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Yellow handheld tester with three-prong plug on 10in flexible cord and indicator lights

Klein Tools RT310 Outlet Tester AFCI GFCI 120V 10in Cord

SKU CH-NCS9-WPHYP

Tests standard, AFCI and GFCI outlets for wiring faults with a 10-inch flexible cord and clear visual indicators

  • Team affiliation1 Piece
  • Key features3 × 1.5 V AAA Alkaline Batteries, ETL, Battery Powered, true
  • Overall height18.53 L x 2.37 W x 1.28 H inches
  • Overall width18.53 L x 2.37 W x 1.28 H inches
  • Overall length18.53 L x 2.37 W x 1.28 H inches
  • Product weight8.5 oz
  • Detects common wiring faults in standard AFCI and GFCI outlets
  • Simulates arc fault conditions to test AFCI device operation
  • Simulates ground fault conditions to verify GFCI functionality
  • Identifies dual-open faults with simultaneous open neutral and ground
  • 10-inch flexible cord reaches outlets in difficult-to-access locations

Outlet Tester for AFCI and GFCI Circuits

The Klein Tools RT310 checks wiring condition at North American 120V AC outlets and evaluates both arc-fault and ground-fault protection devices. It is built for electricians, inspectors and maintenance technicians who need to verify receptacle safety on job sites or during service calls. The tester plugs directly into standard three-pin grounded outlets to reveal common faults.

Fault Detection and Visual Indication

The unit identifies the most frequent wiring errors in standard, AFCI and GFCI receptacles, including a dual-open condition with simultaneous open neutral and open ground. Patented technology enables this detection while clear indicator lights show the exact wiring state at a glance. The tester simulates arc and ground faults to confirm that protective devices trip as intended.

Corded Design for Hard-to-Reach Outlets

A 10-inch flexible cord moves the test head away from the plug body, letting the tool reach outlets blocked by furniture, cabinets or tight enclosures. Power comes from three 1.5V AAA alkaline batteries housed in the hand-held portion. The compact 18.53 x 2.37 x 1.28 inch form factor weighs 8.5 ounces and carries ETL certification for North American use.

How it compares

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Price $59.99
Pricier than about 82% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameKLEIN TOOLS, Klein Tools
Product typeVoltmeter
Size & build
Overall height18.53 L x 2.37 W x 1.28 H inches
Overall width18.53 L x 2.37 W x 1.28 H inches
Overall length18.53 L x 2.37 W x 1.28 H inches
Product weight8.5 oz
More details
Team affiliation1 Piece

Questions about this item

Will the RT310 work with the older standard outlets still in my house?

Yes, it tests North American 120V grounded outlets including standard, AFCI and GFCI types.

How do I confirm the RT310 is testing correctly after I plug it in?

The tester gives a clear visual indication of the wiring condition and simulates arc fault and ground fault conditions to verify AFCI and GFCI devices.

Does the RT310 come with batteries or do I need to buy them separately?

It includes three 1.5V AAA alkaline batteries so it is ready to use out of the box.

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