Code Q&A

Share This Article

 (0)

Oct 12, 2007 6:14 PM, By Mike Holt

Q. When are insulated bushings required on raceway terminations?

A. Where raceways contain conductors 4 AWG and larger, the conductors must be protected from abrasion during and after installation by a fitting that provides a smooth, rounded insulating surface, such as an insulating bushing [300.4(F)]. For IMC and RMC, a metal or plastic bushing must be installed on conduit threads at terminations, regardless of conductor size, in accordance with 300.4(F), unless the design of the box, fitting, or enclosure is such as to afford equivalent protection [342.46 and 344.46].

Email Facebook Digg Twitter

Want to use this article? Click here for options!

© 2010 Penton Business Media, Inc.

browse e-newsletters

Archives | Subscribe

View Sample | Subscribe

View Sample | Subscribe

Archives | Subscribe

View Sample | Subscribe

Archives | Subscribe

View Sample | Subscribe