What is the primary purpose of a restraining cord on the pendant control box of an overhead crane?

The primary purpose of a restraining cord on the pendant control box of an overhead crane is to prevent strain on the electric cord. This restraint acts as a safeguard by reducing tension and potential wear on the cable, which can be subjected to pull or tugging when the operator is maneuvering the crane. By securing the electric cord, the restraining cord helps to avoid damage that could lead to electrical hazards or operational failures, ensuring both safety and functionality in the crane's operation. This maintenance of integrity is crucial in overhead crane operations, where power and control systems are vital for safe lifting and movement of materials.