Klein Tools ET450 Advanced Underground Circuit Breaker Finder and Wire Tracer Kit for Energized and Non-Energized Breakers, Fuses, and Wires
$299.98
Price: $299.98
(as of Sep 25, 2025 00:32:19 UTC – Details)
The Klein Tools ET450 Advanced Circuit Tracer Kit is a professional tracer for energized and non-energized breakers, fuses, and wires. When the Transmitter is connected to a circuit, the Receiver’s sensitivity can easily be adjusted to detect the transmitted signal on breakers, fuses, and wire through drywall, cement block, and underground. Kit comes with transmitter, receiver, blade and ground prongs, alligator clips, 3-Foot and 20-Foot lead adapters, AC plug leads, instructions, all required batteries, and a hard carrying case with handle for convenient transportation and storage.
Is Discontinued By Manufacturer : No
Product Dimensions : 16.12 x 12.75 x 4 inches; 2 Pounds
Item model number : ET450
Batteries : 10 AA batteries required. (included)
Date First Available : April 7, 2022
Manufacturer : Klein Tools
ASIN : B09XG38XLP
Best Sellers Rank: #9,407 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #15 in Circuit Testers
Customer Reviews: 4.7 4.7 out of 5 stars 1,268 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
RELIABLE CIRCUIT TRACING: The Advanced Circuit Tracer Kit ensures dependable tracing of energized or non-energized breakers, fuses, and wires for accurate electrical identification
ADJUSTABLE SENSITIVITY: Easily modify receiver sensitivity to detect transmitted signals through various materials like drywall, cement block, or underground, enhancing tracing capabilities
VERSATILE APPLICATIONS: Trace wires, conduit, pipes, or isolate a single wire within a bundle, making it suitable for a wide range of electrical tracing tasks
SIGNAL STRENGTH INDICATION: Audible beep and visual indicators on the receiver provide clear signal strength feedback, aiding in precise wire identification
ILLUMINATION AND NCV FUNCTION: Receiver includes a built-in flashlight for low-light areas and a non-contact voltage (NCV) function to test wire energization, enhancing safety and visibility during tracing
AC/DC VOLTAGE INDICATORS: The transmitter features external voltage indicators (12V, 48V, 120V, 240V, and 480V), allowing for easy identification of different voltage levels during tracing
COMPLETE PACKAGE: The kit includes a transmitter, receiver, blade and ground prongs, alligator clips, 3-foot and 20-foot lead adapters, AC plug leads, batteries, instructions, and a sturdy carrying case for convenient storage and portability
Customers say
Customers find the circuit breaker finder works well on live circuits and appreciate its ability to trace wires, with one customer noting it can trace cables behind sheet rock. The tool is accurate, with one review mentioning clear readings up to 1000 feet, and customers consider it a valuable tool that saves time and money. While some customers find it simple to use, others say it’s not intuitive.
13 reviews for Klein Tools ET450 Advanced Underground Circuit Breaker Finder and Wire Tracer Kit for Energized and Non-Energized Breakers, Fuses, and Wires
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K. Whittemore –
Great test tool
I was told this thing would help me trace out power wires ⦠and it did! This is a complete kit to get the job done! It was easy to learn and had all the adapters I needed to do the job. It was a bit of money but well worth it.
Shea ray –
Fantastic tracer
Fantastic circuit tracer, I haven’t had the chance to use it to its full extent but I have found some crazy wiring and damage while troubleshooting so it’s without a doubt worth the money!
Rodney Adams –
Great product.
Great product.
Bill Pritchard –
Works great for tracking hidden wires through walls, floors, and underground
Works better than I expected for tracing wires through walls, floors, and even under a gravel drive. Following the instructions, I connected the ground lead of the transmitter to a good and certain ground; the one I used was several feet away from the unpowered type NM cable I wanted to trace. The transmitter red lead was clipped to one of the NM wires. The receiver traced the cable down the wall, underneath the floor for 50 feet, then up the wall to a junction box. It was necessary to adjust the sensitivity along the way, and I found it best to watch the numbers for best accuracy.The best thing was using the Klein ET450 the next day to trace an underground communication cable from a basement to an outbuilding about 60 feet away; we estimate that it is buried about 2 feet down. I was not expecting the ET450 to work, but wanted to give it a go. The same procedure was followed by connecting the transmitter to a solid ground a few feet away from the cable, and clipping the red lead to one of the wires in the bundle. Going outside with the receiver, it picked up the signal at a medium high sensitivity setting. Watching the numbers I could find the peak signal location within just a couple of inches and mark that. The whole path was traced to the outbuilding.The sound indication is good for giving a general indication of the wire you are locating, and the sensitivity level is necessary to be adjusted to narrow down the location to a few feet. Watching the numbers on the display will let you see very fine level changes to localize to a few inches.
Bruce Warrington –
Best of the reasonable cost options for tracing wires
Worked great – used it to trace a hot outlet back to the breaker panel, and had to turn the sensitivity down on the probe to narrow down the exact breaker, so it had more than enough signal on a short (maybe 75 foot) run in conduit. Tried it on unpowered data wires to label the other end of the correct cable. Worked great so far, but haven’t tried using to trace any power wiring underground yet. Very nice to have one tool that works for both finding un-powered data/signal/phone pairs, as well as plugging it right into powered outlets to find a breaker before even starting. The non-contact voltage sensing in the probe seems to work about as sensitive as my much smaller Fluke Volt-Alert pens do, but I’ve only tested this Klein probe on 120 VAC, not any lower voltage DC cabling yet where the Fluke pens still work. Very nice case to keep it all together and un-damaged in the tool bag or box, and I really like that they provided specific holders to put the batteries into, so you don’t have to store them in the device or leave them rolling around the box, so they won’t run down and leak if this doesn’t get put into use for some period of time.I didn’t need a lot of time in the manual, just checking over features and basic usage, and the buttons and screen display are fairly intuitive. You won’t need to refer to the manual much again, but it’s nice that it has a place inside the box for other users. If you’re tracing underground wires, you only need to pay attention to finding a neutral or ground wire that’s on a different circuit somewhere else before starting. If not, the signal path going both directions on a pair that are right next to each other are equal and opposite, and tend to cancel the signal strength enough that you may not find it. No problem with simple breaker locations though, and you can use the provided adapter to just plug the transmitter right into a standard outlet.On the down side, I really dislike that they required a screwdriver to open the battery covers. That’s just lazy design, and more prone to breakage, stripping, or screw loss than a decent spring clip just built right into the battery cover. And they made a VERY strange decision on the larger transmit unit, where all but two of the batteries snap into the removable battery holder that you screw back down onto the device – but then 2 more batteries need to be snapped into slots back inside the unit before you put the battery cover back on. Very uncommon, and easily missed by someone who will come back and tell you it doesn’t work, and you need to remember to ask if they had 2 extra batteries left over after putting them all in. If so, reopen the transmitter, and look for the extra 2 battery slots NOT near any of the rest of the batteries.All in all, a decent unit for the price, and it does double duty on hot and unpowered wires. I’ve paid more for just single use units. Definitely something worth adding to your tool set, that you’ll find many uses for.
Mariano Aleman –
Great for 120-480 volts home and industrial application
Really will save your live if you use it. I decided to get this because working in a dirty electric job. Good thing I did. The power I turned off wasn’t off because everything was changed and labeled wrong at breaker box. Figured it out and then charged for correct labeling of box.
Operandi –
Excellent
This device is one of the best tools I’ve ever purchased. I rarely write reviews
Bob P –
No regret purchase
Not cheap but works well. Often have to dial sensitivity way down to locate right breaker. It can take a bit of time to zero in on the correct one, but if you pay attention it works well.It also found a dodgy solder connection in a cable buried in conduit with pin point accuracy. Zero regret purchase.
Jimxxxx –
Excellent meter, re-wiring and older house, original home owner did modification that would have taken days to trace. Able to find and trace wires quickly and accurately.
Fernando M –
Excelente para buscar circuitos y lineas detras o bajo concreto, No decepciona, es algo que todo buen electricista deberÃa de tener entre sus herramientas, hace el paro cañon ahorrando mucho tiempo en encontrar lineas.
Diego –
Muy bueno lo he usado un par de veces y cumple con su función, en cables con y sin energÃa. Veamos que tal la duración de baterÃa, pero hasta ahora todo OK.
Chad Appel –
I love this tool! As an electrical contractor who needs to trace wiring and find circuits this has been a game changer! Good quality and easy to use, just read the instructions.
Gary –
This tool is a necessity for anyone working with electricity as it also works on live circuits. It will help you find hidden wires just about anywhere. One of the best cases was trying to find a ~20 year old buried cable outdoors where trees have grown up and the people that originally buried it must have been drunk because the line went in very odd multiple directions and power didnât come out the other end about 300â away. Turns out there was a buried splice in the ground about 1.5â down where someone had spliced the line (went somewhere else into the back 40 ð) only taped the connection (no marrets) and tried to encase it all in fiberglass ð I would never have found that without this tool.If you wanted to install lag bolts into a wall, the price of this tool for a one time use would be worth the cost to make sure a wire wasnât in the way or youâd instantly be into more money to fix it if you needed to call an electrician to install a new wire.