When you shop for a replacement GFCI plug, you'll see two versions: auto-reset and manual-reset. They look almost identical and offer the same shock protection. The only difference is what happens after the GFCI trips, but that difference matters a lot depending on what you're plugging in.
What's the same
Both types:
- Monitor the current flowing through the cord and cut power within milliseconds if they detect a ground fault of roughly 4–6 mA
- Have TEST and RESET buttons
- Stay tripped as long as a real ground fault is present
Auto-reset doesn't mean the GFCI ignores faults. If current is leaking to ground, an auto-reset plug stays off just like a manual one.
What's different
Manual reset
After any trip, or after a power outage, the plug stays OFF until a person presses RESET. Nothing restarts on its own.
Auto reset
After a power interruption or a trip whose cause has cleared, the plug restores power by itself. If the fault is still there, it stays tripped.
The simple rule
If someone is holding it, choose manual. If it runs on its own, choose auto.
Choose manual reset for:
- Pressure washers
- Saws, grinders, drills and other power tools
- Wet/dry vacuums
- Anything where an unexpected restart could hurt someone
Picture this: the power blinks while you're changing a pressure washer nozzle or a saw blade. With auto-reset, the tool could come back on in your hands. With manual reset, it waits for you.
👉 Kaper 15A Manual-Reset GFCI Replacement Plug
Choose auto reset for:
- Above-ground pool pumps
- Hot tub and spa pumps (120V plug-in models)
- Pond pumps and fountains
- Sump or transfer pumps that run unattended
- Anything on a timer
For these, the bigger risk is the equipment sitting dead after a short power outage. Nobody notices until the pool turns green or the pond fish are struggling. Auto-reset brings it back without anyone having to go outside and press a button.
👉 Kaper 15A Auto-Reset GFCI Replacement Plug
Side-by-side comparison
| Manual reset | Auto reset | |
|---|---|---|
| After a power outage | Stays off until you press RESET | Turns back on by itself |
| After a ground fault | Stays off | Stays off while the fault is present |
| Unexpected restarts | Never | Possible after a power blip |
| Best for | Hand-held tools, pressure washers | Pumps and unattended equipment |
What if I don't want to wire anything?
Both of the plugs above replace the plug on an existing cord, which takes a screwdriver and a few minutes. If you'd rather not cut a cord at all, a plug-in GFCI extension cord adds protection between the wall and your equipment.
👉 Kaper 3 ft GFCI Extension Cord: 3 lighted outlets, auto reset, no wiring.
Still not sure?
Ask yourself one question: "If this turned back on by itself right now, could anyone get hurt?" If the answer is yes, buy manual reset. If the answer is no, and it's more important that it keeps running, buy auto reset.
Have a specific piece of equipment in mind? Contact us and we'll help you pick.