The Klein Tools RT390 is a Circuit Analyzer that tests the wiring conditions at an electrical outlet, displays AC line voltage, inspects AFCI and GFCI devices with time to trip device, and performs voltage drop tests at 12A, 15A and 20A current loads. Results are easy to understand with large, color LCD. The tester is designed for use with North American 120V AC 3-wire electrical outlets.
Effortlessly test common outlets for common wiring faults, voltage and voltage drop tests
Correct wiring tests are “dummy-proof” with clear message
All test results are shown plainly on large, color LCD screen
Detect and identify common wiring faults in standard, AFCI and GFCI electrical outlets
Detects dual (open neutral/open ground) wiring faults
Inspect AFCI and GFCI devices; includes trip time and trip current
12A, 15A, and 20A load testing to measure percentage voltage drops
Powers off automatically after 5 minutes of inactivity to conserve battery life
Detachable cord for easy storage
For use with North American 120V AC 3-wire electrical outlets
Safety Rating: CAT III 135V
Klein Tools is the result of one of those “happy accidents” that turn out to be revolutionary. Klein Tools famously got their start in 1857 when a linesman came to founder Matthias Klein to repair his broken pliers. Klein replaced the broken half and when the old half of the tool broke too, Klein forged a replacement for that, thus making the first Klein Linesman pliers. Since these humble beginnings, Klein Tools has grown and become one of the largest American made toolmakers and they’re a brand used by tradesmen, linesman and electricians all across America.