Master Lock s3821 Circuit Breaker Lockout Miniature

Product Description

The MASTER LOCK s3821 Grip Tight Plus Circuit Breaker Lockout Device is a one-piece lockout tool designed for miniature circuit breakers rated at 120/240 volts. It installs without any tools, making it fast to deploy in lockout/tagout (LOTO) procedures. The stainless steel thumbscrew and toothed jaw clamp firmly onto the breaker handle, keeping the device secure throughout the lockout period. Its compact, lightweight construction allows it to fit in tight panel layouts where adjacent breakers are installed vertically or horizontally side by side.

This lockout device is intended for use in residential and light commercial electrical panels wherever miniature circuit breakers are installed. Electricians and maintenance personnel use the s3821 when performing LOTO procedures required by OSHA 29 CFR 1910.147. The compact profile accommodates multi-pole breakers and tie-bar toggle configurations, making it suitable for a wider range of panel types without the need for additional adapters or hardware.

Key Features

• Tool-free, one-piece design installs and removes quickly during LOTO procedures
• Stainless steel thumbscrew and toothed jaw provide a firm, secure grip on breaker handles
• Compact size fits vertically and horizontally adjacent miniature breakers
• Compatible with multi-pole breakers and tie-bar toggle configurations
• Rated for 120/240 volt miniature circuit breaker applications
• Plastic construction keeps weight low without sacrificing clamping performance

Compatibility

Designed for miniature circuit breakers rated at 120/240 volts, including multi-pole breakers and tie-bar toggle styles. Also suitable for vertically and horizontally adjacent breaker positions in standard residential and light commercial panels.

Installation Notes

Licensed electricians and qualified maintenance personnel should install this device as part of a formal LOTO program in compliance with OSHA 29 CFR 1910.147. De-energize the circuit and verify zero-energy state before applying the lockout device. No tools are required for installation. Do not use this device as a substitute for a full LOTO procedure.

Technical Specifications

• Voltage Rating: 120/240 volts
• Case Material: Plastic
• Thumbscrew Material: Stainless Steel
• Color: Red and Black
• Country of Origin: China

Standard Information

• Brand: MASTER LOCK
• Manufacturer Part Number: s3821