Upgrade or repair your corded lighting and small appliances with the rugged, dependable 933B‑BOX Feed‑Thru Cord Switch from Cooper Wiring Devices (Eaton). Engineered for long‑term performance and safe electrical operation, this inline cord switch is designed for both flat and round cords, making it ideal for lamps, portable fixtures, commercial lighting rigs, retail displays, and a wide range of cord‑connected devices.

Its compact yet durable construction is built from high‑quality polycarbonate, providing an excellent balance of strength, heat resistance, and reliability. Whether you're performing lamp repairs, outfitting new fixtures, or replacing a worn‑out switch, the 933B‑BOX provides a clean, professional solution that is easy to install and built to last.

This switch is widely recognized for its feed‑through inline design, single‑pole ON/OFF operation, and compatibility with multiple common cord types—including SPT‑1, SPT‑2, HPN, and SVT—making it one of the most versatile inline cord switches in the industry.

Product Overview

The Cooper/Eaton 933B‑BOX is a specification‑grade, feed‑through inline switch designed for 120‑volt applications up to 3 amps. Its insulation‑displacement terminals eliminate the need to strip the cord insulation, greatly speeding installation while maintaining a secure, safe connection. The switch supports both flat and round cords up to a maximum diameter of 9/32 inch, offering broad compatibility for light‑duty electrical devices.

Built to operate reliably in a wide range of environments, the switch is rated for temperatures from –40°C to 65°C, ensuring dependable performance in both indoor and challenging conditions. This makes it suitable for household use, commercial environments, workshops, and field‑service environments.

Key Features

• Feed‑Thru Inline Design — Enables simple ON/OFF control for lamps, appliances, and other cord‑connected devices. 
• Single‑Pole Switching (SPST) — Straightforward ON/OFF operation ideal for most light‑duty uses. 
• Insulation‑Displacement Terminals — No stripping required; terminals pierce the conductor insulation to create a secure electrical connection. 
• Compatible With Flat & Round Cords — Supports 18/2 and 16/2 SPT‑1, SPT‑2, HPN, and SVT round cords up to 9/32 in. diameter. 
• Durable Construction — High‑strength polycarbonate or phenolic body provides heat resistance, durability, and long service life. 
• Wide Temperature Rating — Operates safely from –40°C to 65°C. 
• UL and CSA Certified — Meets rigorous safety standards for cord‑mounted electrical devices. 
• Compact Profile — Small size allows easy integration into lamp cords or appliance wiring without adding bulk. 
• Brown Finish — Neutral color blends with most lamp cords and fixtures. 

Specifications

• Product Type: Feed‑Thru Inline Cord Switch
• Switch Type: Single Pole (SPST), ON/OFF operation 
• Amperage Rating: 3A 
• Voltage Rating: 120 VAC
• Terminal Type: Screw terminals and/or insulation‑displacement terminals 
• Cord Compatibility:
  • 18/2 SPT‑1, SPT‑2, HPN
  • 16/2 SPT‑1, SPT‑2, HPN
  • Round cords including SVT (up to 9/32 in diameter) 
• Material: Polycarbonate or phenolic construction (high‑heat‑resistant) 
• Temperature Range: –40°C to 65°C 
• Dimensions: Approximately 0.92 in (L) × 2.54 in (W) × 1.44 in (H) 
• Color: Brown 

Applications

The 933B‑BOX Feed‑Thru Cord Switch is designed for a wide variety of residential, commercial, and light‑industrial uses:

• Lamp Repairs & Restorations — Perfect for table lamps, floor lamps, and vintage lighting updates.
• Custom Lighting Builds — Adds inline switching to pendant lights, accent lights, or portable fixtures.
• Retail & Commercial Displays — Allows quick ON/OFF control of display lighting without accessing wall power switches.
• Workshops & Garages — Ideal for portable work lamps, handheld utility lamps, and test equipment.
• Hotel & Hospitality Fixtures — Frequently used in bedside lamps, decorative lighting, and desk fixtures.
• Field Service & Temporary Installations — Reliable choice for mobile or temporary lighting where inline switching is needed.