1. ANSI C 29.1. (1992). Electrical power insulators—test methods.
2. ANSI C 29.11. (1989). Composite suspension insulators for overhead transmission lines—tests.
3. ANSI C2. (1992). National electric safety code.
4. IEC 1109. (1992). Composite insulators for ac overhead lines with a nominal voltage greater than 1000 V: Definitions, test methods, and acceptance criteria.
5. IEC 60815. (1986). Guide for the selection of insulators in respect of polluted conditions.