A main line emergency disconnect switch is located in a space accessible to unauthorized persons. Which of the following is required by regulation?

1. A. The switch must be capable of being locked in both the open and closed positions.
2. ✓ The switch must have a means to lock it in the open-circuit position with a padlock or equivalent, and must not lock in the closed-circuit position.Correct
3. C. The switch must be relocated to a space not accessible to unauthorized persons.
4. D. The switch must be fitted with a key-operated interlock that prevents operation without a supervisor present.