Conductors Considered Outside the building

[nonsinusoidal]

It is my understanding that in order for conductors or cables to be considered outside a high rise building NEC 230.6 shall be applied for the installation of the vertical raceways encased in concrete not less than 2 inches thick. Can anyone tell me what type of conduits are allowed to be installed in the vertical raceways and how are they to be supported ? Please reference the NEC CODES that appropriately provide an answers to the latter questions... Thank you in advance

 

[alehman]

The type of conduit is not specified, so any type of conduit that is otherwise allowed by the NEC would be permitted. It would need to be a type that is allowed to be encased in concrete.

Alan
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"It’s always fun to do the impossible." - Walt Disney

 

[nonsinusoidal]

Alehman,

"so any type of conduit that is otherwise allowed by the NEC would be permitted" Please explain THE FOLLOWING " otherwise allowed by the NEC" allowed where?

 

[alehman]

In other words the conduit type would have to be allowed for your application were it not encased in concrete.

For example, the NEC wouldn't allow ENT for a medium-voltage feeder so you can't use it for your application encased in concrete.

Alan
----
"It’s always fun to do the impossible." - Walt Disney

 

[resqcapt19]

If the run is long, you may have an issue installing the conductor supports that are required by 300.19 and still keep the conductors "outside of the building".