Electrical Wiring for a 240 Volt Wall Heater
How is a 240 volt heater wired to a thermostat? How to Install Electrical Wiring for a 240 Volt Heater.
Electrical Circuit and Connections for a 240 Volt Wall Heater
Electrical Question: I am trying install a 240 volt wall heater with a built-in fan to a thermostat.
- The heater has two red wires.
- The breaker is a double so I assume I need to connect white and black (12-2 wire)to the two poles on the breaker and the copper to the ground screws on the panel.
- Where should I position the thermostat in the circuit?
This electrical wiring question came from: Chris, a Homeowner from Vancouver, British Columbia.
Thanks for your electrical wiring question Chris.
How to Wire a 240 Volt Wall Heater
Application: Wiring a 240 volt Wall Heater.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrician.
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.
Precaution: Identify the panel circuit, turn it OFF and Tag it with a Note before working with the wiring.
Notice: Installing additional circuit wiring should be done according to local and national electrical codes, with a permit and be inspected.
Example of Wiring a Wall Heater
- Chris, from the information you have provided I can suggest that you pay careful attention to the installation manual that came with your heater.
- Typically a 240 volt heater will have three wires in a junction box or connection area.
- A dedicated circuit containing 3 wires, two will be the 240 volt lines and one will be the ground wire.
- The circuit size is determined by the required electrical load of the heater which is measured in watts or amps.
- It is extremely important that the new dedicated circuit is sized correctly.
- There are typically two types of thermostats
- A thermostat that is mounted directly on the heater, located at either end
- Or a thermostat that is located on the wall of the same room where the heater is being installed
- Thermostats will either involve the same size and type of wiring as the electrical circuit requirements or some thermostats are the low voltage type where a control circuit is contained inside the electric heater unit.
- Consult the heater installation manual for specific electrical circuit sizing and installation instructions.
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