Historical
NEMA ANSI C29.10:1989 (R2002)
Wet-Process Porcelain Insulators - Indoor Apparatus Type
Specifies the material, dimensions and performance requirements for indoor apparatus wet-process porcelain insulators. Includes requirements for testing thermal and mechanical strength, impulse and dew-withstand values, flashover value, porosity and, when galvanized hardware is used, coating thickness.
NEMA: National Electrical Manufacturers Association [nema]