cable insulation class

[marshavillareal]

I thought there was a restriction in the code where you could not mix cables different voltage class insulation in the same raceway regardless of the voltage on the cable, but all I can find is 300.3(C)(1) where it states ?Conductors of ac and dc circuits, rated 600 volts, nominal, or less, shall be permitted to occupy the same equipment wiring enclosure, cable or raceway. All conductors shall have an insulation rating equal to at least the maximum circuit voltage applied to any conductor within the enclosure, cable, or raceway.?

Am I mistaken, are you allowed to mix 300V and 600V as long as you don't exceed 300V on any of the cables?

 

[wireguy8169]

Thats how I read it...as long as your max voltage is not higher than the 300V insulation as you stated..

 

[steve66]

Am I mistaken, are you allowed to mix 300V and 600V as long as you don't exceed 300V on any of the cables?

If all your 300V wires are in one cable, and all your 600V wires are in another cable, I don't think you are limited to 300V on the 600 V cable.

Not sure if anyone else agrees or not??

 

[raider1]

I thought there was a restriction in the code where you could not mix cables different voltage class insulation in the same raceway regardless of the voltage on the cable, but all I can find is 300.3(C)(1) where it states ?Conductors of ac and dc circuits, rated 600 volts, nominal, or less, shall be permitted to occupy the same equipment wiring enclosure, cable or raceway. All conductors shall have an insulation rating equal to at least the maximum circuit voltage applied to any conductor within the enclosure, cable, or raceway.?

Am I mistaken, are you allowed to mix 300V and 600V as long as you don't exceed 300V on any of the cables?

Keep in mind that if you are talking about a Class 2 or 3 circuit 300.3(C)(1) does not apply and you are not permitted to mix Class 2 or 3 circuit with power and lighting circuits.

Chris