Why should sharp corners not be put on ground leads within a building?

When considering the design and installation of ground leads within a building, avoiding sharp corners is important because sharp bends can disrupt the flow of electrical current. Sharp corners create points where electrical stress can concentrate, potentially leading to failures or increased susceptibility to interference.

The correct reason for avoiding sharp corners is that they can contribute to signal reflection and, more critically, can introduce vulnerability to electrical discharges, such as those from lightning. Lightning seeks the path of least resistance, and sharp corners can create a situation where the protective grounding system is less effective or where arcing may occur at those points. Therefore, keeping the ground lead as straight and smooth as possible helps ensure proper grounding and reduces the risk of electrical faults.

In the context of the other choices, while factors like interference and resistance are considerations in electrical systems, they do not specifically address the risks associated with the geometry of ground leads in relation to lightning and discharges. Overheating can occur in other contexts, but it is not the primary concern when discussing the specific design of grounding leads.