What is indicated by the dotted lines in the provided diagram?

The dotted lines in the provided diagram are typically used to represent mechanical interlocks. Mechanical interlocks are safety features designed to prevent certain operations from occurring simultaneously, thereby ensuring safe operation of machinery and equipment. For example, in the context of motor controls, a mechanical interlock might prevent a motor from starting if a protective cover is not securely closed or another safety condition is not met.

Using dotted lines to illustrate these interlocks emphasizes their functional nature in the system without implying a direct electrical or power connection, which would typically be represented by solid lines. This visual distinction helps technicians and engineers easily identify the relationships between various components, highlighting safety and interlock movements in the mechanical design rather than in the electrical circuitry or control systems. Understanding this representation is crucial for troubleshooting and ensuring proper safety measures are in place in motor control applications.