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| NEMA XX is a good electrical insulator with fair mechanical strength. It can be used in dry or humid conditions for switchboard panels, relay and switch bases, breaker arms, and barriers. |
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An electrical grade of paper laminate impregnated and cured with phenolic resin. |
Sheet sizes 36 x 72, 36 x 48, 48 x 48, 48 x 96, and 48 x 108 in thicknesses .031 in. to 2 in.; cut and fabricated per drawing . |
Natural & Black |
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Density |
83 lbs/ft3 - .048 lbs/in3 |
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Maximum operating temperature |
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electrical |
284° F (140° C) |
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mechanical |
284° F (140° C) |
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Water absorption |
0.5% |
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Hardness (Rockwell M) |
100 |
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Compressive strength |
30,000 psi |
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Tensile strength |
13,500 psi |
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Flexural strength |
17,000 psi |
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Shear (flatwise) |
10,000 psi |
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Impact strength - Izod edgewise with grain |
0.55 ft-lb/in |
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Dielectric strength |
500 vpm |
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Dielectric constant (@ 106 cycles per second) |
4.6 |
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Volume resistivity |
4 x 105 |
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Arc resistance |
n/a |
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Parallel dielectric |
60kv |
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