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The Klein Tools ET310 Circuit Breaker Finder with Integrated GFCI Outlet Tester is a digital circuit breaker finder used to locate the correct circuit breaker in a panel to which an electrical outlet or fixture is connected. The Transmitter is connected to the electrical outlet or fixture in the circuit while the receiver is used to scan the breakers in the circuit panel. The Transmitter also features a GFCI outlet tester. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn’t just the name of our company, it’s also our family name. And since we’re an American company that’s family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn’t just make great products, we make great products that stand up to the demands of the professionals who use them every day … Since 1857.
From the manufacturer
About Klein Tools
As an American manufacturer of hand tools for more than 160 years, Klein Tools makes premium-quality, professional-grade tools that deliver performance, durability and precision. Our team continues to put six generations of expertise into each tool by using the highest quality materials and superior workmanship.
Klein Tools doesn’t just make great products, we make great products that stand up to the demands of the professionals who use them every day … Since 1857.
AC Circuit Breaker Finder, Electric Tester and Voltage Tester with Integrated GFCI Outlet Tester
The Klein Tools ET310 Circuit Breaker Finder with Integrated GFCI Outlet Tester is a digital circuit breaker finder used to locate the correct circuit breaker in a panel to which an electrical outlet or fixture is connected. The Transmitter is connected to the electrical outlet or fixture in the circuit while the receiver is used to scan the breakers in the circuit panel. The Transmitter also features a GFCI outlet tester.
- This circuit breaker finder can quickly and accurately locate the correct circuit breaker in a panel corresponding to the circuit to which an electrical outlet or fixture is connected
- GFCI tester consists of two parts: a Transmitter connected to the electrical outlet or fixture, and a Receiver used to scan the panel to locate the correct breaker
- Receiver delivers clear visual and audible indications when the correct breaker has been located
- Operates on 90-120V AC circuits
- Transmitter incorporates a GFCI outlet tester to inspect the wiring condition at the electrical outlet and test GFCI devices
- Transmitter docks in the Receiver for convenient storage as a single item when tester is not is use
- Transmitter incorporates a three-pin plug for connecting to North-American-style grounded electrical outlets.
- The transmitter may be connected to other electrical fixtures using optional accessories which are sold separately (Cat. No. 69411)
FEATURES
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Circuit Breaker Finder locates the correct breaker in a panel |
Tester consists of two parts: a Transmitter and a Receiver |
GFCI Outlet Tester integrated in receiver |
Important information
Read, understand, and follow all warnings and instructions before operating testers.Before each use, verify tester operation by testing on a known live and correctly wired receptacle and circuit.DO NOT use if the tester appears damaged in any way. Always consult a qualified electrician to resolve wiring problems.Tester is intended for indoor use only. The tester is designed for use with 120V AC electrical systems. DO NOT connect to higher voltage electrical supplies.If using accessories to connect to bare wires ensure that the circuit is not energized before inspecting, applying, or removing the transmitter.Exercise extreme caution around energized, bare wires, especially when working in or around an open breaker panel.
120 volts
Remy McNamara –
The Klein Tools ET310 Circuit Breaker Finder is a game-changer for anyone who works with electrical systems. It’s reliable, easy to use, and takes the guesswork out of identifying circuit breakers.Build Quality:This tool feels solid in hand, as you’d expect from Klein Tools. The rugged design is built to withstand the typical wear and tear of electrical work, and the buttons and connectors are responsive and well-placed.Ease of Use:Using the ET310 couldn’t be simpler. Plug the transmitter into an outlet, and the receiver does the hard work of identifying the corresponding breaker. The receiver is intuitive, with clear lights and sound indicators that make it easy to pinpoint the right circuit.Accuracy:The tool’s accuracy is impressive. It quickly and reliably identifies the correct breaker, saving time and eliminating frustration. I’ve tested it in both residential and commercial settings, and it’s been spot-on every time.Additional Features:The built-in voltage tester is a great bonus. It adds an extra layer of safety, allowing you to confirm whether an outlet or circuit is live before starting work. The integrated GFCI testing function is also handy for verifying ground fault circuits.Portability:The ET310 is compact and lightweight, making it easy to carry around in a tool bag or pocket. The included case keeps it organized and protected when not in use.Value for Money:For the price, the Klein Tools ET310 offers excellent value. It combines multiple essential functions into one device, saving both time and money on electrical projects.Final Thoughts:The Klein Tools ET310 Circuit Breaker Finder is a reliable, well-designed tool that’s perfect for electricians, DIYers, or anyone who regularly works with electrical systems. It’s accurate, easy to use, and built to last—exactly what you need in a tool like this.Highly recommended for its functionality and convenience. It’s one of those tools you’ll wonder how you ever managed without.
Russ –
This has been one of the best tools I have ever bought. We bought an older home and I have been fixing or replacing receptacles and lights. It has worked on every item I had to fix. Highly recommended.
TreeFarmer –
I ordered this tester because it seemed like something that I should have in my “tool arsenal”. I tried it as soon as I got it so that I knew that it worked and so that I would know how to use it when I needed it.Circuit Breaker Finder – Worked like a charm! I plugged the “sending unit” into an outlet and then headed for the breaker panel. Using the tester I followed the directions and slowly passed it over all of the breakers once and then repeated it. As you get close to the right breaker – it will start to chirp a bit and when you are on it, you get the tone and the red light and the flashing green – can’t miss it! I then flipped that breaker and went back to the outlet I was testing and it was the correct breaker.Sending Unit/Outlet Tester – This is handy in that it shows you if the outlet is wired property (and it was) and I like the GFCI tester function. I tested several of the outlets in my kitchen that should be on a GFCI circuit and when tested, did trip the GFCI outlet that was controlling them.Everything works, it was easy to use, and it makes testing and working on your home/farm wiring really easy. 5 Stars and I would buy it again for sure.
Melissa Menchaca –
The circuit breaker finder works perfectly—accurate and easy to use. It quickly identifies breakers, saving time and effort. A must-have tool for any electrical troubleshooting.
Ronald Gross –
I encountered a problem with questionable breaker, so I purchased this tool. I tested it and found a couple of breakers had been mislabeled. I also found out that the breaker I had questions about (unfortuantely) is good while the line to 4 outlets is bad. I purchased another Klein tool that checks if a breaker is functioning okay, and it showed that the one I was concerned with was okay.This tool is worth having if you want to work on an electrical outlet on one side of your home and you need to find the associated breaker on the other side of the home, this is the tool for you. Unfortunately, it doesn’t work with light switches.
Kenny Ray –
This product is wonderful , saves a ton of time . We had a huge building we were trying to find what breaker ran what . This cut out lots of walking back and forth and loads of time ! Wish I would’ve had this years ago !!
Ryan K. –
Works wonderfully! Works best if you are comfortable enough taking the cover off the panel, so you can get close to the wires coming in.
Rodger P Hopp –
I tried this out as soon as I received it along with the recommended accessory kit. It was easy to use the first time and had clear indications as to the location of the correct circuit. No more throwing switches to find the related circuit breaker for any outlet. If you do any electrical problem solving in your home, you need to have this!
KIRO –
Saves time
Finding the right fuse or circuit breaker is often hard. This tool makes it very easy. Can do it alone and works on fuses and circuit breaker
Juan jose –
Funciona a la perfeccion
Todo ok