Conduit in ductwork??
Conduit in ductwork??
(OP)
Is it a code violation to route conduit through ductwork?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Conduit in ductwork??
Rafiq Bulsara
http://www.srengineersct.com
RE: Conduit in ductwork??
RE: Conduit in ductwork??
RE: Conduit in ductwork??
Rafiq Bulsara
http://www.srengineersct.com
RE: Conduit in ductwork??
RE: Conduit in ductwork??
Your mechanical is correct. Per NEC 300.22(B), you can run conduit in environmental air ducts or plenums as long as it complies with the list of items this code provision allows. That means basically that it needs to have an exterior metal finish, MC, MI cable, EMT, flexible metallic conduit-(up to 4'in length), IMC are all ok. Just don't use anything with a non-metallic covering.
Regards,
EEJaime
RE: Conduit in ductwork??
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Conduit in ductwork??
Check with local AHJ.
Rafiq Bulsara
http://www.srengineersct.com
RE: Conduit in ductwork??
Alan
----
"It's always fun to do the impossible." - Walt Disney
RE: Conduit in ductwork??
RE: Conduit in ductwork??
I find it sad that some people are using this forum to make people feel inferior compared to themselves by making comments that are not condusive to helping the person who has asked the question.
I must congratulate the majority of users for giving positive responses to all questions no matter the complexity and long may it continue!
UPS engineer http://www.powerups.co.uk
RE: Conduit in ductwork??
"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."
The AHJ may interpret this as only permitting conduit within ductwork that is directly associated with that duct's air handling, sensing or other associated functions.
RE: Conduit in ductwork??
Good on ya!
Goober Dave
RE: Conduit in ductwork??
I believe that passage in 300.22(B) is specifically referencing the equipment and devices which are allowed to be connected using the 1.2m(4ft) of flexible metal conduit. The sentences prior to it read:
"Flexible Metal conduit shall be permitted in lengths not exceed 1.2 m (4ft), 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 ...."
It does not limit conduit at all except specifically flexible metal conduit connecting said equipment and devices.
Regards,
EEJaime