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Air Handling Plenum
(Illustration 6-1)
Warm-air return
duct in plenum
Warm-air return through
fixtures to plenum
No ENT or PVC can be installed in an
air-handling plenum
See Sections 300.22(A)(B)(C)
EMT
Steel flex
Cool air supply
Air Handling Plenum
(Illustration 6-1)
ENT may be used as fixture flex tails above
a ceiling only where that space is not used
for air handling or environmental air
Box
Carlon ENT
Non-air
handling space
MAX - 6' length
of
1
/2" ENT with
No. 14 type THHN
Minimum 15 minute
finish rating
Recessed
incandescent
fixture
6. CAN ENT BE USED IN A RAISED FLOOR ?
Yes. Refer to Sections 300.22(D) and 645.5(D).