Flexible Metallic Conduit

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wizzzard11

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Can anyone give me the code ref. on this? I have always used this method to avoid drilling holes in beams and using metallic flexible tubing as a sleeve to run the romax below the beam. I was told by an inspector recently to put a ground clamp on it and run a green or bare ground wire to an outlet box and hook it to the grounds in the box. I do understand that the tubing is ungrounded if it does not connect to a grounded metal box but I was not given the reference by the inspector. I was given the option to use pvc or seal tight.
 
wizzzard11 said:
Can anyone give me the code ref. on this? I have always used this method to avoid drilling holes in beams and using metallic flexible tubing as a sleeve to run the romax below the beam. I was told by an inspector recently to put a ground clamp on it and run a green or bare ground wire to an outlet box and hook it to the grounds in the box. I do understand that the tubing is ungrounded if it does not connect to a grounded metal box but I was not given the reference by the inspector. I was given the option to use pvc or seal tight.
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Read 334.15(C), Last sentence.

(You should start a new thread for a new question)
 
The is no requirement to ground or use the FMT. If physical protection is required the you need to use one of the methods in 334.15(B) of which FMT isn't listed.
 
The name of the tread

Flexible Metallic Conduit

What the OP posted

using metallic flexible tubing
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Those are different products FMC Article 348 and FMT Article 360.

As Trevor pointed out FMT is not listed in the NEC for protection from physical damage.

That said I bet he is using FMC. :)
 
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