What is in this article?:
- What's Wrong Here?
- Find the Answer
NEC expert Joe Tedesco takes photos of National Electrical Code violations and invites readers to identify the violations in his What's Wrong Here? column in EC&M magazine.
Find the Answer
The following individuals correctly identified the Code violations shown in the March column: Robert Tashijan, vice president, T-Squared Associates, Mishawaka, Ind.; Gary Click, technical director, VAE Nortrak North America, Inc., Birmingham, Ala.; Jim Friesen, general foreman, Prime Electric Co., Bellevue, Wash.
This installation violated several Sections of the Code, and each winner noted them all. Locknuts weren't installed onto threads, which could allow the fittings to pull out and expose the conductor insulations to the sharp edges of the chopped up enclosure cabinet (300.10). Insulating bushings aren't provided on the ends of the fittings to protect the conductor insulation from abrasion and damage [300.4(F)]. Cardboard inserted into the bore of the threaded fittings isn't listed for service in this application (110.8).
What appears to be data or communications cables are running too close to electric power conductors. The holes for the threaded fittings appear to have been cut using a “nibbler” from the edge of the panel insert, leaving an unclosed groove larger than .125 in. that doesn't appear to be closed.