Which of the following can cause a high voltage transient?

High voltage transients refer to brief, high voltage spikes that can occur in electrical systems. Utility load switching is a known cause of these transients. When utilities make adjustments to the load on their systems, such as turning on or off large electrical devices or segments of the grid, it can cause sudden changes in voltage levels. These changes can lead to the generation of transient voltages, which may propagate through the electrical infrastructure.

These transients can potentially damage sensitive electrical equipment and pose safety risks if not adequately managed. In contrast, the other options, such as circuit overload, wiring issues, and ground faults, are generally associated with sustained faults or malfunctioning elements within a system rather than the abrupt voltage changes that characterize high voltage transients. Understanding the impact of utility load switching on voltage levels is crucial for anyone working with electrical systems to ensure proper protective measures and avoid equipment damage or safety hazards.