NEMA TC 12 1991 Edition, January 1, 1991 Corrugated Polyvinyl Chloride (PVC) Coilable Plastic Utilities Duct
NEMA PS 1 1991 Edition, January 1, 1991 Standard for Magnetic Tape
NEMA XR 16 91st Edition, January 1, 1991 Test Standard for the Determination of the System Contrast Ratio and the System Veiling Glare Index of an X-Ray Image Intensifier System
ANSI C78.1418 91st Edition, January 1, 1991 Electric Lamps - EYB Projection Lamp
ANSI C78.1419 91st Edition, January 1, 1991 Electric Lamps - EML Projection Lamp
NEMA EI 21.2 91st Edition, January 1, 1991 Instrument Transformers for Revenue Metering (125 kV BIL Through 350 kV BIL)
NEMA HP 100 SET 91st Edition, January 1, 1991 High Temperature Instrumentation and Control Cables
ANSI C78.1340 90th Edition, June 11, 1990 Electric Lamps - 450-Watt, 230-Volt, B75 Self-Ballasted Mercury Lamps
NEMA TC 8 1990 Edition, January 1, 1990 Extra-Strength PVC Plastic Utilities Duct for Underground Installation
ANSI C93.1 1990 Edition, January 1, 1990 Power-Line Carrier Coupling Capacitors and Coupling Capacitor Voltage Transformers (CCVT) - Requirements
ANSI C50.10 1990 Edition, January 1, 1990 Rotating Electrical Machinery - Synchronous Machines
ANSI C78.388 90th Edition, January 1, 1990 Electric Lamps - High-Pressure Sodium Lamps - Methods of Measuring Characteristics