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Extech

Extech CB10 AC Circuit Breaker Finder and GFCI Receptacle Tester

  • Based on 2,609 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Oct 16
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Style: CB10


Features

  • PRECISION BREAKER IDENTIFICATION: Quickly and accurately locate the correct circuit breaker or fuse without turning off power. Ideal for labeling residential or industrial electrical panels.
  • TWO-PASS CALIBRATION TECHNOLOGY: To ensure 100% accuracy, scan all breakers once to calibrate sensitivity, then scan a second time to pinpoint the specific circuit. (Prevents "incorrect" or "multiple" breaker signals).
  • INTEGRATED GFCI TESTER: The transmitter acts as a professional-grade outlet tester. It detects common wiring faults (Open Ground, Open Neutral, Reverse Polarity) and includes a dedicated GFCI trip button to test safety outlets.
  • SENSITIVITY ADJUSTMENT: Features a variable sensitivity dial on the receiver, allowing you to fine-tune the signal to eliminate "ghost" chirps caused by electrical noise in crowded panels.
  • READY OUT OF THE BOX: Includes a 9V battery and a rugged receiver/transmitter set. Pro-Tip: If the unit does not beep, ensure the 9V battery is snapped firmly into the terminal clips and the battery cover is locked.

Description

The Extech CB10 is the ultimate time-saver for homeowners and electricians alike. This 2-in-1 diagnostic tool eliminates the frustration of flipping every switch in your breaker box just to find one specific circuit. Simply plug the transmitter into your target outlet and run the receiver over the panel. The audible and visual alerts, combined with a manual adjustable sensitivity dial, ensure you find the right breaker or fuse on the first try, even in high-density panels where automatic testers often fail. Beyond locating breakers, the CB10 acts as a comprehensive safety auditor for your home. The integrated receptacle tester features a dedicated GFCI test button and a multi-LED display that identifies correctly wired outlets and five different fault conditions: open ground, open neutral, open hot, hot/ground reverse, and hot/neutral reverse. Whether you are troubleshooting a dead outlet, installing new light fixtures, or performing a professional home inspection, the CB10 provides the reliable accuracy you need to work with confidence. The compact, ergonomic design allows the transmitter and receiver to snap together for easy storage, and the package comes complete with a 9V battery, so you can start mapping your electrical system immediately. From the Manufacturer Locates the correct circuit breaker or fuse without turning off the power. Simply plug the transmitter into an outlet and trace for the correct breaker at the electrical box. Transmitter also verifies wiring and tests GFCI operation. Bright red and green LEDs indicate if receptacle is correctly wired or will indicate which of the 5 fault conditions exists. Convenient storage position for transmitter/receptacle tester. Complete with Receiver, GFCI Transmitter, and 9V battery.

Brand: Extech


Power Source: Battery Powered


Style: CB10


Color: Green, Red


Item Weight: 0.02 kg


Power Source: Battery Powered


Minimum Operating Voltage: 110 volts_of_alternating_current


Measurement Type: Voltmeter (for AC voltage)


Compatible Devices: Simply plug the GFCI Transmitter into an outlet and trace for the correct breaker at the electrical box


Style Name: CB10


Color: Green, Red


Item Weight: 0.02 kg


Item Dimensions: 10.1 x 5.4 x 1.5 inches


Brand Name: Extech


Model: 1218G94EA


Unit Count: 1 Count


UPC: 785533703542 793950400104


Number of Items: 1


Item Highlight: Locate breakers/fuses live, 110-125VAC, two-pass calibration, GFCI outlet test, 9V, transmitter/receiver


Warranty Description: 1 Year


Manufacturer: Extech


Global Trade Identification Number: 04


Included Components: CB10


Part Number: 1218G94EA


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Oct 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Works well and reliable
Style: CB10
Very effective tool, I use it on almost every repair call. It made me look like a pro when I labeled all the sub panels for a commercial warehousing customer of mine who berths hundreds of food trucks boats and RV's. When they need to know where a breaker is in one of their 9 panels they can find it because they are all labeled now at the receptacles. It works for two and three leg circuits without neutral legs better than I thought it would. I used alligator clip jumper wires and pins to connect the plug to the various twist lock and range receptacles that the food trucks plug into for the night. It is a little hazardous to have open hot wires using alligator clips, but it works safely and well well with a little caution and a vigilant helper. I am very happy. I have also used it to locate GFI feeds and test GFCI receptacles. It is a good tool and a great price. It is not a hard core unit in the long run, but it is not crummy cheap either. I am a professional repair contractor and although I am not destructively hard, am very hard on my gear in normal use, electrical work is a rough discipline. I drop things a lot, and I use it up, burn it out, and play it as productive as possible. I have no problem with the fact that a saws-all lasts me about a year during rough in work. The tool makes its money several times over. The plug-in on the breaker locator broke when I was testing a GFCI. The ground prong came out of the plastic body. The prongs are good thick stainless steel but it needs a larger chamfer ring to hold it into the plastic, at least the ground prong anyways. I absent minded threw both the plug and receiver away immediately on the job site with some other debris and wire clippings. I looked closely at the body of the plug and hastily decided not to try to open it and fix it. I figured I would just buy another one. Now I wish I had saved it and looked closer later. I have a entry level quality toner kit also and love it. I have dropped it twice and opened it and fixed the antenna cartridge and the speaker twice. I can not see the point in spending over 100 bucks on instruments that are gonna get beat up, or stolen anyways. This is an excellent tool whether you are a home-owner or a professional. The seller gets it out quick and with good packaging. If I am more careful with the plug I am sure it will not break again. ... show more
Reviewed in the United States on August 7, 2015 by Shawn
    • works great
Style: CB10
Found every circuit that wasn't marked.
Reviewed in the United States on October 30, 2023 by Thomas S.
    • Easily found the right circuit breaker
Style: CB10
This device works better than I expected..... The secret weapon is the adjustable sensitivity setting.... I give it a 5 for ease of use and near consistent accuracy.... The downside is the on/off, sensitivity combo switch... The switch works well but is not very sturdy. Reminds me of a on/off volume control on a 20th century 5 dollar transistor radio... If you buy it, treat it with care. ... show more
Reviewed in the United States on November 19, 2023 by joe
    • Incredible little tool
Style: CB10
This amazing little tool takes out all the screaming and hollering back and forth, is it off yet? Yes? No? and so on. Very Cool!
Reviewed in the United States on January 3, 2024 by David O.
    • Easy to pinpoint the correct breaker.
Style: CB10
Our panel labels are no longer accurate following a partial remodel a few years ago, and a service- and panel-upgrade last year. I need to replace an outlet without accidentally shutting down our computers, and the Extech 1218G94EA CB10 Circuit Breaker Finder made it easy to locate the right breaker without shutting anything off first. I've read the reviews of other breaker-finders and their users' difficulty pin-pointing the one correct breaker out of the several (or many) the tool identified. This tool has a sensitivity dial allowing you to manually decrease the sensitivity until it only responds to one breaker as you scan the panel. Since it does not try to adjust itself automatically, you get to tweak the sensitivity up and down until you're confident you've found the right breaker before you shut anythnig off. When you do shut off the breaker you identified, the signal disappears completely, even at full sensitivity, as a confirmation. When you go back to the outlet, the transmitter lights will be off as a second confirmation that the circuit is dead. This is a two-piece tool: A transmitter (which is also a wiring-fault tester and GFCI-protection tester) that you plug into the outlet whose breaker you need to identify; and a receiver/scanning tool that you pass over the breakers on your panel and which beeps and flashes when it finds the transmitter's signal. The transmitter comes with a cheap 9v battery which probably won't last long, and which will likely eventually leak and damage the tool. I'm using mine (hey, I had to try out my new toy!) but I'm going replace it with a high quality battery Alkaline battery very soon. I'd call this a home handyman-/handymaam-level tool for its less rugged construction than what a pro would need and expect, and it's priced to match. No stars off for that - it's the right tool for the market it serves. A pro tool would probably include adapters for a light socket and a set of jumper wires, which I didn't want or need right now. If and when I do, those are hardware store items. ... show more
Reviewed in the United States on June 29, 2023 by JRobert
    • Functions
Style: CB10
It's a quite a bit bulkier than most devices of a similar function. The wires for the 9v batter can interfere with the volume wheel by getting stuck between the wheel and the outer shell. It's strange there is no divider between these to area's. Furthermore, If a house is on a battery back up it seems to stop there and not at the breaker. ... show more
Reviewed in the United States on October 22, 2023 by McRae
    • Good detector
Style: CB10
The sensitive adjustable is a plus, I tested at my main breaker panel, It worked and informed me correct breaker.
Reviewed in the United States on December 24, 2023 by Simple Man

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