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Old 12-07-2009, 12:25 AM   #1
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I have a three-prong dryer plug to wire up my electric bk, but am unsure as to how to determine which wire is for the ground prong. I assume it is the center of the three wires running into the plug (looks like this l l l ) and the two outer wires go to L1 and L2. But 220v and assuming is bad in my book... so how do I verify this? I have a multimeter if that would help me somehow.

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Old 12-07-2009, 12:35 AM   #2

Green = ground, red = hot, black = negative, and if it has a white, that's neutral.
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Old 12-07-2009, 12:51 AM   #3
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The 3-prong cord is composed of three gray wires. They are not color coded.
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Old 12-07-2009, 12:56 AM   #4
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Yes, the center of the three bonded wires is the ground. When I say bonded, I am talking about the fact that they are stuck together. A multi meter set to conductivity will confirm this. One lead on the bare wire and the other lead on the prong.

 
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Old 12-07-2009, 12:57 AM   #5
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Brilliant! Thanks Greenmonti... it has been a long day. I just need to clear the cobwebs, but thanks for doing that and pointing out the multimeter thing!
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Old 12-07-2009, 01:21 AM   #6
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Quote:
Originally Posted by cyberbackpacker View Post
Brilliant! Thanks Greenmonti... it has been a long day. I just need to clear the cobwebs, but thanks for doing that and pointing out the multimeter thing!

Your welcome. Hope all goes well.

 
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Old 12-07-2009, 01:57 AM   #7

Quote:
Originally Posted by cyberbackpacker View Post
The 3-prong cord is composed of three gray wires. They are not color coded.
This is odd. Are you sure the wire aren't covered by a gray insulation? I've never seen a dryer cord that's not color coded.
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Old 12-07-2009, 03:05 AM   #8
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Quote:
Originally Posted by Suthrncomfrt1884 View Post
This is odd. Are you sure the wire aren't covered by a gray insulation? I've never seen a dryer cord that's not color coded.
His pin config is different then in this pic, but this is what I imagine he has.
http://www.google.com/products/catal...677&sa=title#p

 
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Old 12-07-2009, 03:26 AM   #9
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Using a meter you figure this out. Set it to measure resistance and measure from the prong to the wire ends. When you read 0 ohms then you found the wire connected to that prong.

The round post is ground, the skinny blade is 110, the wide blade is neutral.

NM... thought you were talking 110.

The ground prong is the middle bottom one. the L1 and L2 should be shaped like / and \ .
The ground pin may also have a 90 degree angle in it
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Old 12-07-2009, 03:58 AM   #10
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Quote:
Originally Posted by Suthrncomfrt1884 View Post
Green = ground, red = hot, black = negative, and if it has a white, that's neutral.
WTF! This advice will get someone hurt or a big arc and fireball with a tripped breaker at best. You working with a DC circuit here?
In my world as a 30 year state licensed union wireman, red and black the hots on a 240 volt AC circuit, green your ground, white the neutral. Three wire is old crap you should use a 4 wire system.
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