What is an insulator?

An insulator is a type of material that significantly restricts the flow of electric current. It prevents the movement of charges, which is essential for maintaining the integrity and safety of electrical systems. Common insulators include materials like rubber, glass, and plastic. These materials are often used to encase electrical wires or components to protect against electric shock and short circuits, thus ensuring safe operation.

In contrast to insulators, other materials facilitate current flow, like conductors, which are typically metals such as copper and aluminum. The focus on the inability of insulators to allow current to pass emphasizes their role in electrical safety and efficiency. Understanding the properties of insulators is crucial for estheticians, especially when working with equipment that requires electricity, as it informs safe practices and equipment handling.