There is no OEM locking device available for the Crouse Hinds DS415 switch although the front of the switch body does have hole for applying a padlock.
It’s not always possible for the padlock to snag the switch knob meaning it’s possible to override, even when locked.
Total Lockout have designed and produced part no. ELO-2167 switch cover locking device for this application. Designed to be locked with a safety padlock, it can also be adapted to lock with a camlock.
To fit the device you must remove the four existing fascia screws. The cover body slides into place over the switch fascia and the same retaining screws are used to fix the body cover in place.
A hinged cover lid gives you access to the switch knob. The lid cover has facility for locking with a padlock.