The BD-8313A Nylon Latch Lockout can be locked to prevent the isolated power source or equipment from being accidentally turned on until the isolation is completed and the lockout/tagout is removed. Meanwhile, using the lockout tags, it can warn people that the isolated power sources or equipment cannot be accidentally turned on.

Install the lockout on the power switch to prevent the equipment from operating during maintenance. It can be locked out for 6 people at the same time.
The equipment cannot be turned on until the last person opens their lock.