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Baseboard Electric Heater Circuit Wiring

Can I Put More Than One Set of Baseboard Heaters on the Same Circuit Breaker? How to Install a Baseboard Heater, Electrical Circuit Wiring.

Home Electrical Wiring Video

Hooking Up a Generator to the House Panel
Using a Circuit Breaker Interlock Kit
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Install Wiring for a Baseboard Heater
Electrical Question: Can I Put More Than One Set of Baseboard Heaters on the Same Circuit Breaker?

I am Installing 240Volt Baseboard Heaters in my Home.

This electrical wiring question came from: Mark, a Electrician from Richmond, Virginia.

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

Install a Baseboard Heater Circuit

Application: Wiring a Baseboard Heater.
Skill Level: Intermediate to Advanced. This electrical wiring project is best performed by a Licensed Electrical Contractor.
Tools Required: Basic Electricians Pouch Hand Tools, electric drill,  auger bits and extension cord.
Estimated Time: Depends on personal level experience, ability to work with tools and install electrical circuit wiring.
Notice: Installing an additional baseboard heater circuit should be done according to local and national electrical codes with a permit and be inspected.

How to Install a Baseboard Heater Electric Circuit

Please keep in mind that the manufacturers circuit specifications are the ultimate guide due to the UL Listing.

More about Installing and Wiring a Baseboard Heater

How to Wire a Baseboard Heater
baseboard heater
This baseboard electric heater wiring information with photos and instructions will show you the direct steps to correctly wiring a baseboard wall heater.

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.

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Electrical Wiring
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Home electrical wiring projects with pictures and wiring diagrams.

This link is helpful as a Electrician
Electrical Code Articles

The following may also be helpful for you:

Dave's Guide to Home Electrical Wiring:

» You Can Avoid Costly Mistakes! «

Wire It Right with the help of my Illustrated Wiring Book
Great for any Home Wiring Project.
  electrical wiring  

Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handy Women, and Electricians
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
Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.

Learn more about Home Electrical Wiring
with my Online Video Course:
Basic Home Electrical Wiring by Example

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

10 Responses to “Baseboard Electric Heater Circuit Wiring”
  1. Steve says:

    Can you run the maximum wattage through a line voltage thermostat, or does it need to be 20% less than is listed. For example, can I use a 15 amp thermostat that is rated for 3600 watts, and run 3500 watts through it? Thanks

  2. Dave Rongey says:

    Steve, if the thermostat is specifically rated for 3600 watts then that should be ok. Check the manufacturers specs and if that is their rating then your good to go within the limits of that UL approved rating.

  3. Ken says:

    Does electric heat unit or thermostat in a bathroom need to be GFI protected? It would be installed next to a toilet bowl and 18″ from a shower.. Thank You

  4. Panel Heating says:

    Electric Heaters are very necessary in our daily life and now a day’s these are really cheap and comes with latest technologies.
    This is one of the best way for heating in our properties.

  5. Nate says:

    I have a baseboard heater ready to be hooked up in a bedroom. I had a contracter run the wiring and the room has been plastered since. My question is, the main power wire coming directly from the panel comes to the heater. Then from there, there is another wire ran to the thermostat location across the room. It is a 240 volt, 750 watt, 3.1 amp heater all ran with 12-2 wire. Wiring diagrams on both the heater and thermostat are very vague at best. How can I hook this up to work properly? Do i need a double pole thermostat and breaker? According to the heater booklet all it says is a 15 amp breaker. Thanks!

  6. Dave Rongey says:

    Hi Nate,
    To be precise I would need to know the Make and Model Number of the baseboard heater. Typical baseboard heaters are 120 or 240 volt, requiring a 1-pole or 2-pole circuit breaker respectively. The 12/2 circuit cable that has been installed may be used for either 120 or 240 volt, and a 15 or 20 amp circuit breaker may be used as specified in the instructions with the wiring in in the panel and to the circuit breaker configured accordingly. If the baseboard heater is 240 volt then a 2-pole thermostat is typically required, however the actual heater you have may have a slightly different type of control. Many baseboard heaters will either have a built in thermostat located at one end of the heater or a remote wall thermostat may be installed with the appropriate wiring as specified.

  7. elmer says:

    I have electric heat in one bathroom. I ran a 12 wire to another small bath out of the same wall box of the thermostat in first bathroom. Both heaters are only 3′. The first wall thermostat is wired with the whites tied together, and the blacks are separate. How do I connect the 12 wire to feed the other bathroom to a thermostat on the heater. Do I split the wire in box?

  8. Dave Rongey says:

    Hi Elmer,
    An electrical circuit may only be shared with more than one heater if the circuit is dedicated and the circuit capacity will support an additional wall heater. Additionally, each wall heater that is located in separate rooms must be controlled by individual thermostats that are located in each room. There are several types of wall heaters and thermostats that are available with specific installation requirements, therefore please refer to the installation manual for the specific wall heater that you have.
    I hope this helps,

  9. bob ledlow says:

    Does the NEC Code specify any max height for baseboard heaters? Generally the units can be installed on the floor or just above the base board trim. I can’t install under my windows and on the north wall because I have pipes that prevent me from making a floor level installation. How high from the floor can I install the unit?

  10. Dave Rongey says:

    Hi Bob,
    I haven’t seen a specific NEC Code concerning the height of a baseboard heater. The main concern is that the area is clear of flammable materials, such as drapes, sofa couches etc.. One advantage to installing a baseboard heater closer to the floor would be the natural convection process of heating the cooler air at the floor level, however the convection process will still heat the space if the unit is mounted higher.
    One thought would be to fir out away from the pipes with framing materials that are wrapped with sheet rock, just an idea.
    I hope this helps,