The National Electrical Manufacturers Association (NEMA) published ANSI/NEMA C29.2A-2013
Wet Process Porcelain and Toughened Glass—Distribution Suspension Type
and ANSI/NEMA C29.2B-2013
Wet Process Porcelain and Toughened Glass—Transmission Suspension Type.
ANSI/NEMA C29.2A covers distribution suspension-type insulators 4.25 inches (108 millimeters) to 8 inches (203 millimeters) in diameter, made of wet-process porcelain or of toughened glass, and used in the distribution of electrical energy.
C29.2A may be purchased in electronic or hardcopy format for $45.
ANSI/NEMA C29.2 B covers transmission suspension-type insulators 9 inches (228.6 millimeters) in diameter and larger, made of wet-process porcelain or of toughened glass, and used in the transmission of electrical energy.
may be purchased in electronic or hardcopy format for $59.
Contents and scope of each standard may be viewed on the
Electrical Manufacturers Association (NEMA) represents nearly 350 electrical
equipment and medical imaging manufacturers that make safe, reliable, and efficient products
and systems. Our combined industries
account for 360,000 American jobs in more than 7,000 facilities covering every
state. Our industry produces $106 billion shipments of electrical equipment and
medical imaging technologies per year with $36 billion exports.