How to Test a Circuit Breaker Using a Digital Multimeter?

Steps to Test a Circuit Breaker with a Multimeter

• Turn Off Power

As a safety precaution, turn off the power to the circuit and wear safety gloves. Your safety should always be a priority when dealing with electrical components.

• Locate the Circuit Breaker

Use a screwdriver to loosen the bolts that hold the electrical panel cover in place. You may need an extra set of hands to help you hold the cover steady while you loosen the bolts. Be careful not to drop the cover or touch any parts inside the panel.

• Set the Multimeter

Move the digital multimeter dial to AC voltage. For a standard residential circuit, choose a voltage range higher than 120 volts—this is the standard household voltage in the U.S.

• Test the Circuit Breaker

Place one probe of the multimeter on the screw terminal of the circuit breaker and the other probe on the ground screw. A functional circuit breaker should read close to 120 volts when it is on. If the reading is significantly below this value, it means the circuit breaker is faulty. Double-check the results to be sure about the readings. Get in touch with a professional electrician for repairs. Do not attempt to fix the breaker yourself.

• Reset the Circuit Break

If the circuit breaker is in good working order, flip the switch to the “on” position and turn on the power.

Call Mr. Electric for Professional Help

Remember, the licensed electricians at Mr. Electric are here to help if you encounter any difficulties or if you find that the breaker is faulty. Our team is committed to helping you keep your electrical system in good shape and maintain optimal safety.