Which of the following is true when installing grounding conductors used for lightning protection?
Why A lightning strike is essentially a very fast, high-current pulse with lots of high-frequency energy, so the ground conductor's inductance matters as much as its resistance. A sharp bend adds inductance and presents a high impedance to that fast rise time, which can make the surge arc off the conductor instead of following it to ground. Good practice is to keep lightning ground runs short, direct, and with only gentle, large-radius curves.
Watch out The choice calling for precise right-angle bends is exactly backwards, and common grounds are desirable, not forbidden: all grounds at a station should be bonded together so no dangerous voltage difference develops between them.
Lightning hates corners. Short, straight, gentle sweeps - and bond all grounds together, never separate them.