Cubical feeds

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Mustang125

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Location
New Hampshire
Occupation
Master Electrician, Project Manager and Estimator
The cubical people typically supply us with a 3ft piece of LFMC with there special connector on one end that plugs into cube and 8 wires on other end(4 ungrounded conductors, 2 grounded conductors, 2 grounds). It has been common practice to drill out a stainless steel plate and use a liquidtight 90 connector. I have been told that this is now a code violation and i must use a wiremold box with a blank plate and drill out the bottom of box with a straight liquidtight connector. i cant find this in the code, can anyone help me out? Thanks
 
it was not an inspector, a fellow electrician or GC. I always ask and the answer is oh i'm not sure but that is the way we have to do it now. Now thats is all my company does but i cant find it in the code..
 
This is a pretty common installation technique and is permitted by the NEC in 314.22Exception as long as you have an EGC that doesn't rely on the cover for continuity.

314.22 Surface Extensions. Surface extensions shall be
made by mounting and mechanically securing an extension
ring over the box. Equipment grounding shall be in accor-
dance with Part VI of Article 250.
Exception: A surface extension shall be permitted to be
made from the cover of a box where the cover is designed
so it is unlikely to fall off or be removed if its securing
means becomes loose. The wiring method shall be flexible
for an approved length that permits removal of the cover
and provides access to the box interior and shall be ar-
ranged so that any grounding continuity is independent of
the connection between the box and cover.
Click to expand...
 
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