SPECIFICATION RT-1112 REVISION 5 Page 5
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4.3.2.2 Current Leakage
Test three specimens each with SXL wire and GPT wire.
Immerse the center section of all specimens in a 23 ± 3ºC (73 ± 5ºF) water bath containing 5 percent
sodium chloride by weight. The ends of the specimens should be a minimum of 50.8 mm (2 inches) above
the water line.
Measure the leakage current between the conductors in the specimens and the water bath after 24 hours of
immersion. The applied voltage for the measurement shall be 50 volts dc. After environmental exposure
(sections 4.3.2.3 through 4.3.2.7) the immersion period shall be 4 hours.
4.3.2.3 Flex Test
While at room temperature, wrap 3 specimens made with SXL wire and 3 specimens made with GPT wire
around 50.8 mm (2 inch) mandrels, using the following procedure. Attach one end of the specimen to the
mandrel and the other end to a weight (see Table 2). Rotate the mandrel sufficiently to cause the splice area
to wrap around the mandrel, and the wires on the opposite side of the splice to contact the mandrel. Rotate
the mandrel in the opposite direction until the splice is again wrapped around the mandrel. This shall be one
cycle. Test each sample for five cycles. Measure the current leakage in accordance with section 4.3.2.2.
4.3.2.4 Thermal Shock
Suspend vertically 3 specimens made with SXL wire in a circulating air oven for 30 minutes at 130 ± 5ºC
(266 ± 9ºF) and 3 specimens made with GPT wire for 30 minutes at 105 ± 5ºC (221 ± 9ºF). Remove the
specimens from the oven and within 2 minutes immerse them in a 5 percent sodium chloride solution by
weight at 5 ± 5ºC (41 ± 9ºF). Remove them from the bath within 30 minutes. This shall be one cycle. Test
the samples for 5 cycles and measure the current leakage in accordance with section 4.3.2.2.
4.3.2.5 Low Temperature Flexibility
4.3.2.5.1 SXL Wire
Condition 3 specimens in a cold chamber for 4 hours at -30 ± 3°C (-22 ± 5ºF). While at this temperature,
wrap the specimens around a 10 cm (4 inch) mandrel. Attach one end of the specimen to the mandrel and
the other end to a weight (see Table 2). Rotate the mandrel sufficiently to cause the splice area to wrap
around the mandrel, and the wires on the opposite side of the splice to contact the mandrel. Then rotate the
mandrel in the opposite direction until the splice is again wrapped around the mandrel. This shall be one
cycle. Test each specimen for five cycles. Upon completion of the fifth cycle, test the specimens for
dielectric withstand.
Dielectric Withstand
Immerse the center section of all specimens in a 23 ± 3ºC (73 ± 5ºF) water bath containing 5 percent sodium
chloride by weight. The ends of the specimens should be a minimum of 50.8 mm (2 inches) above the water
line. The specimens shall remain immersed in the bath for two hours prior to testing. Raise the voltage on
the immersed specimens to 1,000 volts ac and hold for 1 minute, then inspect for insulation rupture.