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Converting 220v 4-wire outlet to 3-wire

Asked May 15, 2009, 02:51 PM — 2 Answers
I bought a new drier with the "inverted V" 3-wire power plug. The drier outlet I have is like an overgrown version of a 110 grounded outlet, with 2 vertical 110 prongs and a ground socket. I bought a V-socket to accommodate the new drier plug, but when I shut off the breaker and opened up the old socket, I found red and black hot wires, and apparently a bare AND a white ground wire. My question: Do I need to hook BOTH the white and bare wires to the ground terminal, or just ignore the white wire altogether?

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stanfortyman's Avatar
stanfortyman Posts: 4,885, Reputation: 1326
Electrical & Lighting Expert
  
#2

May 16, 2009, 06:18 AM


Well first off that plug and receptacle you had was wrong for a dryer, unless it was a true 240v like a European model. The receptacle you had was a straight 240v-30A version.

You should replace the receptacle with a 4-wire dryer receptacle and get the matching cord for your dryer.
The dryer does not come with a cord from the factory, you put the proper cord on it. So whoever put that three prong cord on it assumed it was correct.
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ohb0b's Avatar
ohb0b Posts: 215, Reputation: 65
Full Member
  
#3

May 16, 2009, 09:34 AM
Also, when you connect the dryer to a 4-wire receptacle, remember to remove the bonding jumper from the ground to the neutral.
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