FeaturesO-Z/Gedney specification grade insulated bushings help protect insulated conductors from abrasion during pulling or due to mechanical vibrationThey also provide a voltage gradient between the live conductors and ground at the point where conductor insulation is subjected to electrical and mechanical stressMolded on high impact phenolic thermosetting insulationPositive metallic conduit stopType B insulated bushings of malleable iron or steel, with conduit end stop and integrally molded noncombustible phenolic insulated surfaces rated 150 deg C shall be used on the ends of all raceways containing number 4 or larger conductors