How well do you know the Code? Think you can spot violations the original installer either ignored or couldn't identify? Here's your chance to moonlight as an electrical inspector and second-guess someone else's work from the safety of your living room or office. It's your turn to identify the violation.
Hint: Keep your feet on the ground
Find the Answer
The CATV installer, who installed the upper enclosure on this wall for his equipment and cables, apparently was not aware of the grounding and bonding requirements of Sec. 820.100 of the 2011 NEC.
There are several options when it comes to grounding and bonding the shield of the coaxial cable. None of those options include relying on a ground lug connected to an NM cable connector, as was done in this installation.
According to 820.100(B)(1), if the building has an intersystem bonding termination installed in compliance with 250.94, the coaxial cable bonding conductor must be connected to it. If there is no intersystem bonding termination installed, 820.100(B)(2) specifies seven other possible grounding and bonding options — including bonding the coaxial cable shield to the grounding electrode system, the grounded metal water piping, an accessible means external to grounded service enclosures, nonflexible service raceways, the service equipment enclosure, or the GEC or GEC metal enclosure for the power service or structure disconnecting means. Section 820.100(B)(2) also states, "A bonding device shall be mounted on non-removable parts." Lastly, the NM cable connector was certainly not designed to be installed and used in this manner, which creates a violation of 110.3(B).