NEMA C29.12
NEMA C2912 1997-JAN-01 nsulators Compostes - Suspenson Type
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This standard covers composite suspension insulators made of a fiberglass-reinforced resin rod core, polymer material weather-sheds, and metal end fittings intended for use on overhead transmission lines for electric power systems, 70 kV and above. Mechanical and electrical performance levels specified herein are requirements for new insulators.