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

⚡Locate breakers live w/o power off

🎯Two-pass calibration for 100% accuracy

🛡️Integrated GFCI & wiring fault tester

R1823

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Description

⚡ Master your electrical domain with pinpoint accuracy and safety.

NOISE NO PROBLEM - Adjustable sensitivity dial filters out electrical noise for crystal-clear signals in crowded panels.
READY WHEN YOU ARE - Comes complete with 9V battery and rugged transmitter/receiver—start mapping circuits right out of the box.
WORK LIVE WORK SMART - Identify breakers without shutting off power, saving time and avoiding downtime.
PINPOINT WITH PRECISION - Two-pass calibration eliminates guesswork—find the exact breaker on your first scan.
SAFETY MEETS SIMPLICITY - Integrated GFCI tester detects 5 wiring faults plus a dedicated trip button for instant safety checks.

The Extech CB10 AC Circuit Breaker Finder and GFCI Receptacle Tester is a professional-grade, dual-function tool designed for quick, accurate circuit breaker identification without power shutdown. Featuring two-pass calibration technology, an integrated GFCI tester with multi-LED fault detection, and an adjustable sensitivity dial, it ensures reliable performance even in complex electrical panels. Compact and battery-powered, it’s ideal for electricians and homeowners seeking efficiency and safety in electrical diagnostics.

Specifications

ASIN	B0014FNWJG
Best Sellers Rank	#133,164 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #188 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 2,609 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

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R1823

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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