Zap Through 2026 EVT F4: Ace Electrical Systems & Components with Spark!

Insulators are materials that resist the flow of electric current. They are used to wrap and separate conductors so electrons don’t take unintended paths, which prevents short circuits, leakage, and shock hazards. That’s exactly what a non-conducting substance used to insulate wires is called. It surrounds the conductive metal (like copper) and provides a high resistance barrier, keeping current where it’s supposed to go.

In contrast, a conductor easily allows current to flow, a semiconductor has conductivity that can be controlled for devices like diodes and transistors, and a resistor is a specific component that intentionally limits current but isn’t the insulating material itself.