malachi constant
Senior Member
- Location
- Minneapolis
I am the engineer on a K-12 project where a contractor is performing work above an existing ceiling. The construction is CMU walls, EMT conduit, and ACT ceiling. The contractor has brought to our attention that much of the existing conduit above the ceiling, where it is attached the wall, is in fact attached to wooden 1x4s that are attached to the wall. The 1x4s are screwed into the wall, with standard EMT straps securing the conduit to the wood.
I am investigating whether the ceiling is plenum. Assuming it is not, does electrical code prohibit this? NEC 358.30 (securing and supporting EMT) does not address this, neither does 300.18 which it references.
Also, I can see in the photos that not all conduit is secured within 3' of junction boxes. Sometimes one conduit is properly secured, with other conduits just tie wrapped to each other. (But not even tie wrapped to the secured conduit LOL.) My guess is that is the kind of thing the inspector can decide if he wants to enforce cleaning up, but it is out of the scope of this project. Ditto the wood.
Thoughts on the woods supports, assuming it is a non-plenum space?
I am investigating whether the ceiling is plenum. Assuming it is not, does electrical code prohibit this? NEC 358.30 (securing and supporting EMT) does not address this, neither does 300.18 which it references.
Also, I can see in the photos that not all conduit is secured within 3' of junction boxes. Sometimes one conduit is properly secured, with other conduits just tie wrapped to each other. (But not even tie wrapped to the secured conduit LOL.) My guess is that is the kind of thing the inspector can decide if he wants to enforce cleaning up, but it is out of the scope of this project. Ditto the wood.
Thoughts on the woods supports, assuming it is a non-plenum space?