# Testing a 240 Volt Dryer Circuit

 The voltage readings at my dryer plug are not right, what should I do? How to Test a 240 Volt Dryer Circuit.

### How To Hook Up a Generator to the House Panel Using a Circuit Breaker Interlock Kit For Backup Power

NOTE: A List of All my Helpful Videos
Will Display at the End of This Video
Check out my YouTube Channel, and Subscribe!

## See All My Videos Here!

with my online Video Course:
Basic Home Electrical Wiring by Example

Electric Dryer Circuit
[ad#block]Electrical Question: The voltage readings at my dryer plug are not right, what should I do?

• We just moved to a new house and needed to install a 4 prong cord to our existing dryer. I’m only pulling 125 volts from the lead and neutral wire. I have 2 questions regarding this issue.
1. There is no physical ground in the plug itself. Would this have any effect on the voltage coming through to the dryer itself?
2. Could the breaker box itself be configured incorrectly? If so, how can this be corrected?

This electrical wiring question came from: Philip, a Homeowner from Phoenix, Arizona.

Thanks for your electrical testing question Philip.

## How to Test a 240 VoltĀ  Dryer Circuit

Application: Testing a 240Volt Electric Dryer Circuit.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrician.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with hand tools and electrical troubleshooting skills.
Precaution: Identify the circuit, turn it OFF and then Tag it with a Note before making inspections or wiring modifications.
Note: Electrical troubleshooting is best performed by a qualified electrical contractor

### Testing the Voltage of a Dryer Receptacle

• 240Volt Dryer
• A 240 volt dryer circuit is basically two circuits of 120 volts that come from the two separate 120 volt power sources at the main electrical panel.
• Voltage Test and Voltage Readings
• When using a tester to check the voltage, it is normal to have 120 readings from each power circuit leg to ground or neutral, but the reading between the two lines of power will be 240 volts.
• Dryer Circuit Breaker
• If any of these readings are not correct then circuit readings should be taken at the panel supplying the circuit.

#### More about Electrical Wiring for a Dryer Circuit

• Electrical Wiring Protection using Circuit Breakers
• A guide to home electrical circuit breakers and how they work to protect your electrical wiring.
• When properly installed, your home electrical wiring is protected by a circuit protection device.
• Wiring a Dryer
• See an electric dryer installation with a typical 220 Volt electric power cord wiring system.
• You may find yourself with either a 3-wire or 4-wire electric dryer, or a 3-wire or 4-wire outlet.
• Lets look a how the electric dryer is wired and what to do if your cord does not match the plug.

220 Volt Wiring Diagram

• Wiring 220 Volt Electrical Outlet
• Home electrical wiring includes 110 volt outlets and 220 volt outlets and receptacles which are common place in every home. See how electrical outlets for the home are wired.

The following may also be helpful for you:

### Wire a GFCI Outlet without a Ground Wire

NOTE: A List of All my Helpful Videos
Will Display at the End of This Video
Check out my YouTube Channel, and Subscribe!

## See All My Videos Here!

with my online Video Course:
Basic Home Electrical Wiring by Example

## Dave's Guide to Home Electrical Wiring:

» You Can Avoid Costly Mistakes! «

Here's How to Do It:
Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.

## Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handy Women, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.

Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

## The Safest Way to Test Electrical Devices and Identify Electric Wires!

The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.

## The Quickest Way to Check for Faulty Electrical Wiring!

The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.

## Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!

The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..

The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.

 More articles about 240 Volt Dryer Circuit, Electric Wiring and Home Electrical Wiring: « Previous Next » Real Estate Agents and Home Electrical Inspections Troubleshooting Problems with Electrical Outlets

2 Responses to “Testing a 240 Volt Dryer Circuit”
1. Skip says:

Electric Dryer Voltage Problem
Trouble shooting my clothes dryer …

In checking to see if I have power, I used a digital volt meter.

Hot leg 1 to Hot leg 2 reads 239V

Hot leg 1 to neutral reads 96 V

Hot leg 2 to neutral reads 143 V

any thoughts

2. Dave Rongey says:

Checking Dryer Voltage
Hi Skip,
Make all the Voltage Tests to the Ground Wire for the most revealing results.
Typically, with abnormal Dryer Circuit Problems there may be a fault with either the neutral, or one of the hot legs.
A higher than normal Voltage Reading on one leg is usually an indication that there is a Voltage Feedback which takes place through the Electric Heating Elements of the dryer.

Key points to check for Dryer Circuit Problems:
Dryer Circuit Breaker, including connections to the panel, the Dryer Receptacle, and the Dryer Cord.

I hope this helps,
Dave