How to Install a Whole House Humidifier Circuit

What kind of circuit breaker should I install for a humidifier? Installing a dedicated circuit for a Whole House Humidifier. © By: Dave Rongey

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Wiring a Whole House Humidifier
Electrical Question: I plan on installing a Whole House Humidifier.

• I have a dedicated 12-2 wire running from my service panel to the furnace room where the humidifier is to be installed.

Dave’s Reply:

Thanks for your electrical wiring question Paul.

Install a Whole House Humidifier

Application: Install a Whole House Humidifier Circuit.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrical Contractor, or Licensed HVAC Contractor.
Electrical Tools Required: Basic Electricians Pouch Hand Tools, Voltage Tester, and appropriate Safety Gear.
Estimated Time: Depends on the personal level experience, ability to work with tools, install electrical circuit wiring, and the available access to the project area.
Electrical Safety: Identify the electrical power source to the Humidifier, turn it OFF and Tag with a Note before working with the electrical wiring.
Electrical Wiring Parts and Materials: Electrical parts and materials for the Humidifier should be approved for the specific project and compliant with local and national electrical codes.
Electrical Codes and Inspections: Installing or changing home electrical wiring should be done according to local and national electrical codes as adopted in your area of Pennsylvania. A permit and inspections may also be required.

Installing a New Circuit for a Humidifier in a Basement

This electrical wiring project is about Installing New  Circuit Wiring for a Humidifier in the Basement of a Home.

Installing a Circuit for a Whole House Humidifier

• Paul, from the information you have provided, an arc fault beaker is typically not required on a dedicated circuit for a specific 220volt device such as the whole house humidifier, however GFCI protection is required.
• An arc fault circuit breaker is typically used on circuits for accessible devices such as receptacle outlets in bedrooms.

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