Klein ToolsET300 Circuit Breaker Finder, Finds Electrical Circuit Breaker of 120V Standard Electrical Outlet

This tool is awesome. When I first moved into my house, I mapped out all the circuits. Years later, I had a major renovation and the contractor and electrician did a lousy job of not labeling anything on the circuit boxes.This tool takes care of that. I know a lot of people review these types of tracers and say they don't work. If you follow the directions carefully, this one works well.1. Plug in the transmitter to the outlet in question. The circuit must have power. the Transmitter has a red light when connected.2. Go to your circuit panel and turn on the Receiver. The breakers must be on.3. Slowly scan each breaker in the box. Ignore any beeps or lights of now.4. Hold power button on Receiver for a few seconds to shut it off.5. Power receiver back on.6. Scan the box again slowly, breaker by breaker.* I don't know that you HAVE to do Step 4/5. I found mine worked more accurately that way, but I also do have a main panel and a sub panel I was scanning so I wanted to boot the device cleanly after each use.NOTE: You should be holding the Receiver with one of the red arrows on the front (on each side of the word "Up") pointed up. You may have to turn it so the other arrow is pointed up as you switch sides on a box with two columns of breakers.Mine works accurately. I had a case of two where I had to touch a breaker again a couple of times to get a tone and the green arrow indicating that was the right breaker. I got NO false positives, which is the important part.FAQ:* It works on 90-120v, so if you are conventional 110v you can use this. it does NOT work on 220v.* You just scan the breakers; you do NOT need to remove the panel cover.* The Receiver comes with a 9v battery already installed.I highly recommend buying the Klein Tools 69411 accessory kit that includes a bulb socket to outlet adapter, and a female outlet to alligator clips adapter. These are handy when you want to trace a lighting fixture or wires as opposed to an outlet. If you need only the socket to outlet adapter you can buy one for much cheaper at Home Depot, etc. But if you want both adapters, this isn't a bad price.The only thing I don't like about it - I despise when manufacturers sell tools or gadgets that have multiple parts and then want to sell you a nylon bag to hold them for extra $$. But the product itself - 5 stars.

This is an AMAZING tool! I just returned the Sherry CS61200P for its inability to isolate the circuit AND giving way too many false positives (see my review on that tool).This tool (Klein ET300) is a simply, but highly effective tool.Before I discuss its use, let’s first look at the benefit that we are seeking with a circuit breaker finder: we want it to identify THE circuit breaker in question AND NOT identify ANY others (this is called a “false positive”). In short, with this type of tool, you are seeking CONFIDENCE. This tool delivers.Thistooldoes that 100% of the time and with ease. It bears repeating to list the instructions explicitly:1) Plug the “signaling device” into the desired outlet (you can also test lights and wires with adapters).2) Take the “finder” to your control panel.3) Starting atone row of breakers at the first one, slide the finder right behind the breaker’s handle with the finder PERPENDICULAR to the breakers.4) Slide it down that row and do the same for the other row(s).5) You are doing this for the finder to “learn” the panel. IGNORE any sounds during this part of the test.6) Then, do steps 3 & 4 AGAIN.7) During this “slide” the finder WILL locate the ONE breaker in question — with a beep and a large green arrow.8) If someone is helping you, ask them to watch the red light on the signaling device while you turn the circuit breaker off to confirm that it is the right breaker. It will be.The accuracy, the ability to not show false positives, the ease of use of this tool just blows me away. It is the FIRST time that I’ve ever used one of these tools with 100% confidence. It is that good!NOTE: My control panel is a Square D QO panel. I’m assuming that the tool will work similarly on other breakers & panels.Again, highly recommended, no reservations whatsoever, 100% satisfied.

A couple of recommendations:Remove all the plug in devices in your house before trying to chase down a circuit. A charger and a LED lamp were giving false indications. It is a pain to unplug everything but the instructions recommend doing it and it does help.Scanning takes a little finesse. I was scanning the wires coming in. It seems to work better scanning the breakers themselves away from the wires. If you scan the wires it will show indications on the adjacent circuits making it is hard to narrow down to the exact circuit. This was not covered in the instructions.After you learn how to use it, it works well enough but there is a learning curve.

It had good instructions for use . I like this circuit finder .

Our house was built in 1959. The circuits have never been mapped, so every time I need to do any work with the electricity, I have had to flip circuit breakers until finding the right one. The house was built when grounded circuits were required, but three prong outlets were not. So -- we have grounded circuits, but all outlets have only two prongs. Almost nothing comes with two prong plugs, anymore, so I'm always having to use adapters. I finally decided to replace all outlets with three prong outlets and flipping the circuit breakers excessively is apt to damage some of them. Every circuit I tested traced immediately and accurately. Plug in the sending unit, run the tracer over the breaker panel once for the device to map the board and then slowly run it down the board, again. The indicator lights and the device beeps at the correct circuit and you're done. I can't imagine more expensive ones working any better because this works perfectly.

This was something I needed for years. It’s great and works easily.

Excelente herramienta no se induce como otras Fácil deUsar

Lo primero, la idea es buenísima para localizar cualquier automático o paso por cajas de registro.Lo malo, las clavijas del enchufe es sistema americano, solucionable con un adaptador, lo verdaderamente malo para el sistema europeo es que el funcionamiento es para voltajes entre 90 y 120 V.C.A. lo que lo hace NO VALIDO para ESPAÑA

Es fácil de utilizar y cualquier persona lo puede uzar

The first time you use it, you are not too sure if it is reading the correct breakers, but after you use it a few times, you get the hang of how to align it with the breakers, and then it works like a charm. I am an electrician and have used several of these circuit-locating devices, and this one is the best that I have used in this price range. You can easily spend double the money on other units and get no better performance for the extra cost. The biggest downside, as others have mentioned, is that the location of the on button is poorly thought out - it is too easy to accidentally turn it on. I solved this by keeping the unit in a hard case rather than soft.