DonTx Posted October 1, 2004 Report Share Posted October 1, 2004 Does the NEC require the use of 4 prong 220V outlets for dryers or are the old 3 prong still allowed in new construction? Donald Quote Link to comment Share on other sites More sharing options...
Richard Moore Posted October 1, 2004 Report Share Posted October 1, 2004 Donald... If I'm reading my NEC right... 250.140 New installations (circuits/outlets) for Cord-and-Plug-Connected equipment must comply with 250.138 250.138, basically, requires an equipment grounding conductor to be run with the power carrying conductors. That would be 4-wire/4-prong for a dryer. So, no, I don't believe you can have a 3-prong dryer (or range) outlet in a new home. Quote Link to comment Share on other sites More sharing options...
Steve Knight Posted October 1, 2004 Report Share Posted October 1, 2004 Donald, I agree with Richard. New construction requires a 4 wire/4 prong dryer connection. If buyer has been using dryer at a previous house it may have the wrong pigtail and the pigtail might need to be changed for use in a new home. Quote Link to comment Share on other sites More sharing options...
DonTx Posted October 1, 2004 Author Report Share Posted October 1, 2004 Thanks everyone, that's what I needed. Donald Quote Link to comment Share on other sites More sharing options...
hausdok Posted October 1, 2004 Report Share Posted October 1, 2004 Hi Donald, I don't know if this will help. It is from an 8-year old edition of Wiring Simplified by H.P. Richter and W.C. Schwan and is based on the 1996 NEC. From Chapter 14 - Wiring of Heavy Appliances, Page 116. Clothes Dryers: An electric dryer is a 120/240-volt appliance. Wire it as you would a range. The 1996 Code, in Section 250-60, now requires a 3-pole, 4-wire grounding type 30-amp receptacle as shown at K of Fig. 14-1, and a 4-wire pigtail cord similar to that used for a range but with smaller wires.The 1993 and earlier Codes, in Section 250-60, permitted the frame of the dryer to be grounded to the neutral of the three wires provided it was not smaller than No. 10. Service-entrance cable with a bare neutral was permitted where it ran from the service location directly to the dryer receptacle. The plug and receptacle serve as the disconnecting means. ONE TEAM - ONE FIGHT!!! Mike Quote Link to comment Share on other sites More sharing options...
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