What does the term "double-tapping" refer to in electrical systems?

The term "double-tapping" in electrical systems specifically refers to the practice of connecting two conductors under one terminal lug. This is generally considered unsafe and is a violation of electrical codes because it can lead to a poor connection and increase the risk of overheating or electrical fires. Electrical terminals are designed to accommodate a single conductor to ensure a reliable and secure connection. When two wires are connected under one lug, it may result in an uneven sharing of current, which can lead to one wire carrying more load than it can safely handle, potentially causing damage or failure.

Understanding this practice is crucial for ensuring safety and compliance in electrical work. Proper installation procedures require that each wire is independently terminated at its own connection point, allowing for safe operation and minimizing risk.