In terms of bonds in metal conduits, which option is correct?

The correct choice emphasizes the importance of ensuring electrical continuity throughout the entire length of metal conduits in a lightning protection system. Bonding metal conduits both at the ends and at any break in electrical continuity is critical for maintaining an effective ground. This is because any interruption in the electrical path could lead to potential differences that can increase the risk of arcing or failure during a lightning strike.

By bonding at both ends, the conduits provide a continuous conductive path that allows for safe dissipation of electrical energy. Additionally, bonding at breaks enhances the reliability of the system, ensuring that even if segments are disconnected or have joints, the electrical connection remains intact. This comprehensive bonding approach helps to minimize the risk of lightning-induced electrical surges, making the entire grounding system more effective and reducing the risk of damage to structures and equipment.

In contrast, limiting bonding to only connections between segments would not adequately address the potential for failures elsewhere in the system, while bonding only at the starting point or at random intervals fails to establish a reliable and continuous grounding path, which is essential for lightning protection.