Safety Talks – Lock Out / Tag Out
29 CFR 1910.147 details the requirements needed to control hazardous energy while servicing or performing maintenance on machinery or other equipment.
Types of Hazardous Energy:
When are Lockout-Tagout Procedures Required:
- Servicing/performing maintenance on energized equipment Any form of work on equipment when safety guards or measures are bypassed
- Any form of work which requires the individual to place any part of their body in the point of operation or designated danger zone
When Are Lockout-Tagout Procedures Not Required:
- Minor tool changes or adjustments (i.e. blade and bit changes, table saw adjustments)
- Cord and plug controlled devices (i.e. portable power tools)
- Routine, repetitive changes or adjustments that are integral to the use of the equipment; provided the work is performed using alternative measures that provide effective protection
- Affected Employee: An employee whose job requires them to operate or use a piece of equipment that is affected by the Lockout-Tagout or is working in the area where the maintenance/service is being performed
- Authorized Employee: A trained employee who locks out or tags out equipment to perform maintenance/service.
- Supervisor: The manager/supervisor of the Authorized Employee
- Lockout: The placement of a lockout device on an energy isolating device that ensures the equipment controlled by that energy isolating device cannot be operated until the lock is removed.
- Tagout: The placement of a tag on an energy isolating device notifying individuals of the work being performed. Harvard University policy never allows just a tag to be affixed to the energy isolating device, a lock and tag must be used anytime equipment needs to be de-energized and serviced
Stored or Residual Energy:
- Examples of stored or residual energy: Capacitors, springs, elevated components, rotating flywheels, hydraulic systems, and air, gas, steam water pressure etc.
- Methods of Dissipating or Restraining: Grounding, repositioning, bleeding, blocking etc.