How do I determine breaker amps on a 240v double breaker?

I have a new elec. cooktop that needs 240V, 40 amps.

Each pole of the double pole breaker for my cooktop circuit
says 30amps. So can this 240v circuit support 60 amps, or just
30?


The markings on a double pole breaker don't add. Ideally we'd need the aproximate length of the wire and the type of wire (Copper or aluminum) to make a determination if you can just change the breaker.

Some cooktops are requiring a 4-wire circuit.