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The HUBBELL WIRING DEVICE-KELLEMS HBL1201L is a single-pole, key lock wall switch rated for industrial-grade service. It operates across a voltage range of 120 to 277 VAC at 15 amps, making it suitable for a wide range of single-phase branch circuits. The key lock mechanism restricts unauthorized operation, a critical feature in commercial and industrial environments where equipment control must be managed. Rated for temperatures from -40 degrees F to 239 degrees F, this switch handles demanding ambient conditions without performance compromise. Licensed electricians and qualified maintenance personnel are the typical installers for this device.
This switch is designed for industrial and commercial electrical installations where access control to switched circuits is required. Typical applications include machinery control panels, lighting circuits, HVAC equipment shutoffs, and other branch-circuit switching points where an unauthorized or accidental activation could pose a safety or operational risk. Its single-pole configuration handles standard 120V to 277V single-phase loads, covering the full range of common North American commercial lighting and equipment voltages. The black finish and industrial-grade construction suit it for exposed installation in factories, warehouses, and utility spaces.
Designed as an OEM-style replacement or new-installation industrial key lock wall switch for single-pole, 15-amp branch circuits operating at 120 to 277 VAC in commercial and industrial settings.
Installation should 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. Ensure the wall box and cover plate are sized appropriately for the device footprint of 4.0625 inches by 1.3125 inches. The key lock cylinder requires the correct key for operation — retain key documentation per site access control procedures.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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