seal offs

[rayertz]

is a seal off required in a air supply house when a conduit passes thru a wall and there is a temperature change that the conduit will see to prevent condensation froming within the conduit and tracking back into the control panels?

 

[dkidd]

Yes, but not an explosionproof type fitting.

(A) Sealing. Where portions of a raceway or sleeve are
known to be subjected to different temperatures, and where
condensation is known to be a problem, as in cold storage
areas of buildings or where passing from the interior to the
exterior of a building, the raceway or sleeve shall be filled
with an approved material to prevent the circulation of
warm air to a colder section of the raceway or sleeve. An
explosionproof seal shall not be required for this purpose.

 

[rayertz]

is a seal off required in a air supply house when a conduit passes thru a wall and there is a temperature change that the conduit will see to prevent condensation froming within the conduit and tracking back into the control panels?

I found it...300.7

Seal off not required but the conduit shall be sealed. Duct seal should do the job.