What's Wrong Here?
Jan 1, 2004 12:00 PM, By Joe Tedesco, NEC Columnist
Hint: Go ahead, add another extension ring just to be sure the finished installation will be flush with the wall.
David Marcotte, senior electrical designer, Bergmann Associates, Rochester, N.Y., questions the circuit's equipment grounding conductor. “Make sure it stays in the box (250.148),” Marcotte wrote. “I would bet the electrician, or wannabe electrician, was doing this work around the holiday season and was in need of practice for his holiday wrapping. And how about the teledata box in the background? Looks mighty inaccessible to me. Good luck installing a plate on that box.”
Ben Mickler, owner, Benchmark Electric, Inc., Zebulon, N.C., added, “Be sure to check Section 314.20. A box located in a wall with a surface of noncombustible material must be flush or recessed no more than 0.25 inch.”
John Penn Jr., P.E., associate, Steinle Construction Engineers, Inc., Wilmington, Del., would verify compliance with 250.4(A)(3). “Make sure that the grounding conductor is not wrapped around a non-current-carrying conductive material connected to thermoplastic conduits,” he wrote. “This would create a non-effective ground-fault current path.”
Author's note: All winners also noted that the number of extension rings installed isn't a problem as long as the conductors in the box can be extended at least 3 inches outside the opening (300.14).
Want to use this article? Click here for options!
© 2012 Penton Media, Inc.
Code Challenge
Code Quiz
Feb 2, 2012 9:02 PM, By Steven Owen
When installing audio distribution cables exposed on the surface of ceilings and sidewalls, the cables shall be supported by which of the following products?
- ...
More Code Quizzes
Code Q&A
Feb 2, 2012 8:58 PM, By Mike Holt
Q. Is it acceptable to use a 14 AWG conductor for the bonding jumper to a receptacle on a 20A branch circuit?
...
More Code Q&As
Acceptable Use Policy blog comments powered by Disqus
advertisement
product spotlight
Labeling tool
Feb 10, 2012 7:58 AM
The Rhino 4200 labeling tool features one-touch “hot keys” that quickly create and format wire/cable wraps, flags, fixed-length labels and more...
View all 2012 Product Spotlights
Free Product Info
Our Product Information site is the ultimate online resource for products and services offered by Advertisers featured in our Magazine. This service is provided as a quick and easy way to request Product Information online. Get FREE product information now.



































