What Is a Tamper-Resistant Outlet?
A Tamper-Resistant Outlet is a receptacle with internal shutters that block access to the energized contacts when a plug is absent. The shutters open when matching pressure is applied to both slots by a standard plug. This design helps reduce accidental contact with electrical parts while preserving normal power access for household devices.
Quick Facts About Tamper-Resistant Outlet
Category
Electrical receptacle safety feature
Used for
Household receptacle installation
Common confusion
Not the same as a GFCI outlet
Also called
TR Outlet, Tamper-Resistant Receptacle
Often discussed with
Electrical Outlet Installation, GFCI Outlet Installation
Key Takeaways About Tamper-Resistant Outlet
- Internal shutters cover the contact openings when no plug is inserted.
- Both plug blades must apply pressure for the shutters to open.
- Tamper-resistant does not mean waterproof or ground-fault protected.
How Tamper-Resistant Outlet Works

A Tamper-Resistant Outlet uses spring-loaded shutters inside the face of the receptacle. The shutters cover the energized contact openings when nothing is plugged in. A proper plug applies matching pressure to both openings, allowing the blades to enter and connect with the contacts.
Related glossary terms: GFCI, Ground Fault.
The shutter mechanism works with ordinary plugs and does not change how a connected device receives power. A tamper-resistant outlet does not detect leakage current, interrupt a fault, or protect against moisture. Those functions relate to devices such as a GFCI outlet. During an outlet installation, the receptacle also needs correct wiring, grounding, and a secure connection at the box.

From the Center Electric Service team
When we install a Tamper-Resistant Outlet, we check the existing box, conductor connections, grounding path, and device fit. We also verify that the outlet type matches the circuit and the location. If ground-fault protection is needed, we treat that as a separate electrical function.
Tamper-Resistant Outlet in Practice: A Real-World Example
A homeowner requests a new receptacle in a bedroom where small children may access wall outlets. The installation uses a tamper-resistant outlet so ordinary plugs work while loose objects cannot easily reach the energized contacts.
Related Terms
GFCI
GFCI is a ground-fault circuit interrupter that helps protect people from electric shock. The device monitors…
Ground Fault
A ground fault is an unintended electrical connection between an energized conductor and a grounded surface…
Center Electric Service
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