Is "sealtite" flex conduit plenum rated ?

[flashlight]

We need to get a short run out the front door of a building to feed
heaters over sidewalk-- is "sealtite" conduit through the air intake duct over
front doors acceptable ?

 

[DARUSA]

No sealtite is allowed!!!!!

300.22 (B) Ducts or Plenums Used for Environmental Air. Only wiring methods consisting
of Type MI cable, Type MC cable employing a smooth or corrugated impervious metal
sheath without an overall nonmetallic covering, electrical metallic tubing, flexible
metallic tubing, intermediate metal conduit, or rigid metal conduit without an overall
nonmetallic covering shall be installed in ducts or plenums specifically fabricated to
transport environmental air. Flexible metal conduit shall be permitted, in lengths not to
exceed 1.2 m (4 ft), to connect physically adjustable equipment and devices permitted
to be in these ducts and plenum chambers. The connectors used with flexible metal
conduit shall effectively close any openings in the connection. Equipment and devices
shall be permitted within such ducts or plenum chambers only if necessary for their
direct action upon, or sensing of, the contained air. Where equipment or devices are
installed and illumination is necessary to facilitate maintenance and repair, enclosed
gasketed-type luminaires shall be permitted

 

[SEO]

Take a look at section 300.22 (B). This section will list approved methods and sealtite is not listed.

 

[George Stolz]

Probably ought to run FMC, then set a box outside and switch to LFMC.

 

[augie47]

Don't believe sealtite is, but FMC is.
See 300.22(C)

wow! all at once

 

[flashlight]

Thanks !

 

[flashlight]

Wound up running rigid conduit to the outside through the aluminum door jamb.
(no clearance to go outside jamb) A pain in the keester, but better IMO.