Mixed Voltage Wiring Rules

[jimmy_mcquade]

Hi everyone,

dad is on a jobsite and asked me to look up something for him.

is there any NEC rules that prevents you from placing 24 Volt dc signal
wires in the same conduit / wiring trough with 120 volts ac, 220 vac, 440 vac.

i know that the electrical insulation of the wire must all be the same, but i can't remember where its located. are there any specific rules against this.

thanks,
jimmy

 

[rcarroll]

Take a look at 300.3(C)(1). :wink:

 

[don_resqcapt19]

Take a look at 300.3(C)(1). :wink:

But make sure you read the FPN. I would expect that the 24 volt conductors are covered by Article 725.

 

[jimmy_mcquade]

thanks,

these are plc inputs & outputs, so that helps.

thanks again,
jimmy