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The ECM INDUSTRIES LLC HGT6520 is a GFCI outlet tester designed for electricians and inspectors who need a fast, reliable way to verify proper wiring and ground fault circuit interrupter function at standard outlets. Using advanced proprietary circuitry, the HGT6520 detects low ground wire resistance below 10 ohms and provides a single LED readout that confirms correct wiring without requiring the user to interpret a dual-indicator chart. The high-impact ABS housing carries a 250-pound crush rating and is built to survive drops of up to 10 feet, making it a practical field tool for rough conditions.
The HGT6520 is suited for residential and light commercial electrical inspections, service calls, and new construction walk-throughs. It plugs directly into standard 120-volt outlets and includes a built-in GFCI test function for outlets wired in parallel, allowing the technician to trip downstream GFCI protection on a shared circuit. Electricians, home inspectors, and service contractors use this tester to identify miswired outlets, missing grounds, and failed GFCI devices quickly during inspection rounds.
Designed for use with standard 120-volt GFCI-protected outlets in residential and light commercial electrical systems.
This tester is installed and operated by licensed electricians or qualified inspectors. No tools or wiring work is required to use the tester — simply plug it into the outlet under test. Always confirm the circuit voltage matches the tester rating before use. Follow NEC guidelines when correcting any wiring faults identified by the device.
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