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ANSI C81.64-2005 (S2020)
Guidelines and General Information for Electric Lamp Bases, Lampholders, and Gauges
Gives guidance and information to designers and testing personnel on the use of ANSI_IEC C81.61, ANSI_IEC C81.62 and ANSI_IEC C81.63 and their supplements.
NEMA: National Electrical Manufacturers Association [nema]