ANSI C136.11 2011 Edition, January 1, 2011
Roadway and Area Lighting Equipment - Multiple Parallel Wired Sockets
Published By:National Electrical Manufacturers Association (NEMA)
This standard covers medium and mogul multiple sockets as used in luminaires designed and intended for use in lighting roadways and other areas open to general use by the public.
The purpose of this standard is to provide interchangeability of lamps, minimum safety standards for operating personnel, and minimum performance criteria.