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Re: COOK TOP WIRING
You have Red and Black HOT wires and a Green Neutral - That is 220 volts. From the wall - Black is Normally HOT and White is Neutral. That is 110 volts. If that is a typical household outlet, is will only supply a demand at about 15 amps while running at 110 volts. Your Cooktop will most likely demand somewhere around 50 amps at 220 volts. - Short Answer - You will need to have a 220 volt supply line ran to the cooktop from the breaker. Easy to do but dangerous if you are unfamiliar with high voltage.
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The white one may just form an earth loop,, I recently had a ceramic plate needing cleaned so we did the whole lot, I think most hobs have 4 wires and they are numbered rather than colour coded..hope this helps
try to use black to black: white to red: and green and white to ground. you may not have a 240 volt supply to this unit. most of the time when you have these color wires that would tell me that it only has 120 volts of power. you can try to wire it up as described, but it may not heat enough with just 120 volts. what type of cook top did you replace, a gas unit and now your changing it to an electric one? if so, then you will have to replace the wiring inside the wall with the proper size wiring to handle the extra current from an electric unit.
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.
Older 3 wire connectors where Wht=Neutral Ground Return, Red=One Phase Hot, Blk=Second Phase Hot, of 220VAC stove connections.
Newer Electrical code standard has a forth wire that is bare copper for a separate safety ground return. I suggest you but a 4 wire pig tail cable for your stove top, available at Depot or Lowes, and connect 3 wires of this 4 wire cable just like the 3 wires are now connected. The 4th bare copper safety is attached to any metal part of the stove. Find a screw you can loosen to wrap it around and tighten.
SOMETHING DOENST SOUND RIGHT ABOUT THAT AT ALL. i would contact an electrician, would not even want to venture a guess as to whats goin on . let alone advise to hook up a ground to a nuteral and cap the nuetral.theres somehtin up there . i would call in a pro on that one