What is the minimum distance that must be maintained from a nonmetallic conduit containing a high-voltage circuit operating above 100 hertz?

The minimum distance that must be maintained from a nonmetallic conduit containing a high-voltage circuit operating above 100 hertz is crucial for ensuring electrical safety and preventing electromagnetic interference. This distance allows for adequate insulation and helps mitigate the risks of arcing or unintended electrical conduction that could arise due to proximity to high-voltage circuits.

Maintaining a separation of 1 3/4 inches is important because it is aligned with industry standards that prioritize safety in electrical installations. It ensures that sufficient physical space is provided to prevent accidental contact and minimizes the risk of stray voltages affecting nearby equipment or conductors.

The other options suggest either insufficient or excessive distances that do not comply with recommended safety practices. These distances could lead to potential hazards, including electrical shorts or operational disruptions in equipment located nearby.