Easily Trace/ Identify Unmarked Circuit Breakers in Seconds!

This video demonstrates how to use a Klein Tools ET310 circuit breaker finder to easily identify unmarked circuit breakers in a panel box. The tool utilizes a transmitter and receiver to help users locate the correct breaker for receptacles, light fixtures, or junction boxes, making it safer and easier than manually testing circuits. The device can also be used to identify the circuit breaker controlling light fixtures and junction boxes, particularly helpful when working with wiring in attics or other hard-to-reach areas.

Circuit Breaker Finder

• 00:00:30 The Klein Tools ET310 circuit breaker finder consists of a transmitter and receiver to locate unmarked breakers. It works with arc-fault, GFCI, and conventional breakers but not double-pole 240-volt breakers. An optional kit for an additional $5 allows for the identification of light fixtures and junction boxes by utilizing specific adapters.

Using the Receiver

• 00:01:30 The receiver plugs into a receptacle, and the transmitter is used to scan across the breaker box. The initial scan is the ‘learning phase’ and a second scan is the ‘testing phase’ where the correct breaker is identified by the tool. The tool utilizes beeping and lights to indicate the breaker related to the outlet.

Dual Purpose Breakers

• 00:02:38 The tool is not intended for ‘dual purpose’ breakers that are also AFCI or GFCI as there is a possibility of tripping the breaker during the process. Most breakers are not dual purpose, and manual tripping is discouraged unless specifically required for testing or troubleshooting.

Identifying Light Fixtures

• 00:03:04 A light fixture adapter is needed to connect the receiver to a light socket. The user should ensure power is restored to the circuit before attempting to identify the corresponding breaker. The same 'learning' and 'testing' phases apply as with outlet identification.

Junction Box Identification

• 00:03:56 A junction box adapter is used to identify the breaker related to a junction box. The adapter has black and red wires that connect to the hot and neutral wires in the junction box. It is important to ensure the safety of the user when working with live wires. This process also follows the same ‘learning’ and ‘testing’ phases as described for other applications.