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Electrical Wire and Cable

Circuit Requirements for a Dryer

How can I wire a 4wire 240volt dryer cable? How to Identify The Wiring Connections for Your Electric Clothes Dryer.


Wiring an Electric Clothes Dryer

Electrical Question: How can I wire a 4wire 240Volt dryer cable?

  1. So, to convert to a 240VAC supply, via a 4-wire cable, connector and receptacle, I assume the following is required:
    1. Remove the metal strip connecting the middle terminal to the adjacent grounding screw
    2. Reconnect the dryer-side green lead to the ground screw where the metal strip was previously connected prior to its removal
    3. Separate the black and red leads (currently connected to the same upper terminal), wiring one or the other to the lower terminal, where the green lead used to be connected.

Please advise your views ASAP. Thanks!

This electrical wiring question came from: John, a Homeowner from Parachute, Colorado

Dave’s Reply:
Thanks for your electrical wiring question John.

How to Wire a Dryer and Understand the Circuit Voltages

Application: Wiring Connections for an Electric Clothes Dryer.
Skill Level: Intermediate to Advanced – Best performed by a licensed electrician.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester or Continuity Tester.
Estimated Time: Depends on experience and level of problem solving skills.
Precaution: Testing live wires is dangerous and should be done by an experienced individual only. Additional testing using a continuity tester should only be made after the circuit has been identified and turned OFF and Tagged.

Understanding Equipment Labels and Circuit Voltage

When a dryer label states 120/240 this indicates that the device has both voltages present. In this case 240 volts is comprised of two lines consisting of 120 volts each and when testing Line-1 to Line-2 the voltage will be 240 volts, but when testing Line-1 to ground or neutral the reading will be 120 volts, and the same is true for line-2. Some clothes dryers have 120 volt controls, such as the timer, however the motor and heating elements are 240 volts.

This Dryer Question Specifically

More about Wiring a Dryer Cord

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