ELEGRP G1215CM G20CMR Patented Auto-Monitoring GFCI Replacement Plug Inline Assembly, Manual Reset 15 Amp Grounded 3 Wires 3-Prongs for Power Tools, Lawn Equipment etc, UL Listed, 1 Pack, Black

Why I reached for an inline GFCI

The GFCI head on my electric pressure washer finally quit, leaving me with a perfectly good motor that wouldn’t power on. Instead of replacing the machine, I swapped the failed head with the Elegrp inline GFCI. I also took the opportunity to wire a second one onto a short “safety whip” cord for use with circular saws and an air compressor. After several weekends of yard cleanup and shop projects—including wet conditions that would make any electrician nervous—the plug has held up well and behaved exactly the way I expect a safety device to behave: quietly, consistently, and without surprises.

What it is

The Elegrp inline GFCI is a 3-wire, 3-prong, 15-amp replacement plug assembly with manual reset, an LED power indicator, and a short pigtail. It’s UL/cUL listed, rated IP65 against water and dust, and includes surge/lightning protection to 6 kV. The standout spec is an auto-monitoring self-test every five seconds, far more frequent than the minimum required by code. In practical terms, that means the device is continuously checking its own health, and if it detects a problem, it won’t simply pass power through.

This is the updated, slightly more compact version of Elegrp’s earlier design. The kit includes two grommets to suit common cord sizes (14, 16, and 18 AWG) and the hardware you need for a secure, strain-relieved install.

Installation and setup

Installation is straightforward if you’re comfortable wiring plugs. Here’s how I approached it:

• I cut off the failed factory GFCI head, stripped back the jacket, and confirmed conductor colors: hot (black), neutral (white), and ground (green).
• I chose the right grommet for my cable diameter, slid it on first, and fed the cord into the housing. The included grommets fit 14–18 AWG; that’s perfect for most pressure washers, corded tools, and light extension cords. If you run 12 AWG cords for long runs or higher inrush tools, note this unit doesn’t ship a grommet for that size.
• Inside the housing, the terminals are clearly labeled. I tightened the connections, set the strain relief, and reassembled the housing with even screw tension to maintain the seal.
• After plugging in, I pressed Reset once (that’s necessary on first power-up) and verified operation with the built-in Test/Reset buttons. I also checked it with a plug-in GFCI tester; it tripped and reset reliably.

If you’re unsure about wiring or strain relief, ask an electrician. You want a solid mechanical clamp on the cord so that a tug at the cable doesn’t transfer to the terminals.

On the job

• Pressure washer: Start-up loads didn’t cause nuisance trips, and the straight-in plug shape fit my recessed outdoor outlet where the original right-angle head did not. I worked through overspray and damp conditions, and—assuming no real fault—there were zero unexpected trips. The LED made it easy to see at a glance whether the circuit was live after a reset.
• Circular saw and corded drill: These are classic culprits for nuisance trips on marginal GFCIs due to motor inrush. The Elegrp unit stayed solid. Pressing the Test button cut power instantly and Reset restored it with no fuss.
• Small air compressor: A 12-amp oil-less unit cycled without tripping the GFCI. That’s not a guarantee for every compressor—some have hefty startup surges—but it’s a good sign for general-purpose use.

I deliberately ran the plug in light rain under a covered porch to check real-world sealing. IP65 means water jets and dust resistance, not submersion, and it behaved as expected: no moisture ingress, no corrosion starting on the fasteners, and the housing wiped clean after.

Safety and design details that matter

• Frequent self-test: The five-second auto-monitoring inspires confidence. I never “felt” it operating—there’s no blinking or audible cue—but knowing it’s constantly checking reduces the temptation to skip manual testing. I still recommend pressing Test/Reset periodically out of habit.
• Manual reset: This is the correct choice for portable tools. If power drops and later returns, a manual-reset GFCI will not re-energize the load on its own. That’s safer on jobsites and around kids or pets. The trade-off is convenience—if your plug is tucked behind a cabinet, you’ll need to reach it after an outage.
• Water resistance: IP65 is legit for outdoor use in rain and washdown and exceeds the typical “3R” style drip protection. Still, don’t leave it sitting in a puddle or run it where it can be submerged.
• Surge protection: The 6 kV transient protection is a welcome layer against spikes and nearby lightning activity. It’s not a substitute for whole-house surge protection, but it adds resilience in the scenarios portable tools often see.
• UL/cUL listing: The markings are clear on the housing. That matters for inspections and, more importantly, for trust in how the trip algorithm and isolation are implemented.
• Size and ergonomics: The updated housing is tidy and easier to tuck at an outlet or hang from a cord hook. The short pigtail gives just enough flexibility to reduce stress at the receptacle without creating a tangle.

Limitations and caveats

• 15-amp, three-prong only: If you need 20-amp gear or locking connectors, this isn’t it. Keep loads appropriate for a 15A circuit and typical 14/16 AWG cords.
• No 12 AWG grommet: Many serious extension cords are 12 AWG. You can’t properly strain-relieve those with the supplied grommets. If your workflow relies on 12-gauge cords, you’ll want either an enclosure that supports that size or a different model.
• Manual reset is a plus for safety but a minus for remote applications: If you’re powering something tucked under a deck or behind landscaping, a trip or outage means a walk.
• Not submersible: IP65 will shrug off rain, sprays, and dust. It’s not designed to live in a bucket or sit in standing water.

One more practical note: modifying the cord on a listed tool can affect its warranty. I accepted that trade-off to keep working and maintain GFCI protection. If that’s a concern, consider using the Elegrp on a short “safety pigtail” cord that you plug your tool into, rather than rewiring the tool itself.

Who it’s for

• Owners of pressure washers, corded lawn tools, and portable power tools whose OEM GFCI heads have failed or are inconvenient (right-angle heads often don’t fit recessed outdoor outlets).
• DIYers and pros who want an inline, jobsite-friendly GFCI with a frequent self-test, manual reset, and real weather resistance.
• Campers or yard users who want an extra layer of protection on a standard extension cord when tapping power in damp environments.

If you’re primarily running 20A gear, using 12-gauge cords, or need auto-reset behavior for unattended loads, this particular unit isn’t the right fit.

Verdict

The Elegrp inline GFCI did exactly what I wanted: it restored safe operation to a good tool without adding headaches. Installation was clean thanks to the grommet options and clear terminal layout. In use, it resisted nuisance trips across a handful of motor loads, stayed dry in wet-weather work, and provided the right kind of human-factor safeguards—manual reset, clear LED, and constant self-checking—without getting in the way.

I recommend this tool for replacing failed GFCI heads on pressure washers and outdoor equipment, and for adding portable GFCI protection to corded tools. The combination of UL listing, IP65 sealing, frequent self-test, and sensible ergonomics earns my confidence. Just be mindful of the 15A rating and cord-size constraints, and you’ll have a reliable, safety-forward plug that should outlast the machine you put it on.