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MIL-DTL-3432 Cables, \(Power And Special Purpose\) And Wire, Electrical \(300 And 600 Volts\)This specification covers single and multiple conductor cables with and without shields for use in 300 and 600 volts root mean square \(rms\) applications \(see 6.1\).

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MIL-DTL-3432J
APPENDIX B
B.2 PHYSICAL PROPERTY REQUIREMENTS
B.2.1 Insulating compound, type IS, medium low temperature styrene butadiene rubber (SBR).
Walls 6 to 20 mils thick Walls over 20 mils thick
Unaged:
Tensile strength, minimum psi
450
600
Elongation, minimum %
200
250
Set, maximum, inch
.500
.500
After 95 ± ½ hour oxygen bomb aging at 70°C:
Tensile strength, minimum % of original
75
75
Elongation, minimum % of original
65
65
Ozone resistance (after air oven conditioning and
168 ± 1 hour in ozone) at 100°F
no visible cracks
no visible cracks
Brittleness temperature, unaged, max, °C
-40
-40
After aging, max °C
-40
-40
B.2.2 Insulating compound, type IS-L, low temperature, heat resistant styrene butadiene rubber (SBR).
Walls 6 to 20 mils thick Walls over 20 mils thick
Unaged:
Tensile strength, minimum psi
450
600
Elongation, minimum %
200
250
Set, maximum, inch
.375
.375
After 168 ± 1 hour oxygen bomb aging at 80°C:
Tensile strength, minimum % of original
50
50
Elongation, minimum % of original
50
50
After 20 ± ½ hour air pressure aging at 127 ± 2°C:
Tensile strength, minimum % of original
50
50
Elongation, minimum % of original
50
50
Ozone resistance (after air oven conditioning and
168 ± 1 hour in ozone) at 100°F
no visible cracks
no visible cracks
Brittleness temperature, unaged, max. °C
-55
-55
After aging, max. °C
-55
-55
Torsional stiffness, maximum ration at -55°C
10°
10°
B.2.3 Insulating compound, type IR, low temperature, natural rubber.
Walls 6 to 20 mils thick Walls over 20 mils thick
Unaged:
Tensile strength, minimum psi
800
1200
Elongation, minimum %
300
400
Set, maximum, inch
.375
.125
After 95 ± ½ hour oxygen bomb aging at 70°C:
Tensile strength, minimum % of original
75
75
Elongation, minimum % of original
75
75
Ozone resistance (after air oven conditioning and
168 ± 1 hour in ozone) at 100°F
no visible cracks
no visible cracks
Brittleness temperature, unaged, max.°C
-55
-55
After aging, max.°C
-55
-55
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