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If you have a 240V hookup with a red black and white wire can you drive a copper rod into the ground and hook up the green wire to that?
Wiki User
∙ 8y ago
You could, but if you're going to do that then why not ground the entire service entrance panel? ...and you need to drive (if I remember correctly)...about 7 feet into the ground to be effective.
Wiki User
∙ 8y ago
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Does rebarb work for ground rod?
No the re-bar will rust in the ground when exposed to the ground dampness. This will cause the rod ground resistance to gradually increase. Approved ground rods are either copper clad or galvanized. In locations where it is impossible to drive a 10 foot rod into the ground the electrical code has approved ground plates that can be dug in and buried at two feet in depth. You want the resistance to be as low as possible on a grounding circuit. Alternatively, if that re-bar is part of the concrete foundation (Ufer ground) of the structure (and at least 20 feet long, 1/2" min. diameter) it is a perfectly acceptable grounding electrode. [NEC 250.52A3]
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A four blade dryer plug cord should have a red, black, white, and green wire in the cord set. The red and black wires are the ones that deliver the 240 volts to the dryer. Black and white deliver control 120 volts to the dryer and also drive the motor to turn the dryer drum. On some dryers they use the red and white for the motor and black and white for the control. As for the green it is always the ground wire.
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Which is better when grounding electrical equipment copperclad or copper?
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Unless otherwise specified you need a 5/8th inch by 8 foot copper clad rod. A great trick is to drive it in at a 45 degree angle and bend it up as you go so it ends up straight after it drive in all the way. This keeps you from hitting hard pan and keeps you from having to get on a ladder to drive the rid which can be kinda dangerous. Leave about 4 inches out of the ground for you ground clamp. For a 200 amp service use #4 armored ground. For 125 amp or 100 amp you can use #6 armored ground wire and an armored ground clamp. The NEC allows that for ANY connection to ground rod, #6 solid copper is the largest conductor required. The ground rod is SUPPLEMENTAL, and only in rare circumstances is the ground rod your primary ground. The sizes given above are for your primary grounding connection, such as a metal water line.
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