Electrical Wiring in the Home/baseboard heater


Have 240/208 volt heater 750/546watt baseboard heater. Can I hook that up with 14/2 and can I use a single pole 15 amp breaker or do I need a double pole 15amp

Robert Wilber
Licensed Philadelphia Electrician
Philadelphia License # 3516 - 16765
Electricity is dangerous!
You can be injured or killed!
Improper installations can cause fire, injury and death!
Are you qualified to do this work?
National Electrical Code definition, NFPA 70 2008 Article 100: Qualified Person. "One who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to recognize and avoid the hazards involved."
Electricity is fire in a box!
Always check with the local “Authority Having Jurisdiction” for an official interpretation before making installation decisions.
In Philadelphia, it is unlawful for anyone except an individual licensed by the City of Philadelphia to install electrical equipment and wiring.
Homeowners are not allowed to install wiring.
The owner of any property wherein any such installation is discovered shall be issued a violation by the Department of Licenses and Inspections.
The limited exceptions include replacing devices and fixtures at existing outlets.
Contact the Department of Licenses and Inspections for more information.
You are more likely to be killed by 120 volts than any other voltage [120 volts creates the PERFECT fatal current through the human body's electrical resistance!]
This information is provided for the use of parties as they see fit!
I am not responsible for the application of this information by any party, including those lacking sufficient skill or knowledge to perform these steps safely and any hazard created is the SOLE responsibility of the user.
The phrasing of your question suggests you lack sufficient knowledge to be doing what you plan.
That being said:
In a common residential environment, the standard voltage is 120 volts from any breaker to neutral. If you use a single pole breaker, you will provide 120 volts to the heater. Pure resistance units do not care what voltage you apply. The resultant heat produced is a product of the resistance of the heater, so at 120 volts you will generate 375 watts of heat. To create 750 watts output it is required to apply 240 volts. This requires a 2-pole breaker.
The current at 240 volts for a 750 watt heater is about 3+ amps. As it is considered a continuous use device, the ampacity of the conductor would be required to be 125% of the load current, or about 4 amps. The ampacity of 14 gauge wire is 15 amps, so it would be allowed to carry 12 amps current continuously (four hours or more).

Bear in mind that there are standard installation practices for any equipment, involving the use of specific techniques and materials.  
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Electrical Wiring in the Home

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Robert Wilber


Licensed Philadelphia electrician serving Delaware, Chester, Montgomery and Philadelphia County in Pennsylvania. I install and repair residential, commercial and industrial wiring and lighting. Troubleshooting and repair of problems that stump other people is my favorite. I am willing to help people figure out why things don`t work. I understand motor controls, transformers and machine wiring. I do not teach basics to novices or do free design work.


Experience in the area I have 44 years experience in residential, commercial and industrial electrical construction and repair, 480 volts and below. This is not to be confused with one week repeated two thousand times.

44 years experience in residential, commercial and industrial electrical construction and repair

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