What is the requirement for installing locks on main reduction gear panels and plates?

The requirement for installing locks on main reduction gear panels and plates is based on the number of bolts securing these components. For panels that contain 12 or fewer bolts, locks are mandated to ensure safety and security. This requirement helps to prevent accidental access and maintain the integrity of the system, as fewer bolts could potentially lead to a reduced level of structural support.

In contrast, for panels that have more than 12 bolts, the need for locks is not considered essential because the increased number of fasteners typically provides adequate stability and security without additional locking mechanisms. Therefore, the requirement specifically focuses on those that are more vulnerable due to having fewer securing elements.