725.41(B), 727.5

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Dale001289

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Can a multiconductor 120V motor control circuit, i.e. TC-ER w/600V insulation, be routed in same cable tray with 300V ITC-ER instrumentation cable?
 
725.41(B), 727.5

Yeah. I’ve done a little more research; 300V and 600V can’t be run together in same conduit or cable tray unless there’s a barrier. 300V ITC cable can be used for 24VDC digital output signals i.e. PLC or DCS and other control applications that may fall into Class 1 circuitry.


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Dale001289 said:
Yeah. I’ve done a little more research; 300V and 600V can’t be run together in same conduit or cable tray unless there’s a barrier. 300V ITC cable can be used for 24VDC digital output signals i.e. PLC or DCS and other control applications that may fall into Class 1 circuitry.
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They can be run together if none of the circuits requires greater than 300V insulation.
 
Not sure how often that scenario would occur. PLC and DCS output signals are considered Class 1 circuits by default - even if they’re low energy- due to the Class 1 power supply, and therefore require 600V insulation. Unless of course ITC cable is used.


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Dale001289 said:
Not sure how often that scenario would occur. PLC and DCS output signals are considered Class 1 circuits by default - even if they’re low energy- due to the Class 1 power supply, and therefore require 600V insulation. Unless of course ITC cable is used.
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Where are you getting that Class 1 circuits require 600V insulation?
 
Dale001289 said:
Can a multiconductor 120V motor control circuit, i.e. TC-ER w/600V insulation, be routed in same cable tray with 300V ITC-ER instrumentation cable?
Click to expand...

Since TC-ER is a listed cable you can run anything with it including low voltage and communications. The fact that it carries 120V is irrelevant. So certainly you can run a ITC-ER cable with it in a cable tray.

-Hal
 
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