Final answer:
True, wire hangers should be stretched tight to manage tension, prevent sagging, and ensure safety. Balanced tension is critical for consistent distances and functionality.
Step-by-step explanation:
The statement "When installing wire hangers, the wire should be stretched tight" is true, especially in the context of high-voltage wire installations. This is because the tension in the wires must be precisely managed to prevent excessive sagging and to ensure consistent distances from the ground and other objects for safety and functionality. Tension in a connector like a wire or rope is the result of force being applied at either end, pulling the points of the connector apart. This tension must be balanced; if the wire angles on either side of a support are equal, the tensions will be equal too. When a perpendicular force is exerted at the middle of a connector, such as with a tightrope walker, it increases the tension in the wire. Therefore, for proper installation of wire hangers, the tension should be such that the wires are taut and the forces are balanced.