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ANSI C78.22-1995 (S2018)
Incandescent Lamps - A, G, PS, and Similar Shapes with E39 Mogul Screw Bases
Sets forth the physical and electrical characteristics of the group of incandescent lamps that have A, G, PS and similar bulb shapes with E39 mogul screw bases.
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NEMA: National Electrical Manufacturers Association [nema]