All ceramic line post insulators are solid core wet process porcelain and are manufactured and tested in conformance with ANSI Standard C29.7 and include four different "classes" of solid core line post insulators.

Ceramic line post insulators types:
Two basic horizontal line post insulator clamp-type designs: Gain base castings: ANSI 57-31, ANSI 57-32, ANSI 57-33, ANSI 57-34, ANSI 57-35, ANSI 57-36; Stud base castings: ANSI 57-21, ANSI 57-22, ANSI 57-23, ANSI 57-24, ANSI 57-25, ANSI 57-26
Two basic horizontal vertical line post stud-based designs: Conventional tie-top: ANSI 57-1, ANSI 57-2, ANSI 57-3, ANSI 57-4, ANSI 57-5, ANSI 57-6; Clamp top: ANSI 57-11, ANSI 57-12, ANSI 57-13, ANSI 57-14, ANSI 57-15, ANSI 57-16

Ceramic line post insulators applications:
Flat base for steel or concrete pole mounting can be mounted directly to pole or on pole gains. Stud mounted base is recommended for mounting on pole gains, brackets towers or structures. Directly mounted horizontal distribution insulators, because they provided relatively small horizontal displacement, were seldom used for this type of installation.

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