Allowable use for 3/8" flex?

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mweiss

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As far as art. 348 (flexible metal conduit) is it permissable to use 3/8" flex to go from a 4"sq. box above a t-bar ceiling to a box mounted in the ceiling tile for a cord drop providing wire fill is met and boxes are supported properly. The length of the 3/8" flex is only 2'.
 
Here are the requirements for using 3/8" FMC. Sounds like it's being used as part of the branch circuit wiring and not as one of the installations listed below. Therefore IMO it's not permitted as described.

348.20 Size.
(A) Minimum. FMC less than metric designator 16 (trade size ?) shall not be used unless permitted in 348.20(A)(1) through (A)(5) for metric designator 12 (trade size ).
(1) For enclosing the leads of motors as permitted in 430.245(B)
(2) In lengths not in excess of 1.8 m (6 ft) for any of the following uses:
a. For utilization equipment
b. As part of a listed assembly
c. For tap connections to luminaires as permitted in 410.117(C)
(3) For manufactured wiring systems as permitted in 604.6(A)
(4) In hoistways as permitted in 620.21(A)(1)
(5) As part of a listed assembly to connect wired luminaire sections as permitted in 410.137(C)
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When I wire commercial kitchen hood systems, I use it for housing microswitch and gas solenoid valve wires. Usually, the source is from MC I've stripped. Of course, I use bushings.
 
infinity said:
Here are the requirements for using 3/8" FMC. Sounds like it's being used as part of the branch circuit wiring and not as one of the installations listed below. Therefore IMO it's not permitted as described.
Click to expand...

I hadn't thought about that Rob, good point. I automatically thought MC for some reason
 
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