Master Lock S3821 — Circuit breaker lockout (Grip Tight™ Plus)
The Master Lock S3821 is a Grip Tight™ Plus lockout device designed for locking out miniature circuit breakers rated at 120/240 V. The device is intended to prevent unauthorized operation of the circuit breaker handle by mechanically securing itself around the handle and holding it in the off position.Description and features
- Lightweight, one-piece construction that installs without tools.
- The stainless steel thumb screw combined with a toothed jaw ensures a firm grip on the circuit breaker handle.
- Large, knurled thumb screw with slot for optional screwdriver adjustment.
- Compact size, allowing circuit breakers to be locked out horizontally and vertically in close proximity.
- Suitable applications include multi-pole circuit breakers and tie-bar toggles, as indicated by the manufacturer.
Application notes
As a Grip Tight™ Plus device, the Master Lock S3821 is installed without tools and used for direct mechanical attachment around the miniature circuit breaker handle. The product's toothed jaw and stainless steel thumb screw are the mechanical elements that provide the grip around the handle, and the compact design allows the lock to be used in cramped setups with horizontal or vertical adjacent spaces.Specifications
- Model: S3821
- Manufacturer: MASTER LOCK
- Product name: Master Lock S3821 (Grip Tight™ Plus circuit breaker lockout)
- Application: For miniature circuit breakers, rated 120/240 V
- Construction: Lightweight, one-piece design — installs without tools
- Thumb screw: Stainless steel, large knurled thumb screw with screwdriver slot
- Jaw: Toothed jaw for firm grip on circuit breaker handle
- Compatibility: Suitable for multi-pole circuit breakers and tie-bar toggles; can lock out circuit breakers vertically and horizontally
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