Which voltage level is classified as low voltage or utilization voltage?

The classification of low voltage or utilization voltage is commonly recognized as encompassing systems that operate at 600 volts or less. This standard is crucial because it defines safety parameters for electrical installations and equipment, ensuring that devices can safely operate without risk of arc flash or electric shock under normal conditions.

In accordance with various electrical codes and standards, 600 volts is significant as it represents the threshold where certain safety measures and installation requirements become more stringent. Above this voltage, additional regulations come into play to protect users and infrastructure, indicating that voltages higher than this are regarded with more caution and require greater expertise.

The other voltage levels presented in the question are not classified as low voltage according to standard industry definitions. While they may represent category thresholds for different applications or systems, they do not fall into the commonly accepted range for low voltage classifications.