What is in this article?:
- Class 1 Hazardous Locations
- SIDEBAR: How Hazardous is It?
- SIDEBAR: The Rules for Threaded Conduit [500.8(E)]
- SIDEBAR: Optical Fiber Cable is Not Created Equal
Understanding 2011 revisions to Chapter 5 of the NEC
SIDEBAR: Optical Fiber Cable is Not Created Equal
Composite optical fiber cable contains current-carrying conductors [770.2], and they’re capable of causing a dangerous spark that can ignite flammable atmospheres. In a hazardous location, you must install them the same way you install other conductors.
On the other hand, nonconductive optical fiber cable [770.2] has no current-carrying conductors or metallic strength members, so it can’t ignite flammable atmospheres. Consequently, you don’t have to install it in accordance with Articles 500, 501, 502, or 503.