A manual disconnect switching device includes an external housing having a handle actuator. The manual disconnect switching device further includes a bellows actuator in communication with the handle actuator and hermetically sealed within an internal volume of the external housing. The bellows actuator includes a shaft and a biased bellows for switching the manual disconnect switching device between open and closed positions.

A circuit breaker is configured to ensure electrical safety when working on its circuits. The circuit breaker comprises a housing with an exterior boundary. The housing includes an integrated Lock-Off feature. It is integrated to one or more housing components of the circuit breaker not as a separate component to achieve most simplicity and least space used as compared to an add-on accessory based Lock-Off feature. The integrated Lock-Off feature has a feature that is configured to receive a shackle or a shank of a padlock. The circuit breaker further comprises a built-in Lock-Off mechanism including a handle that is configured to move relative to the feature. The built-in Lock-Off mechanism in combination with the Lock-Off feature is configured to prevent handle from being turned ON with the use of padlock. The padlock prevents circuit breaker from turning ON by impeding the handle from moving to an ON-position.

In one embodiment, a lockout/tagout method implemented in a multi-user mechanical locking device in an industrial system includes wirelessly accepting a unique electronic locking command having a predetermined protocol at the multi-user mechanical locking device from each of two or more registered processor-based worker devices of the workers performing the maintenance task, in response to the accepted unique electronic locking commands, operating a lock actuator in the multi-user mechanical locking device to a lock position, wirelessly accepting a unique electronic unlocking command having a predetermined protocol at the multi-user mechanical locking device from each respective one of the two or more registered processor-based worker devices, where the multi-user mechanical locking device is restricted from accepting the unique electronic unlocking command during a predetermined time range, and in response to the accepted unlocking commands of the two or more registered processor-based worker devices, operating the lock actuator to an unlocked position.