A lock assembly for a switch device of an electrical power distribution system includes a first lock and a second lock. The lock assembly also includes a connector arranged to inhibit movement of the first lock when the switch device is in a first position and inhibit movement of the second lock when the switch device is in a second position. The lock assembly further includes a guard coupled to at least one of the first lock and the second lock. The guard is positionable between a first position in which the guard allows access to an actuating mechanism of the switch device and a second position in which the guard inhibits access to the actuating mechanism. The guard is moveable between the first position and the second position when at least one of said first lock and said second lock is rotated.