300 volt and 600 volt

[domnic]

300 volt and 600 volt wire in same box the highest voltage in the box is 120 v for a light the low voltage is for a 12 volt door bell is this 0k.

 

[infinity]

Probably not. Good chance that the doorbell is fed from a Class 2 power supply which means the conductors must be separate regardless of insulation value.

 

[domnic]

Probably not. Good chance that the doorbell is fed from a Class 2 power supply which means the conductors must be separate regardless of insulation value.

What if i had 240 v to ground and 120 v to ground with same wire 300v and 600v rated?

 

[Lectricbota]

What if i had 240 v to ground and 120 v to ground with same wire 300v and 600v rated?

As long as the highest voltage is lower than the lowest insulation rating you are OK.

 

[GoldDigger]

As long as the highest voltage is lower than the lowest insulation rating you are OK.

But be careful to account for the fact that the insulation must be good for the maximum line-to-line voltage, not just the line to ground voltage. So the result will be different between the 240 being 120-0-120 or 0-240 or 240 3-phase delta.
If the 240 is 0-240 and the 120 is 120-0, with the opposite phase to the 240, then the maximum line to line voltage will be 360.