According to safety regulations, electrical systems of over 1,000 volts must not be grounded when supplying portable or mobile equipment. Is this statement true or false?

The statement that electrical systems of over 1,000 volts must not be grounded when supplying portable or mobile equipment is false. In practice, grounding of high-voltage systems, including those exceeding 1,000 volts, is critical for safety when supplying power to mobile or portable equipment. Proper grounding helps protect both the equipment and personnel from electrical shock, short circuits, and fault currents.

Grounding serves as a safety measure by providing a path for fault currents to flow safely to the ground, thereby minimizing the risk of electrical hazards. While specific regulations and practices may vary depending on the jurisdiction and type of installation, in general, high-voltage systems still require appropriate grounding to ensure safe operation, even when they supply portable or mobile equipment.

Therefore, the assertion in the statement is incorrect, and the appropriate grounding protocols apply regardless of the voltage level, confirming that the answer is indeed false.