Stove has Black, Red, and Ground. Box on wall has Black, Red, White, and Ground. What do I do with the White Wire?

Since you have a red wire you must have 10-3 romex. 10-3 has four wires. Three jacketed wires Red, Black, White and a bare copper wire. The is Red and Black are your two 120 legs (both hot) white is neutral and the bare is ground.

No you do not. You have a 220 system. What you do to hook it up is. In the box in the wall you should have 3 wires. 2 black and one white. Then on the cooktop you have the 3 wires 1 black, 1 red, and 1 white. You take the black from the cooktop to the black in the wall box. Take the red to the other black in the wall box. then take the whites and put them together. Now if you have a green or bare wire that is the ground. Just hook that to the wall box.

If you have any questions please ask.

This is not to code. The white is neutral and is of the same polarity as a bare wire. The red and the black are considered hot and would be 220.

white and ground are grounds there should be a ground rial in the fuse box, stove is 220 black and red go to 2 seperate breakers, 25 amps, and 15 amp is for 110 regular outlet

Here's what I'd do. Use a voltmeter and test the wires. I think what you're asking is right, But there isn't any way to be sure you're right without testing the leads. You'll have two 120 volt (hot) leads and a common return which is also ground (eventually).
Hope this is what you need.
Regards, WoobieDog--

sound like you have a three wire setup on you house most commonly the black wire is the L1 wire or one of the hot wires and the red is the L2 wire and is also one of the hot wire in this instance your white wire would be your neutral/ground wire this would connect to the copper wire on your cook top depending on the model it would have a red wire a black wire and the copper wire but some may also have a white wire also if this is the case on a three wire setup you would attach the copper and white wires together also if needed you can goto the maufactures website and download an instalation guide.

those wires dont go to the down draft. those colors are to hook up the stove. do you have the instalation instructions?

In a normal house, black and red are the hot wires and are wired to a circuit breaker or fuse at the panel box. White goes to the ground bar. Sometimes the white(neutral) is seperated from the ground. Sometimes they can be connected together. At the fuse box they both go to the silver ground bar. If you are attaching a cord and plug purchase one to match the outlet you have. Usually at the terminal block the hot wires are on the outside. Neutral in the middle. At the terminal block there is a metal strap or wire going from the center terminal to the frame of the stove. If the cord you have is just 3 wires leave it. If the cord you have uses 4 wires remove the strap and connect it seperately to the green or ground wire on the cord.

Are you sure that is the proper wire from the wall? What you are describing is a 110 volt circuit. THis cooktop should be connected with at least #10 wire and fused at 30 amps. You should have black red and at least white with possible bare ground wire. Assuming somebody used the wrong wire during original install job, you have it connected right. Please replace with heavier wire if it is not #10 Or at least make sure it is fused at no more than 20 amps if smaller wire. (You may sometimes blow circuit breaker if all burners are used on high at once) Use a volt meter and check voltage. If this is a 220 volt circuit you should have 220 volts between black and white and 110 volts from either one to bare ground wire.

I'm assuming this is a 220/240v unit. The wall has two blacks, each with reference to white is 120v. Since you need 240 volts, you need to use both blacks. The third wire you'll need is ground. ALWAYS make sure you use a ground wire!!

Realistically, the white is connected to the Ground terminal in your circuit breaker box. Best practice says cap off the white, and use the GROUND.