I have seen drawings showing a transient connection on ground between rods of communication system and rods of lightning ps, i know it's not required by code but the designer justified his design to disallow the return of lightning discharge, i said that we use the spd devices in all emergency panels per code including the communication, his justification which makes sense that grounding busbar in communication rooms are bonded together and go to ground, the equipment in communication room are bonded to busbar and go to rods belong to communication system accordingly there is no spd to disconnect the connection during strike unless we have a transient connection connected on ground,
If he is right, why nec doesn't require?
If he is right, why nec doesn't require?