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.

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.

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