My old cooktop which is being replaced connects to a j-box with black, red, white, and bare ground wires, which goes to a 40 amp circuit breaker (US here, noticed this site is popular with Europe too).
We just bought a brand-new Bosch cooktop which only has black, red, and bare ground wires and says, "Connect only to a 3-wire, 120/240-volt power supply; the neutral conductor is not required for the operation of the appliance. The potential at the power supply electrical connections shall be 150-volts-to-ground or less." It also mentions wanting a 30 amp circuit breaker and being compatible with 240 or 208 volts (which I believe means it can handle single or 3-phase current, which is good since I don't know which we have).
I may be mixing up two questions here (circuit breaker amps and neutral wire issue) but can I wire this to the existing setup, or do I need to have the electrician come in and change something at the breaker box?
Note that I am fully aware the right answer is to call the electrician in to handle this and double-check everything -- I feel it is important for me to understand how this all works before calling someone in so when I talk to them I can make sure we are on the same page.