Every platform in Hoboken has a catenary line, resulting in a complex system of wires, insulators and connectors. This is how the train draws current. The Budd electrified train is a common sight. Here's the catenary connecting system on the Budd. Notice the wires and insulators.
High voltage is potent and dangerous.
It requires careful engineering to use safely. The motorman's cab on the Budd. The controls are less complex than those of diesel locomotives. The catenary connector. Notice the many insulators.