NEMA ANSLG C78.390
NEMA ANSLG C78390 2006-JUL-25 Method of Desgnaton for Electrc Lamps - Mnature and Sealed Beam ncandescent Lamps
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This standard describes a system for the designation of miniature and sealed-beam lamps. A form is provided for the use of lamp manufacturers to request a designation assignment, alternative, or change.