Which method is commonly used to join two wires together?

Wire nuts are commonly used to join two or more wires together because they provide a secure and insulated connection. They are designed for easy installation and can accommodate various wire sizes, making them versatile for numerous electrical applications.

When using wire nuts, the stripped ends of the wires are twisted together, and then the wire nut is screwed onto the twisted connection. This not only secures the wires but also protects the connection from moisture and other environmental factors, reducing the risk of electrical faults.

While other options, like wire ties, are useful for organizing or securing wires, they do not create an electrical connection. Romex refers to a type of electrical cable rather than a joining method, and wire staples are primarily used to secure cables to a surface rather than connect them. Hence, wire nuts stand out as the most appropriate choice for joining wires effectively.