Dryer connection

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willjeff

New member
How to wire a four wire receptacle to a three wire dryer? I have been reviewing the 2002 code and cannot find the proper way. I have been told several different ways that do not seem correct. Please help so that I can give my students the proper answer.

Bill
 
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luke warmwater

Senior Member
Re: Dryer connection

Which came first? The 4wire receptacle or the 3wire range?

Since there is a 4wire receptacle installed, you will have to change the 3wire cord on the range to a 4wire cord.
Then you will have to remove the bonding jumper from the neutral to the frame inside the dryer.

This should be in the owner's manual of the range.
 
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jeff43222

Senior Member
Location
Minneapolis, Minnesota
Re: Dryer connection

I agree with Luke, with one caveat. I don't have a code reference, but I'm pretty sure the rules are that NEW three-wire 240V dryer receptacles cannot be installed anymore; they can only be replaced if they already exist. If you need to plug in your 240V dryer and don't have a receptacle for it, you have to put in a four-wire receptacle and change the cord on the dryer.
 
charlie

charlie

Senior Member
Location
Indianapolis
Re: Dryer connection

250.140 Frames of Ranges and Clothes Dryers.This section shall apply to existing branch-circuit installations only. New branch-circuit installations shall comply with 250.134 and 250.138. Frames of electric ranges, wall-mounted ovens, counter-mounted cooking units, clothes dryers, and outlet or junction boxes that are part of the circuit for these appliances shall be grounded in the manner specified by 250.134 or 250.138; or, except for mobile homes and recreational vehicles, shall be permitted to be grounded to the grounded circuit conductor if all the following conditions are met.
(1) The supply circuit is 120/240-volt, single-phase, 3-wire; or 208Y/120-volt derived from a 3-phase, 4-wire, wye-connected system.
(2) The grounded conductor is not smaller than 10 AWG copper or 8 AWG aluminum.
(3) The grounded conductor is insulated, or the grounded conductor is uninsulated and part of a Type SE service-entrance cable and the branch circuit originates at the service equipment.
(4) Grounding contacts of receptacles furnished as part of the equipment are bonded to the equipment.
 
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