Which is live and which is not, there is a black wire and a blue wire?
The oven is rated at 220 volts they are both hot conductors.
That's it? A black wire and a blue wire? Hmm...I'd say that they are both hot if you have 240V single phase power. If it's multiphasic, they could be either delta to delta or delta to center tap. Didn't it come with a cord to plug it in? You are also overlooking a bonding screw used for grounding. Look for it, hook it up too. Tell us what the back plate says. (voltage, phases, watts, etc.)
