ArcNSpark
Member
- Location
- Coventry, RI
Guys,
Thanks in advance for reading and/or helping out.
The 2011 NEC stated in 690.31(E) that when running conduit or raceway for DC systems within a structure, we had to maintain a minimum of 10 inches below the roofline. The main purpose of this requirement was to protect any firefighters that were using a demo saw to open up the roof to let out the heat and smoke, so that they wouldn't accidentally cut through 500 VDC. (I know, the rapid shutdown should discharge the voltage in the wires, so don't all jump on me )
I was on a job today and in one spot, our wiring is 11" below the roof line. I checked my NEC to make sure that it was a 10" requirement, not 12", and discovered that the 10" requirement has disappeared in the 2014 code book.
I asked the local AHJ and fire marshal, but nobody knows what happened. Do any of you?
Thanks again.
Thanks in advance for reading and/or helping out.
The 2011 NEC stated in 690.31(E) that when running conduit or raceway for DC systems within a structure, we had to maintain a minimum of 10 inches below the roofline. The main purpose of this requirement was to protect any firefighters that were using a demo saw to open up the roof to let out the heat and smoke, so that they wouldn't accidentally cut through 500 VDC. (I know, the rapid shutdown should discharge the voltage in the wires, so don't all jump on me )
I was on a job today and in one spot, our wiring is 11" below the roof line. I checked my NEC to make sure that it was a 10" requirement, not 12", and discovered that the 10" requirement has disappeared in the 2014 code book.
I asked the local AHJ and fire marshal, but nobody knows what happened. Do any of you?
Thanks again.