Table 225.61 provides clearances for conductors and live parts up to 22 kV to ground over what?

• A. Buildings and other structures
• B. Trees and shrubs
• C. Water features
• D. Inside walls

Answer: (A)

The concept being tested is the minimum vertical clearance for overhead conductors up to 22 kV to ground when those conductors cross over structures. Table 225.61 sets required distances specifically for lines that pass over buildings and other structures, to protect people and property from contact or arcing. That’s why the best answer is “buildings and other structures”—the table’s scope is the clearance above the ground as it relates to structures beneath the conductors. Clearances over vegetation, water features, or inside walls are governed by different requirements, so they’re not what this table addresses.