Bl.— This standard establishes test methods relating to molded, non-ceramic insulating materials. Rubber and casein-based products are also excluded. It also determines the way to express the results of the tests without taking into account the required values for each type of material. B2.—? The tests considered are applied only to finished pieces and not to molded specimens for testing, since their purpose is to control the quality of the molded insulating material and not the quality of the raw material used. B3.— This standard is limited to molded parts of apparatus and devices used in common electrical installations whose voltage does not exceed 250 V. Materials used in devices for: Environments whose temperature exceeds 50° C Corrosive environments Installation at weather Moisture and drip proof.
UNIT 122-1957 history
1957UNIT 122-1957 Test methods for non-ceramic insulating materials