20A Tamper-Resistant Self-Test GFCI Receptacle
- 20A GFCI receptacle for higher-amperage indoor protection projects
- NEMA 5-20R face with the characteristic T-slot configuration
- Tamper-resistant shutters for specified interior safety requirements
- Self-test monitoring function for current GFCI replacement needs
- Indoor non-WR positioning with UL-listed GFCI certification context
Why Choose ShengYu
- North America Market Expertise
- Stable Production, Reliable Quality
- OEM / ODM for Brand Growth
- Commercial Project Supply Support
- Private Label & Packaging Customization
Available Colors
20A Tamper-Resistant GFCI Receptacle Description
20A Tamper Resistant GFCI Receptacle Self-Test is a GFCI outlet designed for indoor commercial kitchens, schools, breakrooms, high-end residential upgrades, and other interior spaces that need both ground-fault protection and tamper-resistant safety in a NEMA 5-20R wall device. It features a 20A rating, self-test monitoring functionality, a NEMA 5-20R T-slot face, a tamper-resistant design, a non-WR indoor construction, and UL-listed GFCI certification context under UL 943. It is suitable for contractors, distributors, property managers, and project buyers sourcing code-oriented 20A indoor GFCI replacements for North American installations.
NEMA 5-20R TR GFCI Features
| Product Code | TST20 |
| Certified Safety | UL, cUL |
| GFCI Type | Self-Test GFCI, Class A GFCI |
| Voltage | 125V |
| Amperage | 20A |
| NEMA | 5-20R |
| Color | White,Ivory,Almond,Black,Grey,Brown,Graphite |
| Finish | Satin |
| Operating Temperature | -35C to 66C(-30F to 150F) |
| Application Sector | Commercial, Multi-Dwelling Unit, Residential |
| Features | Alarm, Self-Test |
| Wiring Method | Back Wire and Side Wire |
| Pole | 2 |
| Wire | 3 |
| Wall Plate Included | Yes |
| Number of Receptacles | 2 |
| Standards & Certifications | UL/CSA, NEMA WD6 |
| Grounding | Self Grounding |
| Trip Level | Class A, 5mA plus or minus 1mA |
| Tamper Resistant | Yes |
| Weather Resistant | None |
| Own US Patents | Yes |
| Face Material | Thermoplastic |
| Body Material | Thermoplastic |
| Terminal | Brass-Hot, Green-Ground, Silver-Neutral |
| Country of Origin | China |
Frequently Asked Questions (FAQ)
What is a 20A tamper-resistant GFCI receptacle used for?
A 20A tamper-resistant GFCI receptacle is used in indoor locations that need both ground-fault protection and tamper-resistant safety in a higher-amperage wall device.
What is the T-slot on a 20A GFCI outlet?
The T-slot is the identifying face feature associated with the NEMA 5-20R configuration, which distinguishes a 20A receptacle format from a standard 15A format.
Why do I need a tamper-resistant 20A receptacle?
A tamper-resistant 20A receptacle adds internal shutters that help reduce the risk of foreign-object insertion. Tamper-resistant receptacles are required in many specified occupancies and locations under NEC 406.12.
Does a 20A GFCI require 12 gauge wire?
Conductor size should be confirmed from the product instructions, branch-circuit design, wiring diagram, and applicable code requirements. It should not be assumed from the receptacle face or amperage label alone.
How do I read the wiring diagram for a 20A GFCI receptacle?
The wiring diagram is used to identify line and load terminal relationships and support correct installation planning. Final wiring should always follow the exact diagram and instructions supplied with the product.
What are the NEC considerations for installing a 20A TR GFCI receptacle indoors?
Indoor suitability should be reviewed against the actual installation location, the GFCI protection requirements in NEC 210.8, the tamper-resistant receptacle framework in NEC 406.12, and the locally adopted code edition before installation.
Typical Applications
Bathrooms
NEC mandated wet location protection for hospitality and malls.
Kitchens
Reliable safety for general-use countertops near sinks.
Laundry Areas
Rugged protection for damp basements and vehicle service areas.
Multi-Unit Housing
Cost-effective, UL-listed safety for large-scale apartments.
Product Overview
5-Step Quick Wiring Guide for GFCI Receptacles
This is a general wiring reference for standard U.S. GFCI receptacle installation. Always turn off power first and verify local code and product-specific instructions before installation.
- Turn Off Power: Switch off the breaker and verify the electrical box is de-energized with a voltage tester.
- Identify LINE and LOAD: Locate the incoming power cable for the LINE terminals. If a second cable feeds downstream receptacles, identify it as LOAD and use it only when downstream GFCI protection is required.
- Connect the LINE Wires: Connect the incoming hot wire to the brass LINE terminal, the incoming neutral wire to the silver LINE terminal, and the ground wire to the green grounding terminal.
- Connect LOAD Only If Needed: If downstream protection is required, connect the outgoing hot wire to the brass LOAD terminal and the outgoing neutral wire to the silver LOAD terminal. Do not reverse LINE and LOAD.
- Mount and Test the GFCI: Fold the wires neatly into the box, mount the receptacle and wall plate, restore power, press RESET, then press TEST to confirm proper operation before resetting again.
