The Eaton / Cooper Wiring Devices TR274B is a high‑performance commercial‑grade combination device engineered to deliver exceptional durability, reliability, and safety in a compact, space‑saving design. Combining a single‑pole switch and a NEMA 5‑15R tamper‑resistant receptacle, this unit is ideal for both commercial and residential environments that require robust construction and dependable long‑term operation. Built with a rugged thermoplastic body, automatic grounding system, and heavy‑duty mounting hardware, the TR274B is designed for optimal longevity, secure wiring, and simplified installation.

Whether you're outfitting offices, tenant buildings, retail stores, or upgraded home applications, this combination switch/receptacle provides a convenient all‑in‑one solution without compromising performance. A neon pilot indicator, tamper‑resistant shuttering, and support for both back and side wiring further enhance its functionality and ease of use.

Key Features

• Combination single‑pole switch and duplex receptacle designed for commercial‑grade performance.
• Tamper‑Resistant (TR) shutters prevent the insertion of foreign objects for enhanced safety.
• Automatic grounding system eliminates the need for a bonding jumper in grounded metal enclosures, ensuring consistent and redundant ground continuity.
• Neon pilot light provides visual indication of switch functionality.
• Heavy‑duty thermoplastic toggle and body, offering impact resistance and long‑term durability.
• Triple‑wipe blade contacts and double‑wipe ground contacts ensure strong plug retention over time.
• Steel mounting strap, zinc‑plated for added corrosion resistance.
• Supports back and side wiring for installation flexibility (#14–#12 AWG).
• Commercial‑grade construction, suitable for high‑demand environments.
• Thermoplastic top and back body designed to resist cracking and wear under repeated use.
• Maintained-toggle operation for reliable switching.

Specifications

Electrical

• Switch Rating: 120V AC, 15A single pole.
• Receptacle Rating: 125V AC, 15A; NEMA 5‑15R duplex, 2‑pole, 3‑wire grounding type.
• Conductor Compatibility: #14–#12 AWG copper wiring.
• Switch & Receptacle Wiring: Back and side wire terminals.

Construction & Materials

• Body Material: Heavy‑duty thermoplastic.
• Toggle Material: Thermoplastic toggle designed for long‑term durability.
• Mounting Strap: Zinc‑plated steel for corrosion resistance.
• Color: Brown (BR).

Environmental

• Operating Temperature Range: –20°C to 60°C (–4°F to 140°F).
• Indoor use, suitable for commercial building environments.

Certifications

• UL Listed (cULus)
• NOM Certified
• RoHS compliant

Applications

The TR274B is engineered for a wide range of commercial and residential uses where reliability and safety are crucial.

• Commercial buildings, including offices, schools, and retail spaces needing heavy‑duty combination devices.
• Residential properties that require upgraded, tamper‑resistant power and switching solutions.
• Multi‑unit housing where space‑saving combination devices offer reduced installation time and increased convenience.
• Renovations and retrofits, particularly where existing single‑gang boxes must accommodate both switch and receptacle needs.
• Light industrial areas requiring rugged components for long‑term daily use.