Cable Routing in Analog Vs Discrete Vs Comms

[dinnyshinny]

Just for the clarity and clear confusion::

Question 1:
Can Analog 24VDC vs Discrete 24VDC vs Comm (Ethernet) be routed in the same conduit?
Question 2:
Can Analog 24VDC vs Discrete 120VAC be routed in the same conduit?
Question 3:
Can Discrete 120VAC vs Comm (Ethernet) be routed in the same conduit?
Question 4:
Can Analog 120VAC vs Comm (Ethernet) be routed in the same conduit?

Appreciate your help in advance.

Thanks

 

[xnuke]

See this Link.

xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[MikeHalloran]

I think the NEC says it's permissible to route low voltage signals with higher voltage power in the same conduit, provided that insulation suitable for the higher voltage is used on all conductors. ... or something to that effect.

Note that the NEC is concerned with fire, electrocution, and other life safety issues, and does not concern itself with whether or how well the comms or low voltage signals will actually work in any of the instances you have suggested, unless the low voltage signals were associated somehow with safety, in which case you would have some 'splainin' to do.

In general, sharing the same conduit between power and signals is just a bad idea, and sharing conduit among dissimilar signals is also a bad idea, even if not expressly forbidden by someone. That does not mean that you can't get everything to work properly and be safe and reliable, given enough money and time. It's just usually not worth the trouble.





Mike Halloran
Pembroke Pines, FL, USA

 

[itsmoked]

dinnyshinny; The short answers is essentially Mike's. Don't do it unless you or your company are cheapskates that are willing to 'try' and get it working and are able to run systems that work most of the time and only screw up and act funny 'occasionally'.

The longer answer is it depends. IF the 24VDC stuff is not signals but rather actuator power signals and such then it will probably work. The Ethernet should just plain NOT be run next to power.

Keith Cress
kcress -

http://www.flaminsystems.com