The GFTR1-W delivers automatic self-test technology in a slim profile that actually fits in those cramped electrical boxes you find in older Montana homes. At 15 amps with 20-amp feed-through capability, it handles standard residential circuits while testing itself on power-up and periodically to ensure protection, with patented lockout that prevents reset if the GFCI is damaged.
Skip it if you’re just swapping out basic receptacles in dry locations. This unit shines where ground-fault protection is mandated by the National Electrical Code — kitchens, bathrooms, garages, basements, laundry rooms. The -35°C to +66°C operating range handles Montana’s temperature swings from brutal January cold snaps to August heat waves.
Self-Test Technology and Safety Features
The SmartlockPro system changes the game on GFCI reliability. The receptacle automatically tests itself and provides visual feedback through an LED status indicator. No more wondering if that old GFCI in the garage actually works — the LED tells you power status and trip conditions at a glance.
The patented lockout mechanism prevents reset if the GFCI fails to respond to a fault. That matters when you’re dealing with callbacks. A dead GFCI that won’t reset is better than one that resets but doesn’t protect.
The Class A trip level of 5mA +/- 1mA meets code requirements while the improved immunity reduces nuisance tripping from high-frequency noise. Less nuisance tripping means fewer angry phone calls about the garage door opener that keeps killing the circuit.
Built-in tamper-resistant shutters prevent insertion of foreign objects, meeting 2008 NEC requirements without needing special covers or add-ons.
Installation Advantages
The slim profile solves real problems. Reduced depth makes installation easier in shallow electrical boxes — critical for retrofit work where you can’t just swap out the box. Contractors praise the extremely easy installation due to the slim profile, with back-wiring clamps providing secure and fast connections.
| Specification | Value |
|---|---|
| Wire Accommodation | 14-10 AWG |
| Termination | Back and Side Wired (External back-wire clamps) |
| Torque Range | 14-18 in-lb |
| Terminal ID | Brass (Hot), Silver (Neutral), Green (Ground) |
| Grounding | Self-Grounding Clip |
The self-grounding clip provides reliable grounding connection directly to the metal box — one less pigtail to mess with in a crowded box. External back-wire clamps beat the stab-in connections that fail after a few years of thermal cycling.
Technical Specifications
Here’s what matters for proper selection:
| Specification | Value |
|---|---|
| Rated Amperage | 15 Amp |
| Feed-Through Amperage | 20 Amp |
| Voltage | 125 VAC |
| NEMA Rating | 5-15R |
| Short Circuit Rating | 10kA |
| Operating Temperature | -35°C to +66°C |
| Dielectric Voltage | 1,250 VAC (per UL 943) |
The 10kA short circuit current rating handles typical residential panel capacities. The wide temperature range survives unheated garages and attics — places where cheaper GFCIs fail after a few freeze-thaw cycles.
UL 943 (GFCI Standard), UL 498 (Receptacles), CSA C22.2 No. 42 & 144.1-06, Fed Spec WC-596, NEMA WD-1 & WD-6, ANSI C-73, and NOM certified — full compliance with North American standards.
Frequently Asked Questions
Can this protect multiple downstream receptacles? Yes, it can protect downstream standard receptacles when wired to the ‘Load’ terminals. One GFCI can protect an entire circuit if wired correctly.
What comes in the box? The package includes the 15A Decora GFCI Receptacle (White), matching Nylon Decora Wallplate, installation screws, and instruction sheet.
How does the slim profile compare to standard GFCIs? The GFTR1-W is part of the ‘slim’ series, significantly easier to fit into older, shallower wall boxes compared to standard GFCI units.
What’s the warranty coverage? Leviton provides a 2-Year Limited Warranty covering defects in material and workmanship under normal use.
Why do the tamper-resistant shutters feel stiff? Some users report tamper-resistant shutters can be stiff for some plugs — that’s the safety mechanism working. They’ll break in with use but never get loose enough for a kid to defeat.
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