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| NEMA G5 has high mechanical strength and excellent electrical properties under dry conditions. It has high arc and heat resistance and is self extinguishing. It is used in the electrical industry in switch board panels, arc barriers, circuit breakers, and as structural electrical parts. |
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An electrical/mechanical grade of glass cloth laminate impregnated and cured with melamine resin. |
Sheet sizes 36 x 72, 36 x 48, 48 x 48, 48 x 96, and 48 x 108 in thicknesses .031 in. to 4 in.; cut and fabricated per drawing . |
Gray |
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Density |
124 lbs/ft3 - .072 lbs/in3 |
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Maximum operating temperature |
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electrical |
not recommended at elevated temperatures |
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mechanical |
310° F (140° C) |
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Water absorption |
0.4% |
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Hardness (Rockwell M) |
115 |
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Compressive strength |
65,000 psi |
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Tensile strength |
40,000 psi |
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Flexural strength |
50,000 psi |
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Impact strength - Izod edgewise with grain |
10.0 ft-lb/in |
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Dielectric strength |
300 vpm |
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Dielectric constant (@ 106 cycles per second) |
6.3 |
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Volume resistivity |
6 x 107 megohm-cm |
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Arc resistance |
180 sec |
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Surface resistivity |
6 x 106 megohms |
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Parallel dielectric |
50 kv |
