Which color leg (black or red) should be switched for a 240V rangetop?

[miketwig]

I have a 240V range top that needs a wall switch added (for preventing an elderly person from using it when unattended). The existing feed is one black, one red, one bare ground. Which color leg should I break with a switch? Thanks

 

[James]

The red and black should both be switched by a suitable double pole isolator.

 

[miketwig]

The red and black should both be switched by a suitable double pole isolator.

Thanks. Would a Leviton MS302-DS work for this situation?

 

[Megawatt]

I have a 240V range top that needs a wall switch added (for preventing an elderly person from using it when unattended). The existing feed is one black, one red, one bare ground. Which color leg should I break with a switch? Thanks

You need a disconnect for both hot phases