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Subject: This should be an easy question?

Date: 01/24/02 at 5:25 PM
Posted by: Mike
E-mail: vklacar@sprint.ca
Message Posted:

This not so much of an analog circuit qustion but rather one about home wiring. I don't know everyhing about electricity and electronics but I have recently become interested in how grounding systems work in homes. I have read the explanation and I understand that the green wire in an appliance is usually attached to the metal chasis, that way if the live wire (black) becomes free and touches the chasis the current will flow onto the chasis through the green wire and into earth ground, thereby tripping the breaker or fuse. What I find confusing is this, they say that the neutral ( white ) wire and the green wire are BOTH connected to earth ground. If so then why the need of the green wire at all and not just use the white wire to ground the metal chasis. I think I am missing something very simple here, however I can't put my finger on it. Thanks for the help.

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