Final answer:
The high-voltage wires connected to metal-frame towers are not wrapped in insulating material; this statement is false. These wires are bare and insulated by the air, which is an important safety measure to reduce the threat of accidents in the cable industry.
Step-by-step explanation:
The statement about high-voltage wires is false. The high-voltage wires that are seen connected to tall metal-frame towers are indeed held aloft by insulating connectors, which prevent electricity from traveling down the towers to the ground. However, these wires are not wrapped in an insulating material. Instead, the high-voltage wires are bare and are insulated by the air around them. In the cable industry, wires are often insulated due to the closer proximity to people and objects that could conduct electricity if contacted. In contrast, the high-voltage wires are placed high above the ground to keep them out of reach and utilize air as a natural insulator. This is one safety measure practiced within the industry to reduce the threat of electrical accidents.