ANSI NEMA C78.1501-2016 pdf free download.Electric Lamps — Tungsten-Halogen Lamps with G22 Bases and 63.5 mm LCL
1 Scope
This standard defines the dimensional limits and other physical characteristics required to ensure interchangeability and assist in the proper application of a specific category of lamps. This category is tungsten-halogen lamps with G22 bases and 63.5 mm (2½ in.) nominal light center length. Lamps of various design voltages are included. Lamps with the specifications listed in this standard are intended for stage and studio applications. The grouping of lamps in this standard is based on general physical characteristics. It does not imply that the lamps listed are interchangeable with each other in a particular application. Other tungsten-halogen lamps for stage and studio applications are described in standards listed in Annex B. Certain lamps in this standard are compatible with IEC 60357.
2 Normative References
The following standards contain provisions that, through reference in this text, constitute provisions of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
ANSI C78.370-1 997 (R201 1 ) American National Standard for Method of Designation for Electric
Lamps—Photographic, Stage and Studio
ANSI/IEC C78.682-1 997 (R201 6) American National Standard for Electric Lamps—Standard Method
of Measuring the Pinch Temperature of Quartz Tungsten-Halogen
Lamps ANSI C78.1 450-1 983 (R201 1 ) American National Standard for Electric Lamps, Incandescent
Projection Lamps—Method for Life Testing
ANSI C78.79-201 4 American National Standard for Electric Lamps—Nomenclature for
Envelope Shapes Intended for Use with Electric Lamps
ANSI C81 .61 -201 7 American National Standard for Electrical Lamp Bases—
Specifications for Bases (Caps) for Electric Lamps
ANSI C81 .63-2007 (R201 4) American National Standard for Gauges for Electric Lamp Bases and
Lampholders
3 Lamp Designations
3.1 Marking
Lamps shall be marked with the relevant code in accordance with the photo lamp designation system,ANSI C78.370.
3.2 Durability
The area of the marking of an unused lamp shall withstand, maintaining legibility, the application of a
rubbing test. This test involves rubbing by hand with a smooth cloth, dampened with water, for a period of 1 5 seconds.
4 Physical Characteristics
4.1 Bulb Designations
Bulb designations are defined in ANSI C79.1 .
In this standard, bulbs are described by metric designations, with customary designations in parentheses.
4.2 Base Specification
Finished lamps employing the G22 base shall comply with the detailed base requirements given in ANSI C81 .61 . Base gauging procedures are given in ANSI C81 .63.
4.3 Lamp Characteristics
Physical, electrical, and other characteristics of standard lamps are shown in Table 1 , with tolerances as appropriate.
4.4 Dimensions
4.4.1 The lamp space drawing (Figure 1 ) shows the maximum limits of the space that may be occupied by any part of a bulb. The space shown will accommodate the longest and shortest lamps with maximum bulb diameters, and maximum bulb excursion with respect to the base axis. A typical bulb is shown as a dashed line within the maximum space. The following general conditions apply to the construction of these drawings:
a. Straight lines are used as much as possible to simplify the outline; all compromises with the
actual space are in excess of the actual space required.
b. All excursions of a lamp bulb are shown relative to a fixed-position base.
c. Bulb “eccentricity” with respect to the base axis is a combination of allowances for angular tilt and
lateral displacement.
d. The base shown in the drawing represents a typical form. The essential dimensions are
controlled by the “Go” gauge for G22-based lamps described in ANSI C81 .63.
e. All dimensions are in millimeters (mm) unless otherwise specified.
