Prior to 2023, Sec. 300.4(G) did not prohibit a plastic insulating bushing from being installed after the conductors were installed. But Sec. 300.4(G) was revised for ...
• Wall thickness does not directly correlate to a bushing’s strength. • Thinner bushings better dissipate heat, which is a leading cause of accelerated wear. Sometimes, thicker is better — heavy wool ...
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