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clamps
wear from
plate
FIGURE 6. GROUP I TESTING: PTFE (WIRE CODE 6) WIRE DAMAGE AFTER 500
HOURS OF VIBRATION CONDITIONING
0
1
2
3
1 2 3 4 5 6 7 9 10 11
with Wire Code
Severity of Damage (0 - 3)
Wear to wire
Wear from
clamps
wear from
plate
FIGURE 7. GROUP I TESTING: PTFE, MINERAL-FILLED (WIRE CODE 7) WIRE
DAMAGE AFTER 500 HOURS OF VIBRATION CONDITIONING
14
0
1
2
3
1 2 3 4 5 6 7 9 10 11
with Wire Code
Severity of Damage (0 - 3)
Wear to wire
Wear from
clamps
wear from
plate
FIGURE 8. GROUP I TESTING: PTFE/GLASS BRAID (WIRE CODE 9) WIRE DAMAGE
AFTER 500 HOURS OF VIBRATION CONDITIONING
0
1
2
3
1 2 3 4 5 6 7 9 10 11
with Wire Code
Severity of Damage (0 - 3)
Wear to wire
Wear from
clamps
wear from
plate
FIGURE 9. GROUP I TESTING: PI/PTFE (WIRE CODE 10) WIRE DAMAGE AFTER 500
HOURS OF VIBRATION CONDITIONING
15
0
1
2
3
1 2 3 4 5 6 7 9 10 11
with Wire Code
Severity of Damage (0 - 3)
Wear to
wire
Wear from
clamps
wear from
plate
FIGURE 10. GROUP I TESTING: PI/PTFE, ALLOY (WIRE CODE 11) WIRE DAMAGE
AFTER 500 HOURS OF VIBRATION CONDITIONING
Figure 1 indicates that negligible wire-to-wire wear occurs with PVC/glass/nylon wire, whether
in a mixed or nonmixed bundle.
Figure 2 indicates that PI wire consistently exhibits low wire-to-wire wear whether in a mixed or
nonmixed bundle.
Figure 3 indicates that XPI alloy wire exhibits moderate wire-to-wire wear in the nonmixed and
mixed bundles, except in combinations with PTFE/glass (code 9), PI/PTFE (code 10), and
PI/PTFE alloy (code 11), where a low amount of wear was observed.
Figure 4 indicates that XLETFE wire has negligible wire-to-wire wear in the nonmixed and
mixed bundles, except in combination with PVC/glass/nylon, where a low level of wear was
noted.
Figure 5 indicates that XLETFE alloy wire exhibits low wire-to-wire wear in the nonmixed
bundle and in combination with PVC/glass/nylon (code 1) and PI (code 2). Negligible wear was
observed when mixed with other wire types.
Figure 6 indicates that PTFE wire exhibits low wire-to-wire wear when mixed with XPI wire
(code 3), and negligible wear in all other combinations and in the nonmixed bundle.
Figure 7 indicates that mineral-filled PTFE wire exhibits negligible or very low wire-to-wire
wear in the nonmixed and mixed bundles.
Figure 8 indicates that negligible wire-to-wire wear was observed on PTFE/glass wire, whether
in mixed or nonmixed bundles.
16
Figure 9 indicates that PI/PTFE exhibits low wire-to-wire wear when mixed with PI wire
(code 2) only. This is likely caused by the PI insulation being more abrasive than the outer
PTFE layer of the PI/PTFE wire. In the nonmixed bundle, and in all other combinations,
negligible wear was observed.
Figure 10 indicates that there was negligible wire-to-wire wear of PI/PTFE alloy in the nonmixed
and mixed bundles. The slight difference in the results between the same insulation types in
figures 9 and 10 may be due to the subjectivity of the visual examinations.
Figure 11 provides a summary of five mixed wire bundle combinations in which one of the wires
exhibited more severe wire-to-wire wear than in the nonmixed bundle. The wire types exhibiting
more wear are XLETFE, PTFE, MF-PTFE, and PI/PTFE (codes 4, 6, 7, and 10, respectively).
However, in these combinations, the differences in wear were slight and could be attributed to
the subjectivity of the data. The following observations were made on these combinations:
• 1, 4 (PVC/glass/nylon, XLETFE): The XLETFE exhibited more damage when mixed in
a bundle with the glass fiber with nylon than in the nonmixed bundle.
• 3, 6 and 3, 7 (XPI, PTFE and XPI, MF-PTFE): The XPI caused a little more damage on
both of the PTFE insulated wire types in the mixed bundles, but the damage was slightly
less on the abrasion-resistant MF-PTFE. Neither of the PTFE wire types caused
additional damage to the XPI wire. The XPI had poor resistance to abrasion regardless of
the other wire type.
• 5, 7 (XLETFE alloy, MF-ETFE): The XLETFE alloy showed slightly less damage when
mixed with MF-PTFE than in its baseline bundle, but the MF-PTFE showed slightly
more damage in the mixed configuration.
• 2, 10 (PI, PI/PTFE): The PI/PTFE showed a little more damage in the mixed
configuration due to the PTFE outer coating being softer than the PI coating.
0
1
2
3
1,4 3,6 3,7 5,7 2,10
Combinations (wire codes) Severity of Damage (
　
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