Class II Lighting Protection System (LPS) requires a #2/0 AWG Copper down conductor.

• A. True
• B. False
• C. Not specified
• D. Other gauge

Answer: (A)

Class II LPS relies on a down conductor that can carry the lightning surge current to ground with low impedance, so the conductor must be large enough to handle the energy without overheating and to maintain a solid bond to the grounding system. For Class II, the required copper down conductor size is a minimum of #2/0 AWG. This size provides the necessary current-carrying capacity and mechanical durability, ensuring the surge is safely directed to ground and the structure remains protected as described in the R56 guidelines. Using a smaller conductor would not meet the standard and would compromise protection, while a larger one still satisfies the requirement.