Eaton 1191N Locking Ac Switch Single Pole 20A 277V

Product Description

The EATON 1191N is a single-pole locking AC switch rated for 20 amps and 277 volts, designed for commercial and industrial electrical installations where unauthorized switching must be prevented. The Corbin locking mechanism restricts operation to authorized personnel, making this switch well suited for lighting circuits, HVAC fan controls, and other branch circuits in facilities where accidental or unauthorized shutoff carries operational or safety consequences. Licensed electricians install this switch in standard wall boxes as part of a controlled-access electrical layout.

The 1191N is used in commercial buildings, schools, hospitals, warehouses, and industrial facilities where branch-circuit switching must be restricted. Its 277-volt rating makes it a direct fit for single-phase fluorescent and LED lighting circuits fed from 480Y/277-volt distribution panels, which are standard in North American commercial construction. The locking feature requires a Corbin key to toggle the switch, preventing tampering by unauthorized building occupants.

Key Features

• Single-pole configuration rated 20A at 277V AC for commercial lighting and fan circuits
• Corbin key lock mechanism restricts switch operation to authorized personnel
• Suitable for 480Y/277V panel-fed branch circuits common in commercial builds
• Designed for standard wall-box installation by licensed electricians

Compatibility

Designed as an OEM-style replacement or specification-grade locking AC switch for commercial and industrial branch-circuit applications requiring a single-pole 20A 277V device with Corbin key control.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the branch circuit at the panel and verify zero voltage with a calibrated meter before wiring. Ensure the wall box and cover plate are compatible with the switch body dimensions. The Corbin key should be retained by authorized facility personnel only and not stored at the switch location.

Technical Specifications

• Configuration: Single Pole
• Amperage: 20 amps
• Voltage: 277 volts AC
• Locking Type: Corbin Key Lock
• UPC: 040893627793

Standard Information

• Brand: EATON
• Manufacturer Part Number: 1191N