2 wires and ground to oven with 3 wires and ground
Regarding the cooktop: It has NO 120 v component, no timer, electronic controls, etc. Again it has a red, black, and bare ground in the whip. I have also looked around at a number of models like this and none requires anything more than 40 amp circuit and 8 gauge wire. Regarding the double oven: It has some 120 V components, a timer, electronic controls, and lights (it is a pretty modern system). I also downloaded the manual for this model from Maytag's site and it indicates that 8-gauge wire should be used, but the drawings only indicate a 4-wire whip. I triple-checked again tonight and I can only find the 3 wires - red, black, and white. I couldn't pull the ovens out as we were working on the floors. I can do that later. So I am wondering what to do. I can try to call Maytag and see if someone can help me. However, the manual has confused me - perhaps it is for a more recent version of this particular model double oven. Then manual also says If codes permit and a separate ground wire is used, it is recommended that a qualified electrical installer determine that the ground path and the wire gauge are in accordance with local codes. Check with a qualified electrical installer if you are not sure the oven is properly grounded. This oven must be connected to a grounded metal, permanent wiring system. Manual also says 40 am service - 8 gauge wire required.
Your house has a 3 wire receptacle and your stove has 4 wires correct. So you have a newer stove and you need to know how to hook it up right? Okay In your stove your going to have three terminals, two colors such as red and black and between them you have a neutral wire or white wire. So since you don't have a neutral at the outlet just hook up the ground wire to the neutral connection on the stove. Bingo! Oh now that your not grounded you may want to run a ground wire to a plumbing pipe or to a true earth ground rod. Don't leave yourself unprotected.
You need to replace the cable with a three wire plus ground.
You have not told us whether you are replacing an existing oven or trying to add a new oven. If you are replacing an old oven with a newer model that has a factory installed whip the ground (green) and neutral (white) wires simply need to be tied together with the existing ground/neutral of the supply feeder. If the oven does not have a factory installed whip, the appliance should have a bonding strap that goes between the ground and neutral terminals on the appliance itself. In either case, you need to make sure that the supply feeder has the proper current rating for the new appliance (e.g. if the circuit is 30 amps but the oven requires 40 amps, you will need to upgrade the circuit). If you are trying to wire a new oven where one didn't exist before, then you cannot use any existing wire and must upgrade to current code.
You gotta know if the oven is supposed to be a 240 VAC input ... or? and what is the three wires ground a three phase circuit? you had best know for sure before you go connecting anything.
