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Electrical standards for insulators
IEC standards
=   International Electrotechnical Commission
ANSI standards C29.
=   American National Standards Institute
NEMA & IEEE standards
=   National Electrical Manufacturers Association -- Institute of Electrical and Electronics Engineers
European Standard (Europäische Norm)
=   issued by CENELEC European Committee for Electrical Standardization

Research of standards by type of insulators
 Porcelain and toughened glass Insulators for overhead lines   Spool
Strain
Pin insulators
Suspension and dead-ends
Line post
Direct current
 
 

 

 		Insulators for substations   Station Post
Hollow
 
 

 

 		Tests, leakage (creepage) distance, materials   Test methods
Leakage distance (USA) = creepage distance(GB)
Materials
Direct current
 
  Epoxy     Insulated bushings
Post insulators
 
 Composite (= Polymer)     Line post
Suspension and dead-ends
Hollow
Tests for composite insulators for overhead lines
Railway applications (Bahnanwendungen)
Free downloads of following NEMA & ANSI standards can be obtained in Acrobat .pdf format at NEMA. Just type insulators in the search prompt. Hard copies of these ANSI standards can be purchased at the same site.

IEC standards may be purchased through your country's member of this organization.

Print a list of insulator standards.

Questions/answers listed by key words, about the design of insulators.

Vocabulary and other issues
dot electrodesignIEC is setting 5 figures for the standards. They all will start with a "6". For example, former IEC 168 becomes IEC 60168.
dot electrodesign"Cap & pin" is for ANSI a pedestal post insulator. For IEC, "cap & pin" is a suspension insulator
dot electrodesign"Ceramic" includes both porcelain and glass for ANSI. For IEC ceramic is porcelain, never glass
dot electrodesign"Creepage distance" as used by IEC is synonymous of ANSI's "leakage distance".
dot electrodesignIEC's "design tests" are ANSI's "prototype tests", but
dot electrodesignANSI's "design tests" are IEC's "type tests". Confusing, isn't? Fortunately routine and sample tests have same meanings for both standards.
There are probably other difficulties. Send me an E-mail