DJFNEC2005
Member
- Location
- NJ
Hi Guys,
My question is a 2 part question to help me understand wiring methods under raised floors a little better. Thanks in advanced for all replies.
I'm bidding on a project that has a couple of Data room raised floors and I am trying to understand why I see most of the power wiring methods under these floors installed in liquid tight flexible conduit with devices installed in whether tight FS boxes and covers?
Going through the NEC I see that MC Cable is allowed and MC Cable is also plenum rated. The project I'm bidding does not fall under section 645 because it does not meet one of the five requirements for fire rated walls so I am referring back to section 300-22. The room does have its own HVAC system and a pushbutton to shutdown all equipment within it.
Questions:
1. If not required by the project specifications to be installed in a specific wiring method would MC Cable be acceptable to meet NEC?
2. Why do I see most power wiring under raised floors are installed in Liquid Tight conduit? Is it a NEC requirement that I'm missing or possibly just the requirements of the project specifications?
Thanks Again
My question is a 2 part question to help me understand wiring methods under raised floors a little better. Thanks in advanced for all replies.
I'm bidding on a project that has a couple of Data room raised floors and I am trying to understand why I see most of the power wiring methods under these floors installed in liquid tight flexible conduit with devices installed in whether tight FS boxes and covers?
Going through the NEC I see that MC Cable is allowed and MC Cable is also plenum rated. The project I'm bidding does not fall under section 645 because it does not meet one of the five requirements for fire rated walls so I am referring back to section 300-22. The room does have its own HVAC system and a pushbutton to shutdown all equipment within it.
Questions:
1. If not required by the project specifications to be installed in a specific wiring method would MC Cable be acceptable to meet NEC?
2. Why do I see most power wiring under raised floors are installed in Liquid Tight conduit? Is it a NEC requirement that I'm missing or possibly just the requirements of the project specifications?
Thanks Again