--- product_id: 5243939 title: "Extech CB10 AC Circuit Breaker Finder and GFCI Receptacle Tester" brand: "extech" price: "R1589" currency: ZAR in_stock: true reviews_count: 13 category: "Extech" url: https://www.desertcart.co.za/products/5243939-extech-cb10-ac-circuit-breaker-finder-and-gfci-receptacle-tester store_origin: ZA region: South Africa --- # Live circuit detection Two-pass pinpoint accuracy Integrated GFCI safety test Extech CB10 AC Circuit Breaker Finder and GFCI Receptacle Tester **Brand:** extech **Price:** R1589 **Availability:** ✅ In Stock ## Summary > ⚡ Master your electrical domain with pinpoint precision and safety! ## Quick Answers - **What is this?** Extech CB10 AC Circuit Breaker Finder and GFCI Receptacle Tester by extech - **How much does it cost?** R1589 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/5243939-extech-cb10-ac-circuit-breaker-finder-and-gfci-receptacle-tester) ## Best For - extech enthusiasts ## Why This Product - Trusted extech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Pro-Grade GFCI Testing:** Instantly detect wiring faults and trip GFCI outlets with a dedicated test button for ultimate safety assurance. - • **Custom Sensitivity Control:** Adjust receiver sensitivity to silence ghost chirps caused by electrical noise—perfect for complex setups. - • **Ready-To-Go Out of the Box:** Includes 9V battery and rugged transmitter/receiver set—start mapping your electrical system immediately. - • **Zero-Power Shutdown Hassle:** Locate breakers without flipping switches or cutting power—work smarter, not harder. - • **Precision Two-Pass Calibration:** Double-scan tech guarantees 100% accurate breaker ID, eliminating false signals in crowded panels. ## Overview The Extech CB10 AC Circuit Breaker Finder and GFCI Receptacle Tester is a dual-function tool designed for professionals and homeowners to quickly identify live breakers without power shutdown. Featuring two-pass calibration for unmatched accuracy, an integrated GFCI tester to detect wiring faults, and adjustable sensitivity to eliminate false signals, it ensures efficient and safe electrical diagnostics right out of the box. ## Description Product 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. Review: Easy to pinpoint the correct breaker. - 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. Review: Superb tool for solving basic home wiring issues - This has helped me unravel the mysteries of my house wiring. You plug the transmitter end into an outlet (three prong) and go hunting for the right breaker with the sniffer. You can buy adapters to plug into light sockets and even alligator clips to attach the transmitter to bare wires if you are feeling bold. The tool has a sensitivity knob on the sniffer. This is the part that you get a feel for when using the tool. If you have the sensitivity too high, it's difficult to identify the exact right breaker within the breaker panel. The trick is to lower the sensitivity while you are sniffing until it only beeps when you hover over a single breaker. Bear in mind there is a proper orientation indicated on the end of the sniffer. Now I have one of these, I wouldn't be without it. It's really useful and as you get better with it, you can use it for tracing wires and all sorts of things to get you out of a bind. Highly recommended. ## 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0014FNWJG | | Best Sellers Rank | #106,780 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #151 in Circuit Testers | | Brand | Extech | | Brand Name | Extech | | Color | Green, Red | | Compatible Devices | Simply plug the GFCI Transmitter into an outlet and trace for the correct breaker at the electrical box | | Customer Reviews | 4.4 out of 5 stars 2,610 Reviews | | Global Trade Identification Number | 00793950400104 | | Included Components | CB10 | | Item Dimensions | 10.1 x 5.4 x 1.5 inches | | Item Highlight | Locate breakers/fuses live, 110-125VAC, two-pass calibration, GFCI outlet test, 9V, transmitter/receiver | | Item Weight | 0.02 kg | | Item dimensions L x W x H | 10.1 x 5.4 x 1.5 inches | | Manufacturer | Extech | | Measurement Type | Voltmeter (for AC voltage) | | Minimum Operating Voltage | 110 volts_of_alternating_current | | Model | 1218G94EA | | Number of Items | 1 | | Part Number | 1218G94EA | | Power Source | Battery Powered | | Style | CB10 | | Style Name | CB10 | | UPC | 785533703542 793950400104 | | Unit Count | 1 Count | | Warranty Description | 1 Year | ## Product Details - **Brand:** Extech - **Color:** Green, Red - **Item Weight:** 0.02 kg - **Power Source:** Battery Powered - **Style:** CB10 ## Images ![Extech CB10 AC Circuit Breaker Finder and GFCI Receptacle Tester - Image 1](https://m.media-amazon.com/images/I/71vSvjsm6AL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Can you use this to trace the outlet to its circuit breaker if the circuit breaker is damaged or off?** A: Unfortunately it can't. The CB 10 used to locate breakers from a energized outlet. The device needed to find a open, or deenergized circuit will have a tone generator built in, these are more commonly called wire tracers.They are a little more expensive but well worth the cost. **Q: I have outlets wired in series: some NM. some metal-shielded. Can I detect signal in accessible wires "halfway" to the breaker to confirm route??** A: You should be able to trace wiring that is not in a shielded metal conduit. I submit however, that your outlets are not wired in series, they are in parallel and perhaps daisy chained, but they will not be in series, nothing will work if they are. Remember the old Christmas tree lights that if one was bad or missing they all went out? That was series wiring. **Q: Can this trace a wire routing through the wall.** A: In answer to the question, the CB10 can not be used to trace a wire behind walls. There are instruments out there that are designed specifically to trace the location of hidden wires but are extremely expensive. **Q: can it be used to test another outlet to see if it's using the same line/breaker?** A: Thank you for your most recent email inquiry. Model CB10 can be used to identify what breaker an outlet is on. Please contact us if you a have any further questions. Thanks. Best Regards, Westtown Products ## Customer Reviews ### ⭐⭐⭐⭐⭐ Easy to pinpoint the correct breaker. *by J***T on June 29, 2023* 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. ### ⭐⭐⭐⭐⭐ Superb tool for solving basic home wiring issues *by R***A on June 5, 2025* This has helped me unravel the mysteries of my house wiring. You plug the transmitter end into an outlet (three prong) and go hunting for the right breaker with the sniffer. You can buy adapters to plug into light sockets and even alligator clips to attach the transmitter to bare wires if you are feeling bold. The tool has a sensitivity knob on the sniffer. This is the part that you get a feel for when using the tool. If you have the sensitivity too high, it's difficult to identify the exact right breaker within the breaker panel. The trick is to lower the sensitivity while you are sniffing until it only beeps when you hover over a single breaker. Bear in mind there is a proper orientation indicated on the end of the sniffer. Now I have one of these, I wouldn't be without it. It's really useful and as you get better with it, you can use it for tracing wires and all sorts of things to get you out of a bind. Highly recommended. ### ⭐⭐⭐⭐ Works very well, but you have to fiddle with it a little to get it dialed in. *by L***G on April 6, 2023* I had no idea this kind of product existed until I was having trouble tracing circuits in my house. The house is midcentury, so not crazy old, but it has had some interesting wiring work done over the years. During those years nobody has apparently taken the time to accurately label the breaker boxes downstairs, so you can never tell what circuit anything is on. Normally this is frustrating, but not the end of the world, but recently was a much bigger problem. I got a MIG welder that I can use for hobby stuff, but it has to be on a 20AMP circuit instead of 15AMP. Normally this wouldn't be an issue, just double check it is on a 20AMP circuit and that the outlet is also rated 20AMP, but of course I couldn't tell which outlet was on which circuit. I didn't want to have to guess or start flipping breakers to see what turns off, so I looked online. I was originally just hoping for a test plug that could give me some sort of further information. I already have the ones that just tell you if the outlet is wired correctly. I was SO pumped when I found out this thing existed and wasn't crazy expensive. I couldn't wait for it to get here. I tried it out and I was able to quickly make sure the outlets, including GFI, were wired correctly (because the plug section also performs this function) and which circuit they were on. It saved so much time and messing around and gives me a great option for future situations that are similar. I have even already lent it to a couple of friends who didn't know this technology existed and were also very excited to make use of it. Using the tester can be a little delicate, but I did look at some other reviews that were helpful. Basically you start by plugging in the dongle to the outlet you want to find the breaker for, then you start sliding the handle along with the tip making contact along the center of each circuit breaker. Then you keep turning down the sensitivity until it only beeps on one breaker switch and that is the loop that the plug is attached to. When it gets the test signal from the plug, the handle frantically but rhythmically beeps. It takes a few tries to recognize it, but it is a distinct sound. The sensitivity adjustment has to happen every time you use it, as far as I can tell, but after the first time it is much easier because you know what to listen for. ## Frequently Bought Together - Extech - 1218G94EA - CB10 Circuit Breaker Finder, Locates fuses/Breakers, Tests receptacles and GFCI Circuits - Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles - Klein Tools NCVT1P Voltage Tester, Non-Contact Low Voltage Tester Pen, 50V to 1000V AC, Audible and Flashing LED Alarms, Pocket Clip --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/5243939-extech-cb10-ac-circuit-breaker-finder-and-gfci-receptacle-tester](https://www.desertcart.co.za/products/5243939-extech-cb10-ac-circuit-breaker-finder-and-gfci-receptacle-tester) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-10-07*