ANSI C78.1401:2004:2016 Edition
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American National Standard for Electric Lamps – Dimensions for Projection Lamps–Double-Contact, Medium Ring (Special B), Base-up Type
Published By | Publication Date | Number of Pages |
NEMA | 2016-01-06 | 8 |
ANSI C78.1401-2004 establishes the dimensions essential to the interchangeability of lamps of the double-contact, medium ring (Special B), base-up type. It is not intended to prescribe either operating characteristics or details of design, such as the shape of the ventilation ports or the method of attachment of the prefocus ring to the base.