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ANSI C78.390

2006 Edition, July 25, 2006

Complete Document

Electric Lamps — Method of Designation for Electric Lamps — Miniature and Sealed-Beam Incandescent Lamps

Includes all amendments and changes through Reaffirmation Notice , 2015

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Description / Abstract:

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.


The purpose of the designation system defined by this standard is to provide a nationally applicable and convenient lamp identification that may be used for both manufacturing and ordering purposes. The designation will ensure, for the user, the interchangeability of lamps that bear the same designation. 

The lamp characteristics data given by a manufacturer on a Miniature and Sealed-Beam Designation Request Form (Request Form) forms the basis for the assignment of a designation. They have not been approved by the American Standards Institute (ANSI) and do not constitute an American National Standard. Similarly, any consolidated listing of assigned designations with associated characteristics does not constitute an American National Standard.
ANSI/NEMA MW 1000, 2014