480 voltage wires mixed with 120

[leon2012]

Is it ok to run 3 480 volt wires with a 120 V circuit in a 3/4 EMT pipe?

 

[roger]

In most case yes, if they are emergency circuits and non emergency circuits the answer would be no.

Roger

 

[Rewire]

yes you can

 

[don_resqcapt19]

Are all of the conductors power circuit conductors?

 

[DARUSA]

Is it ok to run 3 480 volt wires with a 120 V circuit in a 3/4 EMT pipe?

As long that both insulation are rated for the maximum voltage!! In this case 480 volt (thhn is rated for 600volts)

 

[petersonra]

There is no general prohibition on mixing voltages in a conduit.

There are some requirements that may come into play though that might have an impact on a specific installation. Previous posters have mentioned some of them.