Installing new cook top

I am installing a new 220v cook top -- the cook top has two wire with ground (black & Red wire) but my line coming in from the breaker has three wire with ground (black, red and white). I think I should connect black to black, red to red, and white to the ground wire (and then I assume the extra ground coming form the circuit breaker to the ground screw in the junction box) but could some one please confirm.
Thanks

 

The wiring should be black to black, red to red, (the white wirenutted off as it is not used for your cooktop) the grounds are then connected together, and to any ground screws in the system.

I must caution you to make sure the cook top requires the same amps as your service is now providing, if it doesn't then you will have to change the breaker to suit the unit. The wire should also match the size of the cooktop although larger wire is ok but smaller the the ratings of the unit is not. If this was the wiring to your stove then the wire size is most likely not a problem but the breaker size might be.

 

Thanks - but I thought the the black and red bring in 110v each and the white completes the circuit - I will try it though. On the CB and wire sizing both I think are fine - I am replacing the cook top with another of similar wattage.
Thanks for your help

 

The white is not needed to complete a 240-volt circuit. The black and red are sufficient. The black and red of this 240-volt circuit work exactly like the black and white of a 120-volt circuit.