Extech AC Circuit Breaker Finder/Receptacle Tester

Extech AC Circuit Breaker Finder/Receptacle Tester


The Extech AC Circuit Breaker Finder/Receptacle Tester locates circuit breakers and tests receptacle wiring.


  • Audible and visual circuit breaker indication
  • Tests reversed/open connections
  • Variable Sensitivity adjustment to pinpoint correct circuit breaker
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The Extech AC Circuit Breaker Finder/Receptacle Tester quickly locates 110V to 125VAC circuit breakers and fuses. The variable sensitivity adjustment is used to pinpoint correct circuit breakers. Bright red and green LED lights indicate if the receptacle is correctly wired or six fault conditions. To test, simply plug the GFCI transmitter into an outlet and trace for the correct breaker at the electrical box.  The transmitter tests for reversed or open connections. 


Applications include locating branch circuit breakers without flipping breakers to other circuits, confirming proper wiring during electrical wiring installation or repair, and testing receptacle ground fault operation. The transmitter and receiver conveniently snap together for easy storage.

Notable Specifications:
  • Dimensions (receiver):  6.4x2.2x1.5" (162x55x38)
  • Weight (receiver): 4oz (113g)
  • Dimensions (transmitter): 3.25x1.75x1" (83x44x25mm)
  • Weight (transmitter): 1.6oz (45g)
What's Included:
  • (1) Receiver
  • (1) GFCI Transmitter
  • (1) 9V Battery for reliever
Image Part # Product Description Price Stock Order
Extech AC Circuit Breaker Finder/Receptacle Tester CB10 AC circuit breaker finder/receptacle tester
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Extech AC Circuit Breaker Finder/Receptacle Tester Reviews

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Questions & Answers

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Is there any way to use the Extech AC tester in the Europe 220V AC system?
No, this circuit breaker finder has an operating voltage of 90 to 120 V and is only intended for use with 110 to 125 VAC circuit breakers and fuses.

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