Brady 8DF456879 Oversized Breaker Lockout Device

Brady oversized clamp-on breaker lockout device (LOTO-39 family) for 480/600 V circuits clamps onto breaker switches up to 2.25 inches wide and 7/8 inch thick, providing a secure, tamper‑resistant lockout during electrical maintenance. The red polypropylene body houses a sliding, glass‑filled nylon component with a stainless steel screw and blade insert, and a new blade design delivers better grip across more breaker models. Operation is simple: clamp the device onto the breaker tongue with thumbscrews, slide the cover over the thumbscrew, and lock in place with a padlock or nylon tie to prevent the clamp from loosening; it supports use on a wide range of single‑pole and internal‑trip multi‑pole breakers. Key materials and ratings include a polypropylene body rated from −20°C to 80°C and a nylon slider rated from −20°C to 120°C, making it suitable for varying environments. This Brady lockout is used to isolate circuits during maintenance, providing a clear, enforceable visual cue that the breaker is off and cannot be energized, while fitting into standard lockout/tagout programs without relying on operator memory.