Locking to suspend unused devices, or when the device is not in use, the device must be Lockout and Tagout. Personal locking is the method advocated in locking programs. When handling machines or processes, employees should add their own locks to the equipment. The locks must be used with different keys (one key with multiple locks is not allowed). When more than one employee uses or maintains the same machine, each employee shall attach his or her own lock to the machine. Clasp for collective locking must be suitable for multiple locks. Employees must test the machine after locking it to make sure all energy has been turned off or eliminated. The employee attaches locks and other tools to the machine or instrument with power so that it cannot be activated casually.

When the "Lockout" method cannot or is not suitable for the machine or instrument, a sign with a danger image or text is placed next to the powered machine or instrument to alert the operator of the danger. It is not sufficient to use the Lockout program alone on electrically driven equipment. The Lockout Tag program should only be used when the Lockout program cannot be used and the following precautions must be observed: the degree of hazard and appropriate precautions must be observed; All employees concerned or likely to be involved must be informed of the hazardous situation and precautions; The Tag must be securely hung on the relevant machine and the contents of the Lockout Tag must be legible, including the date and time of the Lockout Tag and by whom the Lockout Tag is placed.