👉 Uninsulated is a type of insulation used in electrical wiring and construction to prevent heat from escaping through gaps or cracks. It is usually made of polyvinyl chloride (PVC) or other materials that are resistant to heat and can be enclosed within an insulating material like fiberglass or foam, creating a barrier between the wire and the surrounding environment. Uninsulated wiring systems can help reduce electrical system maintenance costs by not requiring extensive insulation work.