What is the primary purpose of lock nuts in electrical connections on Terminal boards?

The primary purpose of lock nuts in electrical connections on terminal boards is to keep the connections from loosening due to vibration. In environments where electrical components are subject to movement or vibration, such as in transit systems, it is essential to ensure that connections remain tight and secure to maintain a reliable electrical circuit. Lock nuts are designed to grip the threads of the connecting screws or bolts firmly, which helps to prevent any loosening that might occur during operation.

While ensuring electrical continuity is crucial, this function is more directly related to the quality of the contact points rather than the locking mechanism itself. Preventing corrosion is important, but it is typically addressed through other means, such as the use of corrosion-resistant materials or coatings. Facilitating easier wiring is a benefit of using various types of connectors, but it does not capture the essential safety and reliability function that lock nuts serve in maintaining connection integrity under dynamic conditions.