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Liquid tight Flex - Max. Size

Liquid tight Flex - Max. Size

Liquid tight Flex - Max. Size

The code states that 4" is the max. size allowed for liquidtight flex. If this is correct, why is larger sizes even made? I have 6" all over my jobsite.

RE: Liquid tight Flex - Max. Size


Good question.

Article 347 states that you can have rigid nonmetalic conduit up to 6". Article 351 as you say states that the maximum for liquidtight flex is 4".

I had 6" flex in my mill that was grandfathered all the way into the early 80's. I can see what I can find out for you, but as code stands, new installations of 6" flex is not code compliant.


RE: Liquid tight Flex - Max. Size

The 93 code put the limit on flex as 4".
Flex and fittings are still made and ul listed up to 6".  I think you could still use it if you needed to.  Every thing is the code is dependant on the judgement of the "Authority having jurisdiction" which is your local inspector.  
I don't know why the limit was put on size, probably some group somewhere abusing the stuff.
If you need it talk to your inspector first and get it approved.

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