True or False: When a switch with a handle is operated by someone standing on the ground, an insulator failure can cause the frame of the switch and structure to become energized.

• A. Not sure
• B. Indeterminate
• C. True
• D. False

Answer: (C)

When you’re operating a switch from the ground, you rely on insulating parts to keep the live conductors separate from the metal frame and the structure. If an insulator fails, a path can form from a live conductor to the switch frame. The frame and surrounding structure can then become energized. Even though the operator is on the ground and using an insulating handle, the energized frame can present a shock hazard—through the handle, through arcing, or through the ground return path—because the frame is no longer isolated from the live voltage. So, yes, insulator failure can energize the frame and structure, creating a dangerous situation for someone on the ground.