What are the three parts of an LPS?

• A. A system of air terminals, a system of earth electrodes, a conductor system connecting air terminals to the earth electrode system.
• B. A roof vent, a drain, a light fixture
• C. A set of cables, a control panel, a surge protector
• D. An antenna, a battery, a switch

Answer: (A)

An LPS is built around three essential parts that work together to safely intercept and drain a lightning surge. Air terminals serve as the points of interception, placed at strategic high spots so a strike is attracted to them rather than to the building itself. A network of conductors provides a low-resistance path from those air terminals down the structure to the ground, guiding the surge away efficiently rather than through walls or equipment. The earth electrode system completes the path by connecting the conductors to the earth, dispersing the current into the ground and keeping system voltages at safe levels. Together, interception, conduction, and grounding form a complete, functioning lightning protection system.

The other options describe components for unrelated functions—like roof fixtures or drainage, general electrical components, or equipment not specific to lightning interception and grounding—so they don’t fit the purpose of an LPS.