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NEMA ANSI NEMA C136.24-2026

American National Standard for Roadway and Area Lighting Equipment—Non-Locking (Button)-Type Photocontrols
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ANSI C136.24 is a standard developed by the National Electrical Manufacturers Association (NEMA) specifically for non-locking (button) type photocontrols used in roadway and area lighting.

Unlike the more common "twist-lock" photocontrols (covered by ANSI C136.10), button photocontrols are typically smaller and intended for permanent or internal mounting within a luminaire or its housing.

Key Aspects of the Standard

  • Interchangeability: It defines the electrical and mechanical requirements to ensure that button-type photocontrols from different manufacturers are physically compatible and can be swapped without modifying the light fixture.
  • Physical Form Factor: It covers the dimensions and mounting requirements for the "button" style sensor, which usually requires a small hole in the fixture through which the light-sensing element protrudes.
  • Electrical Performance: The standard specifies operating voltages, load ratings, and performance criteria to ensure the controls can reliably turn lights on at dusk and off at dawn.
  • Application: It is primarily used for roadway and off-roadway luminaires (such as park lighting, parking lots, or wall packs) where a low-profile, non-removable control is preferred over a protruding twist-lock sensor.
SDO NEMA: National Electrical Manufacturers Association
Document Number C136.24
Publication Date March 9, 2026
Language en - English
Page Count
Revision Level
Supercedes
Committee
Publish Date Document Id Type View
March 9, 2026 ANSI NEMA C136.24-2026 Revision
Not Available ANSI C136.24-2020 Revision