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ANSI C78.20-2022

Electric Lamps - A, G, PS, and Similar Shapes with E26 Medium Screw Bases

Sets forth physical and electrical characteristics of the group of incandescent lamps that have A, G, PS, and similar bulb shapes with E26 single and double contact medium screw bases including the reduced wattage versions. Only clear, inside frost, frost-equivalent, and white bulb finishes are acknowledged. Excluded from this standard are tungsten-halogen and projection lamps.

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NEMA: National Electrical Manufacturers Association [nema]

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