the white wire is sized different and does serve a different function than the ground wire. at the service (meter), they are connected to each other and to the ground rod/water pipe. the connection to the ground rod/pipe is a lower resistance than the wires in the house, therefore fault current will go to ground quickly and kick the breaker or blow the fuse. once they leave the service, the ground is there to take the fault current back to the ground; it is connected to the non-current carrying metal parts of your equipment, such as the frame of your stove. the neutral (white) takes the unused current back to the panel; during certain fault conditions, especially with 120-volt circuits where the neutral is broken, the back-feed from the other 120-volt wire can go back on the white wire. if it is connected the frame of your stove, you can easily be electrocuted if you touch the frame and another ungrounded component, such as your sink.
From: Seymour Dupa <grumpy_44134@yahoo.com>
To: "DoIt_Yourself@yahoogroups.com" <DoIt_Yourself@yahoogroups.com>
Sent: Thursday, September 22, 2011 9:30 PM
Subject: Re: [DIY] Re: 220 3 wire and 2 wire
So WHY can it not continue to serve both functions [other than some politician decides it shouldn't]?
The 'electricity' would continue to do the same thing it did before, wouldn't it?
A 120/240v range or dryer ALWAYS required a neutral. It was the ground that was allowed to be omitted. The neutral served both functions in an older "3-wire" setup.
--- In DoIt_Yourself@yahoogroups.com, "wired" <wiredformen@...> wrote:
>
> One more fact about ranges/cook tops and the white and bare (or green) wires. Before a few years ago, the green (bare) and white were put together and the male cap was 3 prong. Now they have to be separated and use a 4 prong cap (for those having a white (neutral) wire). Often the older appliances came with the two wires attached together.
>
> --- In DoIt_Yourself@yahoogroups.com, "hapennyherald" <hapennyherald@> wrote:
> >
> > Have something I am uncertain about. The wiring to a stove top is 3 wire + ground Has Black Red White and a smaller bare. The cook top has Black Red Green all insulated.
> >
> > My inclnation is Black to Black Red to Red and White to Green (since the white and ground are attached to the same bar in the panel) and attach the bare wire to the metal box ( since metal boxes have to be grounded.
> >
> > Also would you advise wiring an outlet or hardwiring?
> >
> > Thanks David
> >
>
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