I just wanted to run something by the forum to make sure I wasn’t missing anything. Here is the way I interpret it. Article 517.30(B)(1) breaks the Essential system down into two parts. The Emergency and the Equipment systems. The Emergency system is further broken down into the Life Safety Branch and the Critical Branch. Now, 517.30(C)(3) is titled "Mechanical protection of the Emergency System." This section applies to the emergency system (Life Safety and Critical) as defined above. Even though it does not specifically mention it, the Equipment System does not apply to this section and therefore is not required to be run in a non-flexible metallic wiring method. Anyone disagree?!!
[This message has been edited by Nick (edited 05-08-2004).]
Nick, in the 99 code book look at the last sentence of 517-30(c)(3), it says; Where installed as branch circuit conductors serving patient care areas, the installation shall comply with the requirements of Section 517-13
This meant that 517-13(b) would allow flexible wiring methods if the armor was listed or approved as an EGC.
Is there an ROP stating the reasoning for deleting this sentence? I have always thought that was there to make sure emergency circuits met the redundant grounding requirements of 517-13. Someone could meet the requirements of 517-30(C)(3) by running EMT without an equipment grounding conductor (using the EMT as an equipment ground)in non patient care areas. I have never read that as allowing flexible methods in patient care areas.