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Code requirements for running liquid tite from sub panel into ground

Code requirements for running liquid tite from sub panel into ground

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  #1  
Old 05-25-20, 01:59 PM
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Code requirements for running liquid tite from sub panel into ground

Using UFB cable out of the bottom of a sub panel into liquid tite metallic reinforced flex conduit for about 15 across a wall before it goes down into the ground for a short distance and then the UF-B cable is direct buried for a long 100+ foot run out to a receptacle in the back of the property. There will be a little sweep coming out of the bottom of the panel.

1. What does the code say about how high off the ground to secure the conduit?
2. What distance apart each fastener needs to be to secure the conduit?
3. How far underground does it need to run before“ terminating” To just the UFB cable?
4. What else am I forgetting?
 
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Old 05-25-20, 02:10 PM
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Why not use PVC conduit instead of flex.
Flex is tough to run across the wall while keeping neat and straight.
 
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Old 05-25-20, 03:05 PM
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I have a spare roll of it. So donít need to reinvent the wheel. As to my questions?
 
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Old 05-25-20, 03:10 PM
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You can install Sealtite/liquidtight flexible conduit in lengths longer than 6' but only if it's securely fastened within 12" of a box and at intervals less than 3'.
 
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Old 05-25-20, 07:24 PM
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1. What does the code say about how high off the ground to secure the conduit?
Nothing. Your choice
3. How far underground does it need to run before“ terminating” To just the UFB cable?
No specific distance. Enough to keep it from damage.
4. What else am I forgetting?
The cable needs to be clamped either as it exits the panel (the conduit is being used as a sleeve), or when it exits the conduit.

Otherwise, it sounds fine.
 
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Old 05-25-20, 08:01 PM
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The cable needs to be clamped either as it exits the panel (the conduit is being used as a sleeve), or when it exits the conduit.

I have to laugh about this. I would challenge any inspector to be able to pull 12 AWG through 20 feet of 1/2Ē flex conduit with 4 sweeps to it. That cable isnít going anywhere. Although I get it. The conduit could pull free of the panel and rip the cable with it....
 
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Old 05-26-20, 12:06 PM
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I would challenge any inspector to be able to pull 12 AWG through 20 feet of 1/2” flex conduit with 4 sweeps to it.
No pro would even try that. UF cable doesn't belong in conduit.
 
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Old 05-26-20, 03:14 PM
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Hi, just curious, is there any way that UF could be stapled along the sill to the location where it goes into the ground, lot easier then trying to pull it through the LT. what size LT are using?
Geo
 
 

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