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Electrical Wire and Cable


Installing a Electric Water Heater Circuit

How to Wire an Electric Water Heater Circuit: We are installing the wiring for an electric water heater circuit and we need to make sure we are using the right wire size.


Wiring a Water Heater
Electrical Question: We are installing the wiring for an electric water heater circuit and we need to make sure we are using the right wire size.

My questions about my Water Heater Project are:

This will be inspected, and we are working under a permit.

Thank you!

This electrical wiring question came from: Cheri, a Homeowner from Wichita, Kansas.

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

How to Wire a Water Heater Circuit

electric water heater

Application: Wiring a 240Volt Electric Water Heater.
Skill Level: Intermediate to Advanced – Best installed by a Licensed Electrical Contractor. Work in electrical panels is not recommended for homeowners, non-experienced individuals or non-electricians.
Tools Required: Basic Electricians Pouch Hand Tools, electric drill, auger bits and extension cord as needed depending on the scope of the project.
Estimated Time: Depends on personal level experience, ability to work with tools and install 240 volt electrical circuit wiring.
Precaution: Identify the main circuit of the panel, turn it OFF and Tag it with a Note before working with the wiring or installing the 240 volt wiring and circuit breaker.
Notice: Installing an additional 240 volt circuit should be done according to local and national electrical codes with a permit and be inspected.

Electric Water Heater Circuit

The following is an example of installing an electrical circuit for a 240 volt electric water heater in a home:

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Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.


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Complete Guide to Home Electrical Wiring

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

Electrical Tips to Help You Wire it Right

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.

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FAQs Frequently Asked Questions and Comments

2 Responses to “Installing a Electric Water Heater Circuit”
  1. A.J. says:

    Water Heater Connection
    Do water heaters need to be hard wired or can they have a cord and plug connection?

    • Dave Rongey says:

      Water Heater Wiring
      Hi AJ,
      Most full size residential Water Heaters are hard wired, however, Smaller Waters that only require a 120volt circuit may come with a cord which is commonly used to plug into a 120volt receptacle outlet.
      I hope this helps,
      Dave

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