3GRACE / FEATURE GUIDE

What Do TR and WR Mean?

TR and WR describe different product features: tamper resistance and weather resistance.

TR — Tamper Resistant

TR identifies tamper resistance at the receptacle openings. It is a feature to check on the exact model and product marking, rather than an assumption to make from the product family or face color.

WR — Weather Resistant

WR identifies weather-resistant construction. The designation is separate from TR and from ground-fault protection. UL documents these as distinct markings, and a product may combine more than one function.

The installation is a complete system

WR does not describe every aspect of an outdoor installation. The device, box, cover, mounting location and wiring must be selected together under the product instructions and locally adopted requirements. Do not treat WR as a general waterproof or submersion rating.

Find the combination you need

Use the TR and WR filters in the product finder to narrow the documented configurations. Check the resulting exact model, its certification scope and instructions before specifying it. The available comparison data does not replace the complete installation documentation.

Connect this guide to a product

Review the exact model specifications, features and documents alongside this general guide.

Compare selected models
ModelRated currentKey featuresNext step
TST1515A
  • Self-test GFCI
  • Dual LED indicators
  • Tamper-resistant configuration
View specifications
WTST1515A
  • Self-test GFCI
  • Dual LED indicators
  • Tamper-resistant configuration
  • Weather-resistant configuration
View specifications
TST2020A
  • Self-test GFCI
  • Dual LED indicators
  • Tamper-resistant configuration
View specifications
WTST2020A
  • Self-test GFCI
  • Dual LED indicators
  • Tamper-resistant configuration
  • Weather-resistant configuration
View specifications

Explore all GFCI outlets

Primary sources

UL Solutions — TR and WR marking explanation (historical terminology reference)UL Solutions — Attachment plug and receptacle evaluations
General technical information only. Verify exact installation, standards and certification requirements against the confirmed product model and locally adopted code.

Continue your product selection

Find a modelCompare models

Related articles

Self-Test GFCI: What the Feature Does

How to Check a Product Certification Record

What to Include in an Electrical Product Inquiry

What Is a GFCI Outlet?

15A vs 20A GFCI

Back to GFCI Technology