What must be installed around the outer perimeter of the orchestra lift?

• A. A barrier, and the lockout contacts must be connected.
• B. A barrier only.
• C. Lockout contacts only.
• D. A guard rail and harness.

Answer: (A)

The key idea is that safe operation around an orchestra lift requires both a physical boundary and an electrical safety step to prevent accidental movement. A barrier around the outer perimeter provides a clear, physical stop to keep people out of the danger zone where the lift could move or pinch points could occur. But a barrier alone doesn’t stop the machine from being energized or moved if someone accesses a control. That's why locking out the controls matters: lockout contacts ensure the lift’s power circuit is disabled so the lift cannot be operated until the lock is removed by an authorized person. Together, the barrier prevents entry to the hazardous area and the lockout system prevents any movement, covering both access control and machine de-energization. A barrier alone or lockout alone leaves gaps in safety, and a guard rail and harness addresses fall protection for workers rather than controlling access and power around the lift.