Tagout devices must also be standardized according to print and format. This means that only the employer's devices can be used for lockout-tagout. Locks and Tags should be identifiable. They must show the identity of the employee who applied the device. Locking out one source of power to a piece of equipment may not be enough.
Some machines use a combination of power supplies.
If the main power source has been turned off, then so should the backup generator. Tags must be put in the same location a lock would be placed. Only the locks and tags supplied by the employer are to be used. Every employee in the work crew must attach his or her personal lock. More than one employee can lock out a single energy isolating device by using a multiple lock hasp.