The neutral wire carries electricity back away. It needs to be grounded to earth.
The ground wire - in a perfect world - is never used or needed. However _if_ it's needed, it might save your life or keep from burning something to the ground - or less dramaticly save your $29 electric drill from fizzing itself.
The ground wire needs to bleed electricity to earth, so it too needs to be bonded to earth.
Turns out a good place for both the neutral & the ground wires to bond to earth is in one location by the main panel. From this location, you should run seperate ground & neutral wires.
If the ground & nuetral ever get bonded together anyplace else - then it sets up odd loop (curcular) connections that don't fail properly. It sets up conditions where any electricity on the neutral wire _also_ now is carried by the ground wire. This makes all your bare metal everywhere possibly electrified....
Put it another way. You have 2 pipes running through your house, one is hot water and one is cold water.
Somewhere near the hot water heater the cold & hot water pipes are connected the cold water branches off, and the hot water branches into the heater & is the hot water side.
You can't say the hot & cold water lines are the same, so can tie them together anywhere I want to - you would have a mess of tepid water & no hot, no cold water....
Likewise, even tho the ground & neutral wire are bonded at one place (or should only be bonded at one place!) they are different from there on, and shouldn't be re-connected to each other later on. If you connect the hot & cold water lines together anywhere other than at the water heater, you end up failing the 2 sperate water lines and neither will work proper.
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Today's Featured Article - Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
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