Gas Alarm panel wiring

[mshields]

First off, I suspect this is not an NEC driven requirement but if anyone knows the answer, I'd certainly appreciate it.

I've got gas alarm panel in a hospital (happens to be assciated with O2 for a hyperbaric chamber). The plumbing code requires that this alarm panel be annunciated in 2 24/7 locations and that the path of wiring be unique for each. We have always required this to be in rigid conduit of some type most typically EMT. This particular EC is challenging me to prove that this is required. He wants to use Interduct!

Does anyone know if the rigid conduit IS a requirement and if so, where it is documented to be so.

Thanks,

Mike

 

[VUGear]

If you're just talking about the alarm wiring and not the power wiring, as low voltage I don't think it's required to be in conduit.

 

[skeshesh]

Yea I agree, I don't think it has to be in a conduit. Having said that don't you guys have master specs or client specs that the contractor has to accept during the bid process? I've had a similar situation where a few years ago where an engineer who's my senior insisted I show rigid on some of my plans, and the contractor didnt want to use rigid for control wiring, so I finally told him it's in the specs.