Historical
NEMA ANSI C136.10:2006
For roadway and area lighting equipment - locking-type photocontrol devices and mating receptacles - physical and electrical interchangeability and testing
Covers the following roadway and area lighting equipment, which may be physically and electrically interchanged to operate within established values: locking-type photocontrol; locking-type mating receptacle; and shorting and non-shorting caps.
NEMA: National Electrical Manufacturers Association [nema]