Final answer:
Controls and switches for protective site lighting should indeed be installed inside the protected area and locked or placed in a central station such as an alarm monitoring station. High-voltage wires on metal-frame towers are not wrapped in an insulating material, as the air provides sufficient insulation.
Step-by-step explanation:
When planning protective site lighting, controls and switches should indeed be placed inside the protected area and be either locked or guarded or installed inside a central station, such as an alarm monitoring station. This is a security measure designed to prevent unauthorized access or tampering with the lighting system, which could compromise the protective lighting's effectiveness.
Additionally, addressing the statement regarding high-voltage wires, the claim that these wires are wrapped in an insulating material is false. High-voltage wires, such as those connected to tall metal-frame towers, are not wrapped in insulating materials. They are held aloft by insulators, which are typically made of materials like porcelain or glass, designed to prevent electrical current from grounding. However, the wires themselves are not covered in insulation because the air around them acts as an insulator and because it would be impractical and economically unfeasible to wrap high-voltage lines considering the immense lengths they span. Insulation on household wires or electrical cords is necessary due to the proximity to people and objects, which is not the case with high-altitude power lines.