Is it necessary to separate 24vdc from 125vdc in wire ducts?
Is it necessary to separate 24vdc from 125vdc in wire ducts?
(OP)
I have I/O modules which have 24vdc control power. all the I/Os are 125vdc. Can these voltages be mixed in the wire ducts without an issue?





RE: Is it necessary to separate 24vdc from 125vdc in wire ducts?
RE: Is it necessary to separate 24vdc from 125vdc in wire ducts?
However, that fact that it is allowed under the NEC does not mean that there could not be some noise-related issues.
RE: Is it necessary to separate 24vdc from 125vdc in wire ducts?
Keith Cress
kcress - http://www.flaminsystems.com
RE: Is it necessary to separate 24vdc from 125vdc in wire ducts?
RE: Is it necessary to separate 24vdc from 125vdc in wire ducts?
In the NEC, Article 800 (for communication cables) and Article 725 (for signalling cable) both state that power cables and other cables can be installed in the same raceway as long as they are separated by a barrier. For example, I just had some 12" wide fiberglass cable tray installed. It is separated into an 8" wide section and a 4" wide section by a fiberglass barrier. That way, I can run power cables in the 8" section and instrumentation cables in the 4" section.
RE: Is it necessary to separate 24vdc from 125vdc in wire ducts?
The configuration is that I have a AB Flex I/O. The Control net adapter is powered by 24vdc. The rest of the input modules are 125vdc. I have one duct running down the connect side of the devices which would require me to put that 24vdc Controlnet power and the 125vdc inputs in the same duct.
RE: Is it necessary to separate 24vdc from 125vdc in wire ducts?
125VDC is commonly used in the power industry. Switches, solenoids, protective relays, switchgear and more.