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Discussion Starter · #1 ·
Hi
I install horizontal parallel feed, service drop on the roof of an commercial shopping center
I think I have to install concrete envelope around the pipes that are located in the middle of roof
The rest, that are on the edge of roof which is not really inside the roof area
I do not need concrete around , I think

What do you recommend???
Where in the code talking about this??
 

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Discussion Starter · #4 ·
Concrete encased on the roof??? Never seen it, probably never will. Who is requiring you to do this?
My Electr inspector at the rough inspection
He told me to encase the part of drop that is laid on roof surface
 

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animal lover /rat bastard
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Hi
I install horizontal parallel feed, service drop on the roof of an commercial shopping center
I think I have to install concrete envelope around the pipes that are located in the middle of roof
The rest, that are on the edge of roof which is not really inside the roof area
I do not need concrete around , I think

What do you recommend???
Where in the code talking about this??

ask inspector for a code reference. does this service feed a fire pump ?
 
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The only feeders I'm aware of that need to be concrete incased are for fire pumps. It's to meet a 2 hr fire rating and needs to be 2" thick around the conduit. If you look up fire pumps in the code book it'll explain more. I may be wrong, but I've never heard of any other application where it is required to incase your feeders in conduit. Some inspectors shouldn't be inspectors, some know a little and act like they know a lot.
 

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Homer to Jebus
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wat.



Ibtl.
 

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Discussion Starter · #10 ·
The only feeders I'm aware of that need to be concrete incased are for fire pumps. It's to meet a 2 hr fire rating and needs to be 2" thick around the conduit. If you look up fire pumps in the code book it'll explain more. I may be wrong, but I've never heard of any other application where it is required to incase your feeders in conduit. Some inspectors shouldn't be inspectors, some know a little and act like they know a lot.
Ok
I will request inspection again
And I will demand more explanation
Code references
But in a nice way

Thank you
 

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Hi
I install horizontal parallel feed, service drop on the roof of an commercial shopping center
I think I have to install concrete envelope around the pipes that are located in the middle of roof
The rest, that are on the edge of roof which is not really inside the roof area
I do not need concrete around , I think

What do you recommend???
Where in the code talking about this??
Outside of the building, unlimited length.
 

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The only feeders I'm aware of that need to be concrete incased are for fire pumps. It's to meet a 2 hr fire rating and needs to be 2" thick around the conduit. If you look up fire pumps in the code book it'll explain more. I may be wrong, but I've never heard of any other application where it is required to incase your feeders in conduit. Some inspectors shouldn't be inspectors, some know a little and act like they know a lot.
You also need them if "unprotected" conductors are routed in a building more then the allowed 5' (I think that'e right) through a building. I had to encase a feeder on a three story marina i designed a few years ago where the ground floor was only used to raise the structure above the flood zone and all the switchgear was on the 2nd floor.
 

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Discussion Starter · #13 ·
You also need them if "unprotected" conductors are routed in a building more then the allowed 5' (I think that'e right) through a building. I had to encase a feeder on a three story marina i designed a few years ago where the ground floor was only used to raise the structure above the flood zone and all the switchgear was on the 2nd floor.
Yes
I agree
That's what I though
Unprotected utility line after fire-disaster can fall inside the building
 
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