LOTO
Lockout Tagout (LOTO) Equipment & Supplies
Lockout/Tagout (LOTO) is the procedure for isolating energy sources — electrical, hydraulic, pneumatic, mechanical, chemical, and thermal — before performing service or maintenance on equipment. OSHA 29 CFR 1910.147 (The Control of Hazardous Energy) is one of OSHA's most frequently cited standards. It requires employers to develop written energy control procedures, train authorized and affected employees, and provide energy-isolating devices (locks, hasps, and lockout hardware) that can only be removed by the employee who applied them. Tags alone are not sufficient where locks can be applied.
Safe-Fast stocks 20 LOTO products across two subcategories from Master Lock and Brady:
- Master Lock LOTO Products:
- Commercial Laminated Padlocks 1DCOM (15/16" or 2.5" shackle) — reinforced 1-3/4" laminated steel padlocks for lockout applications requiring a durable, individually keyed lock.
- Grip-Tight Standard Circuit Breaker Lockout — patented grip mechanism fits standard height and tie-bar toggles (120V–240V breakers). No screwdriver needed.
- Grip-Tight Wide & Tall Circuit Breaker Lockout — fits wide or tall breaker toggles on high-voltage/high-amperage breakers.
- Adjustable Cable Lockout 6' — 5/32" pull-tight cable with integrated safety lockout hasp; ideal for securing multiple energy points simultaneously.
- Labeled Snap-On Lockout Hasp — spring-loaded arm accepts up to 5 padlocks; for group lockout where multiple authorized employees each apply their own lock.
- Large Ball Valve Lockout S3477 (1-1/4"–3") — one-piece design locks quarter-turn ball valves in the OFF position.
- Group Lock Box 498A (Portable) — portable group lockbox for complex multi-energy-source equipment. Workers insert their individual lock key, securing it until all workers remove their padlocks.
- Latch Tight Group Lock Box 503 (Red) — Latch Tight™ design prevents key access until the last padlock is removed; wall-mountable or portable.
- Brady Breaker Lockouts:
- Brady Clamp-On Breaker Lockout 120/277V — thumbwheel design; no screwdriver; works on single-pole and multi-pole breakers.
- Brady Clamp-On Breaker Lockout 480/660V — same design, rated for higher-voltage panels.
- Brady Oversized Clamp-On Breaker Lockout 480/660V — fits switches up to 2-1/4" wide × 7/8" thick for oversized high-amperage breakers.
- Tags & Signs:
- Danger Do Not Operate Tags (100-Roll) — portable roll of perforated LOTO tags; pull a tag wherever needed without accessing a supply cabinet.
For group lockout kits, electrical panel lockout kits, or LOTO training programs, call Safe-Fast at 1-800-723-3620 or visit our Safety Training page.
There are no products listed under this category.
Lockout Tagout (LOTO) — Frequently Asked Questions
OSHA 29 CFR 1910.147 requires employers to:
- Develop a written energy control program and documented procedures for each piece of equipment or type of equipment
- Train authorized employees (who perform the lockout) and affected employees (who work in the area) on energy control procedures
- Provide energy-isolating devices — padlocks, hasps, breaker lockouts, valve lockouts — capable of accepting only one key, held exclusively by the authorized employee
- Conduct annual inspections of energy control procedures
- Use tagout devices only where lockout devices cannot be applied; tagout alone provides less protection than lockout
The standard applies to all energy sources including electrical, hydraulic, pneumatic, mechanical, chemical, and gravity/stored energy. It does not apply to work on cords and plugs (use NFPA 70E and plug lockouts) or hot work under NFPA 70E for energized electrical work.
A lockout uses a physical locking device (padlock) to hold an energy-isolating device — circuit breaker, valve, disconnect switch — in the safe (de-energized) position. The padlock has a unique key held exclusively by the authorized employee. No one else can re-energize the equipment while the lock is in place.
A tagout uses a warning tag attached to the energy-isolating device to warn others not to operate it. Tags are not a physical restraint — they cannot prevent accidental or unauthorized re-energization. OSHA requires that lockout be used wherever the energy-isolating device is capable of being locked; tagout-only programs are permitted only when the equipment design physically prevents the use of a lockout device.
A group lockbox (also called a group lock box or shadow box) is used when multiple authorized employees need to work simultaneously on the same piece of equipment under lockout. The procedure works as follows:
- One authorized employee applies locks to all energy isolation points on the equipment, then places all the keys inside the group lockbox
- Each worker applies their own personal padlock to the hasp of the lockbox
- The equipment remains locked out until every worker removes their personal padlock from the lockbox — no single person can access the equipment keys until all workers are clear
Group lockboxes are required wherever more than one authorized employee is working on the same equipment simultaneously under the same energy control procedure. The Master Lock 498A portable group lockbox and 503 Latch Tight lockbox are in this category.
Breaker lockout selection depends on the breaker toggle size and panel voltage:
- Standard 120V–240V residential/light commercial breakers (standard height, tie-bar toggles): use the Master Lock Grip-Tight Standard or Brady Clamp-On 120/277V
- High-voltage/high-amperage breakers (wide or tall toggles): use the Master Lock Grip-Tight Wide & Tall or Brady Clamp-On 480/660V
- Oversized industrial breakers (up to 2-1/4" wide × 7/8" thick): use the Brady Oversized Clamp-On 480/660V
When in doubt, measure the breaker toggle width and thickness before ordering. Breaker lockout devices that don't fit the toggle securely provide inadequate protection. Call Safe-Fast at 1-800-723-3620 for selection help.