Circuit Breaker Clamp-on Lock – 120/277 Volt – 10 Pack

  • Works with most 120/277V circuit breakers
  • Can secure up to ⅝” wide by ½” thick toggles
  • Adjustable clamp-on lock
  • Non-conductive and high-impact polypropylene body
  • Thumbscrew design for faster deployment


  • An American-owned company
  • 100% OSHA compliant
  • 10 red clamp-on style lockout tagout breaker lockouts
  • Fits breakers of different sizes
  • Needs no tools to attach
  • Weather-resistant and chemical-resistant
  • High resilience to extreme environments
  • Comes with cleats to accommodate wider-spaced breakers

TRADESAFE’s clamp-on circuit breaker lockout devices are designed to fit most 120/277V breakers. The devices can fit single pole breaker toggles that are up to ⅝” wide and ½” thick. Because they have a thumbscrew design, there’s no need to use tools in order to apply these devices. 

These devices are compliant with OSHA standard 1910.147 and are therefore made to keep employees safe in any industrial workplace. They have a polypropylene body that does not conduct electricity, making it safe to touch and handle. With this design and construction, these circuit breaker lockout devices are guaranteed to secure hazardous power during maintenance and repair jobs.

Additionally, employees can use these lockout devices on different breakers at any time. Even though they can accommodate a variety of breaker sizes, these devices are guaranteed to be able to keep the breaker pole or toggle firmly in the off position until maintenance and repairs are finished.


When used as part of an OSHA compliant LOTO system, these circuit breaker lockout devices secure hazardous power during maintenance and repair and properly guard against re-energizing. 

TRADESAFE products are made to withstand adverse conditions without fail. This is why our products are trusted by individuals, large companies, and state agencies all over the country for employee workplace safety. Each product is engineered with durability and dependability in mind, and manufactured with safety as the top priority.

120/277V clamp-on circuit breaker lockout devices can be used with TRADESAFE’s safety lockout tagout padlocks, tags, and hasps. This pack of 10 is ideal for restoring depleted kits and stations


The TRADESAFE team of professionals is committed to helping its customers become compliant with OSHA safety requirements. Our lockout devices are incredibly strong and resilient, which is why you can trust them to keep your employees safe.

TRADESAFE has a proven track record and is a brand that you can trust to provide you with reliable safety products. We design all of our equipment and devices so that you can rest easy knowing you will be able to avoid potentially hazardous situations. We have helped a large collection of businesses across many industries and regions of the country, and we aspire to continue assisting new companies in meeting appropriate safety standards.

We are your partner in safety and always keep in mind the seriousness of that role. That’s why all of our lockout tagout products are industrial-grade and meet regulatory standards. They are all ideal for use in the lockout of electrical and many other energy applications.

We don’t want to just be your supplier. We want to be your partner. For this reason, we approach things differently. Each and every day our team works to improve our products and the services we provide to the great people and businesses that put so much faith in us.

TRADESAFE is a USA-based company. This helps us stay up to date on the latest OSHA safety standards. We are inspired by the American worker and we are honored to help keep you safe from harm and hazards.


  • TRADESAFE: A USA-based company well-versed in OSHA regulations
  • People-centered supplier of safety products
  • High-quality products made of heavy-duty and durable materials
  • Constant innovation and continuous adaptation to new standards

TRADESAFE® lockout tagout devices are designed to be durable, substantial, standardized, identifiable, and exclusive for safety. Every lockout tagout device we sell complies with best practices for a government-compliant LOTO program.

Our products help secure electrical and mechanical hazards and can be applied to electrical circuit breakers, switches, plugs, boxes, ball valves, lockout hasps, gate valves, and other lockout points.


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