I know, not the "right" group - but please help if you can! :)
I really thought I had seen it all... I've discovered we have a installation crew that is using BX "Greenfield" ( flexible metal conduit) as a protective sleeve around everything from 120/208 VAC devices on a branch circuit, to coax, and even fiber optic.
BUT - not "box-to-box" with fittings like a normal person would do.
Instead, they cut the BX Flex and then there's a sharp edge. So, they take multiple wraps of electrical tape to "build-up" the power cord diameter so the cord doesn't get cut or damaged.
In other words, picture an appliance that is "cord and plug" connected. (i .e., It is not hardwired into a box - it has a cord and plug.) Now, "prote ct" this cord with BX Flex (FMC) but don't put fittings on either end. Ins tead, use a boatload of electrical tape and other crap to try to protect th e cord from the sharp edge of the BX. (Normally, the BX would go into a sp ecial fitting, and then attach to a box. The fitting prevents the BX from coming into contact with the conductor / jacket.)
QUESTION: Exactly how does this violate NEC? I'm sure this approach is total bullshit (and not even remotely safe!), but I can't find the silver bullet clause where I can go to the person respons ible for this horseshit and get it to stop.
If I can't find the NEC clause that prohibits this, I'm just going to try t o kill it under 400.8(1) that flexible cord is no substitute for permanent wiring and just ignore the armor part altogether - which is really the only reason they are using the Flex in the first place.
Still -- this practice is so idiotic, it has to be explicitly prohibited. Right?
Thanks in advance, as always.