110 and 4-20 signal in the same function conduit

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725.26 (A) This is possible if all conductors are insulated for the maximum voltage of any conductor.
The maximum voltage is 110volts standard jacket insulation is 600volts. Do I need 600 volt rated signal cable or can I just go above 110volt since that is the maximum voltage in the conduit? It states it must be insulated for the maximum voltage of any conductor in the raceway, not the maximum voltage jacket insulation rating.
 

don_resqcapt19

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I would not expect that the 4-20 mA signal wire is a Class 1 control circuit. If it is fine, but if it is a Class 2 circuit, it can't be in the same raceway even where functionally associated.
 
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