Can you use this to trace the outlet to its circuit breaker if the circuit breaker is damaged or off?

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.

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??

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.

Can this trace a wire routing through the wall.

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.

can it be used to test another outlet to see if it's using the same line/breaker?

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

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Extech CB10 AC Circuit Breaker Finder and GFCI Receptacle Tester

Extech CB10 AC Circuit Breaker Finder and GFCI Receptacle Tester

Product ID: 5243939

Details

Brand
Extech
Color
Green Red
Item Weight
0.02 kg
Power Source
Battery
Style
CB10

⚡Pinpoints breakers w/o power off

🎯Two-pass calibration for 100% accuracy

🔋Ready out-of-box with 9V battery

¥14830

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Master your breakers like a pro—no more guesswork, just precision.

DUAL SCAN CALIBRATION - Two-pass sensitivity tuning eliminates false signals for pinpoint accuracy in crowded panels.
COMPACT READY TO USE - Ergonomic design with included 9V battery means you’re set to map your electrical system immediately.
MANUAL SENSITIVITY CONTROL - Adjust signal detection to cut through electrical noise and trace even complex wiring paths with confidence.
PRECISION CIRCUIT TARGETING - Locate the exact breaker or fuse without flipping switches—save time and avoid guesswork.
INTEGRATED GFCI SAFETY CHECK - Test outlets for wiring faults and trip GFCI breakers with a dedicated button—professional-grade safety audit.

The Extech CB10 AC Circuit Breaker Finder and Receptacle Tester is a professional-grade diagnostic tool designed for both home and industrial use. It features a two-pass calibration system for precise breaker identification without power interruption, an integrated GFCI tester to detect wiring faults, and a manual sensitivity dial to eliminate false signals. Ready to use out of the box with a 9V battery, this compact device streamlines electrical troubleshooting and safety testing, making it an essential tool for electricians and savvy homeowners alike.

Specifications

ASIN	B0014FNWJG
Best Sellers Rank	#262,569 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #361 in Circuit Testers
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 4.4 out of 5 stars (2,604)
Global Trade Identification Number	00793950400104
Included Components	CB10
Item Dimensions	10.1 x 5.4 x 1.5 inches
Item Weight	0.02 kg
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 Name	CB10
UPC	785533703542 793950400104
Unit Count	1 Count
Warranty Description	1 Year

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TrustScore 4.5 | 7,300+ reviews

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¥14830

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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