Lockout/Tagout LOTO Devices — OSHA 1910.147 Padlock vs Hasp, Circuit Breaker vs Valve Lockout, Energy-Type Routing

OSHA 1910.147 does not require a specific LOTO-branded padlock — it requires padlocks that meet the performance criteria: durable, standardized, substantial, and identifiable. A standard commercial padlock that is individually keyed, has no master key, is labeled with the employee's name, and is reserved exclusively for LOTO use technically satisfies the standard. However, safety padlocks designed for LOTO have features that make compliance easier: brightly colored bodies (red is standard; yellow for electrical, green for clean/safe) that make LOTO locks visually distinct from maintenance locks; non-conductive bodies for electrical lockout; key captive when open (key cannot be removed unless shackle is closed, preventing workers from losing their key while locked out); pre-sized for common hasp and lockout device openings. Using LOTO-specific padlocks also makes program standardization easier — you can encode lockout_device.is_loto_padlock = true only on padlocks purpose-built for LOTO so buyers can filter for appropriate products.

OSHA 1910.147 defines distinct employee roles: An authorized employee is a person who locks out or tags out machines or equipment in order to perform servicing or maintenance. They apply the lock, perform the work, and remove the lock. They have training in the recognition of applicable hazardous energy sources, the type and magnitude of the energy in the workplace, and the methods and means necessary for energy isolation and control. An affected employee is someone who operates or uses a machine that is being serviced and is therefore affected by the LOTO procedure — for example, the machine operator who cannot use the machine while it is locked out. Affected employees must be notified that LOTO is in effect and why — they are not authorized to remove locks. A third category, other employees, work in areas where LOTO may be used and must know that LOTO is occurring and that they must not attempt to operate locked-out equipment. The product routing implication: authorized employees (who actually apply locks) need padlocks, lockout devices, and hasps. Affected employees may need LOTO tags and notification supplies. Other employees may need training materials. Encoding lockout_device.intended_user = 'authorized' helps distinguish tools for workers who actually perform lockout from administrative supplies.

A group lockout box (also called a group lockout station or shadow board) is a locked box that holds keys to the primary lockout devices applied to a complex machine. The sequence is: (1) An authorized employee (the lead) applies primary lockout devices to all energy isolation points (circuit breakers, valves, etc.) and places the keys in the group lockout box. (2) The lead places their own padlock on the group lockout box. (3) Each authorized crew member places their own padlock on the group lockout box. (4) The box is now locked by every crew member's personal lock. The machine cannot be re-energized until all crew members remove their locks from the box. Group lockout boxes are preferred over hasps at each energy isolation point when there are many energy sources or complex machines with multiple isolation points — it centralizes the group lock control. Encode lockout_device.device_type = 'group_lockout_box' and lockout_device.max_locks for routing when a buyer specifies "group LOTO" or "complex machine LOTO."