General Purpose Grade:
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Good punching properties that satisfy Nema GPO-1 and IEEE temperature class 130*C. Used for transformers, spacers and supports.
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| GPO-1:
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A Nema GPO-1 grade with an IEEE rating of 155*C. This grade has a high resistance to cold flow or creep under heat and pressure. Applications include slot wedges for motors, washers, brush plates and terminal boards.
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| GPO-2:
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A UL approved grade with a rating of 94V-0 (flammability) and an IEEE temperature rating of 130*C. Its applications for sole support of current carrying parts include insulators for switch gear, appliance and TV components (low-voltage).
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| GPO-3:
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Same as GPO-2 except under high-voltage applications as well as a UL recognized arc resistance of 180 seconds.
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