Published by the National Electrical Manufacturers Association (NEMA), American National Standard for Roadway and Area Lighting Equipment—Non-Locking (Button)–Type Photocontrols covers the electrical and mechanical interchangeability of nonlocking type photocontrols for mounting within a roadway or off-roadway luminaire. These controls are commonly called “button” photocontrols. This lighting industry Standard was updated to add ingress protection specifications, update labeling requirements, define environmental requirements, and define load test procedures.
It is available for $67 at the NEMA website.
