that period. The distance of flame
travel upward along the specimen from the test mark and the time of burning after removal of
the test flame shall be recorded; also the presence or absence of flame in the facial tissue due
to incendiary dripping from the specimen. Charred holes or charred spots in the tissue shall be
ignored in the absence of actual flame. Breaking of the wire specimens in size 24 or smaller
shall not be considered as failure, provided the requirements for flame travel limits, duration
of flame, and absence of incendiary dripping are met.
FIGURE 1. FLAMMABILITY TEST APPARATUS
(shown without chamber)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

55PC6273-12-9-9CS3199

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