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| NEMA G7 can be used in high temperature applications under humid conditions. It has excellent heat resistance and arc resistance, is self extinguishing, and is rated as class H insulation. It is used in the heating, appliance, and electrical industries; and anywhere a high strength electrical insulator is needed in high temperature applications. |
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An electrical grade of glass cloth laminate impregnated and cured with silicone 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 . |
White |
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Density |
118 lbs/ft3 - .068 lbs/in3 |
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Maximum operating temperature |
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electrical |
338° F (170° C) |
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mechanical |
428° F (220° C) |
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Water absorption |
0.03% |
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Hardness (Rockwell M) |
105 |
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Compressive strength |
41,000 psi |
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Tensile strength |
20,500 psi |
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Flexural strength |
25,000 psi |
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Impact strength - Izod edgewise with grain |
11.0 ft-lb/in. |
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Dielectric strength |
350 vpm |
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Dielectric constant (@106 cycles per second) |
4.2 |
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Volume resistivity |
n/a |
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Arc resistance |
240 sec |
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Surface resistivity |
n/a |
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Parallel dielectric |
60 kv |
