Triplett 3388 Fox & Hound HotWire Live Wire Tone and Probe Wire Tracing Kit with Adjustable Sensitivity - Traces Wires from 0 ~ 250 VAC and up to 1000 ft,Black

Pretty fantastic tester compared to:(a) the price, in view of what my local supply shops were asking for similar Ideal and Fluke products (neither of which could do live circuits), and(b) my network cable tracer, which in the past has worked on AC wiring in a pinch, but doesn't have great rangeI used this unit to trace a ridiculously long bedroom circuit that had a mystery short. I traced something close to 200' of 15 gauge, including through a section of 18" concrete floor that has a 6-inch topping slab on 2 inches of foam insulation over it, and also through about 50' of 12 inch concrete wall, loaded with double rebar.Steering this probe requires a bit of patience, trial and error, and disconnecting a few junction boxes along the way. There's the potential for bleedover into parallel wires, and the signal will propagate through common neutrals (actually a good thing -- caught a few that shouldn't have been!), but with a little bit of attentive use it becomes pretty easy to figure out good from bad leads.As others have stated, NOT a good circuit breaker finder. It'll do in a pinch, but I recommend spending the few bucks on the dedicated tool if that's what you need.The live wire function works flawlessly, the tone generator is adequately loud and discernible, and I got much more use out of the continuity tester than I imagined, mainly because it was already connected to the wires, vs. disconnecting and clipping up my multimeter.So while this tracer doesn't work miracles and has a bit of a learning curve, it's really great at what it does, especially for the price. Wholehearted recommendation.

I've got what I call the "shot-gun". That one it the big one with the hand held wand, "looking' underground long distances for the wide range.the second one is the '22'. That one is the absolute wire in the panel. the extreme detail compared to the shotgun Blast, you might say.Well, this one...This one is the combo of what I explained.I still use those other two when the detail is extremely needed or the wide/deep range is needed but this one is not as wide range of 70ft underground at 700 ft away nor is it the absolute "22" accuracy of the sencond one explained.This is a great unit all around.Strongly recommend6 YEARS LATER....This guy still works like a champ!I am now retired but use it often enough to keep handy to grab easily and conveniently.It's a great piece of equipment for anyone who does any kind of electrical work as a pro or as I am now, an old retired guy who can't stop working on someone's electrical when needed!Battery life span is longer than a year in mine. I just replaced the 9V in the receiver of it even though it was still a good battery, being a couple years old at this point or even longer.Very reliable. A great tool for the sparky to find what he's looking for in the walls, the other side of the building or even underground at some level.I would make sure I had this if life started all over as a sparky again! It's something everyone needs in their life.

This product is easy to use and works exactly as intended. In other reviews it does mention that it picks up a lot of crosstalk and it can be hard to trace through existing power wires or other interference. And yes that is the case but it's no different than any other tracer I've ever used. Maybe I've just used cheap ones but it was not unexpected for me. It was very helpful and tracing wires through my walls in my new house to find out how everything was run.

1. You need two 9-volt batteries.2. Pay attention to the lock button (see instructions)3. Practice using the Fox and Hound in all of the possible configurations on known circuits. It will save you time when you can't see any cables.Unlike so many other testers, the flexible design of the Triplet Fox and Hound means you have to know the nuances in order to get the most out of it. I first saw a Fox and Hound used around 1960 to trace underground wires and pipes. I was fascinated, but I can remember the electricians and plumbers talking about how proud Triplet was of their tool. Also, only one of them knew how to use it. The others were clueless.It is still well made, and I expect years of service.Read the instructions--the operating instructions. The way RF works will surprise you even if you are a HAM. I had cables from two circuits running very neatly next to each other for about 7 feet, and the RF propagated from the circuit under test to the second circuit. Since it was all in the wall, it caused some confusion in the attic when I started looking down a cable that I was certain was a different circuit. Also, a magnetic contactless charging unit was plugged in to the circuit under test, and It put a signal on the cable for some distance back that completely obliterated the warble. Finding and unplugging it resolved the problem. There are also hints in the operations instructions about how to ground the tester for underground RF detection. Save yourself some time and read the instructions first.Also there are different testing modes, and the section on "finding the NULL" is highly useful.Lastly, on the Hot-Wire version of the Fox, note that the selector switch locks in the "OFF - Continuity" position and to move it one must press the tiny red button just above the switch to move it.I love this system. Just stay calm and think about what it is doing, then read the instructions again.