If you do not know this, you should probably let someone who does do the wi ring.
A 30 amp double pole breaker, times the 240 volts will supply up to 7,200 w atts.
That is only an oven ? On its own breaker a 30 amp will be fine. An electri c stove with an oven (not just a cooktop) usually requires a 50 amp which i ll supply up to 12,000 atts, and requires heavier guage wire. It also uses a special outlet so it is not confused with an air conditioner, clothes dry er or whatever.
Amma tellya what, if you do not know what you are doing just pay someone we ho does. you cannot trust youtube fro instructions, or books, or even the g uys down at the local DIY type store. In fact you can't even trust people o ut of the phoine book, even if they are licensed, bonded and insured. If yo u want it done right, tell the electrician himself that you want to see his journeyman's card from the union. Tell the company on the pohone you want to see that.
I know tis would cut me out of the job for you, but so be it. I have a rep locally and people know I can do it, and to code. In fact better than code. But apparently you don't have the luxury of knowing someone local. Otherwi se this might have been done for a case of beer or something.
If you do htis yourself, make sure the wire is as big as possible. Also, an d more importantly, tighten the screws. I mean tighten them until you think they will breakk, they won't. Also wiggle the wire as you tighten the conn ections. Sometimes you wiggle it and find it WILL tighten just a little bit more. MAKE SURE IT IS DEAD TIGHT.
When they said loose wires cause fires they were not kidding. Really, you a re more likely to have a fire with a loose wire than one that is of a bit t oo small of a guage. In the former situation the heat is all concentrated a t the faulty connection poit, in the latter with the too thin wire it is di stributed pretty much evenly through the whole length of the run. Not reall y safe, but less unsafe than a loose connection.
You can look up AWG ratings on Google for all kinds of specs on this. In fa ct I have a table of all that somewhere on the PC but will never find it. O n the web it gives you the ampacity of all the guages, and you might find o ne for aluminum wire as well but I think that has been outlawed in the US e xcept for the main lead in. But then that only goes from the meter to the p anel and tose fitting are made for it. Don't use aluminum wire inside the h ouse for anything even if it is legal where you live.