Which of the following is required for lightning protection ground rods?
They must be bonded to all buried water and gas lines
Bends in ground wires must be made as close as possible to a right angle
Lightning grounds must be connected to all ungrounded wiring
They must be bonded together with all other grounds✓پاسخ درست
توضیح
Multiple separate ground electrodes at different points can sit at very different potentials during a strike, and that difference drives current through whatever equipment bridges them. Bonding all grounding electrodes together into one system forces them to rise and fall together, so no destructive potential difference appears.