ANSI C29.2-1992 (1999) PDF

Full title and description

American National Standard for Insulators — Wet‑Process Porcelain and Toughened Glass — Suspension Type (ANSI C29.2‑1992; reaffirmed 1999). Defines materials, dimensions, mechanical and electrical characteristics, tests, marking, sampling and inspection requirements for suspension‑type ceramic and toughened‑glass insulators used on overhead transmission and distribution lines.

Abstract

This standard describes requirements for suspension‑type insulators produced from wet‑process porcelain or toughened glass including dimensional classes, mechanical ratings (routine, proof and specified mechanical load), electrical performance (power‑frequency and impulse flashover and withstand), radio‑influence voltage limits, marking, sampling, inspection and packaging. It was approved May 8, 1992 and later reaffirmed in 1999.

General information

• Status: Reaffirmed 1999 (1992 edition); subsequently revised and redesignated in later NEMA/ANSI publications (see related standards).
• Publication date: Approved May 8, 1992 (edition year 1992; reaffirmed 1999).
• Publisher: Developed by the relevant C‑29 committee (industry secretariat NEMA) and published/approved as an American National Standard by ANSI.
• ICS / categories: Insulators — ICS 29.080.10 (insulators).
• Edition / version: ANSI C29.2‑1992 (R1999 — reaffirmation).
• Number of pages: Typical published 1992 edition length reported ~25 pages (publisher formats may vary).

Scope

Specifies requirements for suspension‑type insulators of wet‑process porcelain and toughened glass used in transmission and distribution of electrical energy — covering customary shell diameters, materials, dimensions, rated mechanical loads and electrical performance for normal service, test procedures and acceptance criteria. The scope is limited to ceramic/glass suspension types (distribution and transmission sizes) as defined in the standard.

Key topics and requirements

• Materials and construction: wet‑process porcelain and toughened glass composition and finishes (glazing, enamel classes).
• Dimensions and classification by shell diameter and electrical class (distribution vs transmission sizes).
• Mechanical requirements: specified mechanical load (SML), routine and proof tests, impact resistance and sustained load testing.
• Electrical requirements: dry and wet power‑frequency flashover, impulse flashover and withstand voltages, power‑frequency puncture criteria, radio‑influence voltage (RIV) limits.
• Sampling, inspection, marking, lot acceptance and packaging requirements for commercial supply and procurement.
• Referenced test methods and normative references (e.g., related C29 test standards and applicable IEEE/IEC test practices where noted).

These topic areas and test/acceptance items are drawn directly from the standard text and publisher summaries.

Typical use and users

Primary users are electric utilities, overhead‑line equipment manufacturers, procurement/specification engineers, test laboratories and standards committees. The standard is used to specify purchased insulators, to set acceptance testing and factory‑test criteria, and to guide design and quality control for suspension insulators.

Related standards

Key related documents include the broader C29 series (test methods and other insulator types) such as ANSI C29.1 (test methods), the later ANSI/NEMA C29.2‑2012 (a consolidated revision) and the C29.2A / C29.2B split (distribution and transmission parts, 2013 and later revisions). Other related documents include NEMA/C29 composite‑insulator standards and applicable IEEE/IEC test and insulation practice guidance.

Keywords

ANSI C29.2, suspension insulators, wet‑process porcelain, toughened glass, insulator tests, flashover, impulse withstand, specified mechanical load, radio‑influence voltage, NEMA C29.2.

FAQ

Q: What is this standard?

A: ANSI C29.2‑1992 (reaffirmed 1999) is the American National Standard that specifies requirements for suspension‑type insulators made of wet‑process porcelain or toughened glass used on overhead power lines.

Q: What does it cover?

A: It covers materials, dimensions/classification, mechanical and electrical performance, required routine and type tests, sampling and inspection, marking and packaging for suspension insulators. It sets acceptance criteria for manufacturers and buyers.

Q: Who typically uses it?

A: Utilities, insulator and line‑hardware manufacturers, procurement/specification engineers and independent test labs use the standard to specify, verify and accept suspension insulators for transmission and distribution systems.

Q: Is it current or superseded?

A: The 1992 edition was reaffirmed in 1999 but has since been revised and reorganized: ANSI/NEMA C29.2‑2012 was issued and later the content was split into NEMA C29.2A and C29.2B (2013) and subsequently updated in later years. Users specifying new equipment should reference the latest NEMA/ANSI C29.2A/B editions appropriate to distribution or transmission sizes.

Q: Is it part of a series?

A: Yes — it is part of the C29 family of standards covering electrical power insulators (test methods, post/suspension/composite types, etc.). Related test methods and product standards are published under the C29 series and NEMA C29 designations.

Q: What are the key keywords?

A: Suspension insulator, wet‑process porcelain, toughened glass, flashover, impulse withstand, specified mechanical load (SML), radio‑influence voltage (RIV), ANSI C29.2, NEMA C29.2.