Condensation from Conduit

[rrr_usty]

We have, an existing conduit run starts from a pull box mounted on a wall in a large cooler (38.5F) is exposed to this temperature for about 50 feet, then goes thru an suspended ceiling that is insulated (not very well), (47.5F) on the other side of the suspended ceiling, we go back into the cooler and down towards a (1600A/480V) switchgear room.
The temperature at the ceiling of the S.G. room is 71.8F, the ceiling of the S.G. room is insulated & has "Great Stuff" foamed around the conduit, we have been experiencing condensation dripping from the set screw couplings of the EMT that feeds the S.G. room.
A creative idea was we insulate the EMT with a fiberglass insulation from the S.G. room up to the suspended ceiling and from the other side of the suspended ceiling (after that space is repaired) to the pull box following up with Duct seal at the pull box to keep the air out.
The S.G. room was installed to stop the condensation in the 1st place.
What are your thoughts?

 

[don_resqcapt19]

Did the installer comply with the rule in 300.7(A)?

 

[kwired]

To stop condensation you need a seal inside the raceway. If warm moist air migrates into the colder locations (and it will) it will condense. Even just plugging in one location so natural air movement is interrupted makes a big difference.

 

[StarCat]

Conduit seal

Conduit seal

Kwired is absolutely correct.
It is common practice with all Savvy Refrigeration men to seal all conduits coming in and out of walk in rooms to stop atmosphere within the pipe. IN the old days it was done with permagum. Most people use a shot of foam. Some use caulk.
Correct and proper sealing of all penetrations and conduits will set a good install far apart from a typical one.

Sincerely

 

[fmtjfw]

I have seen condensation completely destroy a WireMold? 1 gang steel box, It was inside a room with a ?" conduit from the back of the box feeding a light fixture 8" away on the outside of the building wall. It was not plugged, and the box had essentially rusted away.

 

[BAHTAH]

Condensation Problem

Condensation Problem

We have, an existing conduit run starts from a pull box mounted on a wall in a large cooler (38.5F) is exposed to this temperature for about 50 feet, then goes thru an suspended ceiling that is insulated (not very well), (47.5F) on the other side of the suspended ceiling, we go back into the cooler and down towards a (1600A/480V) switchgear room.
The temperature at the ceiling of the S.G. room is 71.8F, the ceiling of the S.G. room is insulated & has "Great Stuff" foamed around the conduit, we have been experiencing condensation dripping from the set screw couplings of the EMT that feeds the S.G. room.
A creative idea was we insulate the EMT with a fiberglass insulation from the S.G. room up to the suspended ceiling and from the other side of the suspended ceiling (after that space is repaired) to the pull box following up with Duct seal at the pull box to keep the air out.
The S.G. room was installed to stop the condensation in the 1st place.
What are your thoughts?

I guess the answer to Don's question is no. 300.7(A) Like Don said and your problem will most likely be solved.