Extech CB10 Circuit Breaker Finder

Fits commercial and residential panel work where you need a two-piece AC breaker finder with GFCI receptacle testing on 110–125 VAC North American receptacle circuits.

Key advantages

Two-piece breaker finder — plug-in transmitter plus handheld receiver with adjustable sensitivity.
GFCI receptacle tester — wiring-fault LED legend and GFCI trip test on the transmitter.
110–125 VAC NA style — designed for North American receptacle circuits.
Audible/visual locate — receiver indicates the correct breaker in the panel.

Typical applications

Commercial and residential panel work locating unknown breakers.
Receptacle wiring-fault and GFCI trip checks.
Service kits for 110–125 VAC North American circuits.

Selection guide

Type — Extech CB10 AC circuit breaker finder with GFCI receptacle tester transmitter.
Receiver — Handheld receiver with adjustable sensitivity and audible/visual breaker indication.
Transmitter — Plug-in transmitter with GFCI test button and wiring-fault LED legend.
Voltage — For 110–125 VAC circuits (North American receptacle style).
Functions — Locates circuit breakers; checks receptacle wiring faults; GFCI trip test.

Common mistakes

Ordering for 230 V / non-North-American receptacles — listed for 110–125 VAC North American style.
Expecting a clamp-style tracer for live feeders without a receptacle — transmitter is plug-in.
Skipping sensitivity adjustment on multi-breaker panels — receiver has adjustable sensitivity.
Treating wiring-fault LEDs as a full megohm insulation test — legend is receptacle wiring/GFCI oriented.
Test & measurement instruments · Test & measurement buying guide
Request a Quote · Get selection help

When to RFQ / what to tell us

Confirm 110–125 VAC North American receptacle use (not 230 V export styles).
Need for GFCI trip test and wiring-fault legend vs breaker-locate only.
Quantity, ship-to, and whether receiver + transmitter kit must ship complete.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	24338
Brand	Extech
Model	CB10 Circuit Breaker Finder
Product type	circuitbreakerfinder
Type	Extech CB10 AC circuit breaker finder with GFCI receptacle tester transmitter
Receiver	Handheld receiver with adjustable sensitivity and audible/visual breaker indication
Transmitter	Plug-in transmitter with GFCI test button and wiring-fault LED legend
Voltage	For 110–125 VAC circuits (North American receptacle style)
Functions	Locates circuit breakers; checks receptacle wiring faults; GFCI trip test
Form factor	Two-piece kit: receiver + transmitter
Document	Extech CB10 datasheet + UM + OEM product PNG (extech.com/products/images/CB10.png)

Documents

Extech CB10 product page / documentation — request the current OEM PDF on RFQ (no direct public PDF URL stored for this SKU).

FAQ

Q: What voltage does CB10 support? A: 110–125 VAC North American receptacle style circuits per the published range.

Q: What is in the kit? A: Two-piece kit — handheld receiver plus plug-in transmitter with GFCI test and wiring-fault LED legend.

Q: What should I send for a quote? A: Voltage style confirmation, quantity, ship-to. Compatible with systems using Extech CB10 — we do not claim authorized-dealer status.

Parameter	Value
Approvals	UL listed; CE (per CB10-KIT family datasheet)
Voltage Range	110–125 VAC circuits (North American receptacle)
Functions	Locate breakers/fuses; test receptacle wiring (correct + six fault conditions); GFCI trip test
Indication	Receiver: audible + visual breaker indication; Transmitter: bright red/green LEDs for wiring status
Sensitivity	Variable sensitivity adjustment to pinpoint correct breaker
Receiver Size	6.4×2.2×1.5 in (162×55×38 mm); 4 oz (113 g)
Transmitter Size	3.25×1.75×1 in (83×44×25 mm); 1.6 oz (45 g)
Power	Receiver powered by 9 V battery (included); transmitter plug-in powered from outlet
Kit Contents	Receiver + GFCI transmitter + 9 V battery; pieces snap together for storage