Cooper Wiring Devices AH1223L Key Lock Three Way Switch

Product Description

The COOPER WIRING DEVICES AH1223L is a specification-grade, key-lock three-way switch rated for 20 amps at 120 to 277 VAC. Built for 3-pole, single-phase wiring applications, this switch uses a key-lock mechanism to restrict unauthorized operation - a critical feature in commercial, institutional, and light industrial settings where access control is required. At 33.3mm wide, it fits standard device boxes and plates. Licensed electricians install this type of switch where NEC compliance and specification-grade durability are required.

This switch is suited for commercial and light industrial installations where lighting or fan circuits require controlled, restricted switching. The key-lock design prevents tampering or accidental switching by unauthorized personnel, making it a common choice for schools, hospitals, retail spaces, and public facilities. The wide voltage range of 120 to 277 VAC accommodates both standard single-phase branch circuits and higher-voltage commercial lighting systems without requiring a different device.

Key Features

• Key-lock switch operation restricts unauthorized use on sensitive or safety-critical circuits
• 20-amp rating handles standard and heavy-duty branch circuit loads
• 120 to 277 VAC operating range covers residential through commercial lighting voltages
• 3-pole, single-phase configuration for three-way switching applications
• Specification grade construction meets commercial project specs and inspector requirements
• Meets FULS standards and carries cULus listing

Compatibility

Designed as an OEM-style specification-grade replacement or new-installation three-way key-lock switch for commercial and light industrial branch circuit applications rated up to 20 amps and 277 VAC.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize the branch circuit at the panel and verify absence of voltage with a meter before wiring. This is a three-way device and requires correct traveler and common terminal wiring - consult the wiring diagram supplied with the device. Do not exceed the 20-amp or 277 VAC ratings.