Key facts
- Brand
- EXTECH
- Model
- CB10
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
Start here

Extech CB10 Circuit Breaker Finder and GFCI Receptacle Tester User Guide
The Extech CB10 is a handheld instrument designed to locate circuit breakers and test receptacle wiring and GFCI functionality. It consists of a transmitter and a receiver unit. The transmitter plugs into an outlet to inject a signal, while the receiver detects this signal to identify the controlling breaker or displays LED codes for wiring conditions.
Read onlineEXTECH CB10 specifications
| Operating Voltage | 90 to 120V |
|---|---|
| Operating Frequency | 47 to 63Hz |
| Power supply | 9V battery (receiver) |
| Operating Temperature | 41ºF to 104ºF (5ºC to 40ºC) |
| Weight | 5.9oz (167g) |
| Dimensions | 8.5” x 2.2” x 1.5” (215 x 56 x 38mm) |
| Operating Altitude | 7000ft. (2000meters) maximum |
Source: Extech CB10 Circuit Breaker Finder and GFCI Receptacle Tester User Guide
All EXTECH CB10 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What should I do before using the tester?
Always test the instrument on a known good circuit before use to ensure it is functioning correctly.
From: Extech CB10 Circuit Breaker Finder and GFCI Receptacle Tester User Guide
Does the tester indicate the quality of the ground connection?
No, the tester will not indicate the quality of the ground connection, two hot wires in a circuit, a combination of defects, or reversal of ground and neutral conductors.
From: Extech CB10 Circuit Breaker Finder and GFCI Receptacle Tester User Guide
What voltage range of circuit breakers can this device locate?
The device is designed to quickly locate circuit breakers operating at 110V to 125VAC.
From: Extech CB10 Circuit Breaker Finder/Receptacle Tester User Manual
What are the dimensions of the receiver unit?
The receiver measures 6.4x2.2x1.5 inches.
From: Extech CB10 Circuit Breaker Finder/Receptacle Tester User Manual
