ECN Forum Forums General Topics of the Trade General Discussion Area Air hose in conduit ?

What about the static buildup with the air flow through plastic conduit?

Pierre

How does the use of flexible cable/hose carriers on elevator cars and other moving machinery square with 300.8 in the NEC? Are these devices not considered either raceways or cable trays?

I ask because I recently installed such a system, and the manufacturer had specific instructions for installing hydraulic lines, air/water hoses, etc., along with power and control wiring. My installation included lots of low voltage instrumentation, several video cables, a 120VAC power circuit, and a 1/4" compressed air line. The system in question is an "Energy Chain" by Igus, Inc.
http://igus.bdol.com/echain/ec_cat1.asp?p=ec_6_48.gif

The NEC almost says, but stays short of saying "Stay out of the Elevator shaft"

I'm sure they have just as strict, if not more so, code issues as we do. And, with an open baffle type design, not so much an issue with other services going together, where it might be more nessesary to have them together. (As a more important safety issue....) Where being in an enclosed pipe would (un-nessarily)....

[This message has been edited by e57 (edited 08-16-2004).]