Except where specifically referenced elsewhere in the Code, Article 312 does not apply to equipment operating at over ___ volts.

Article 312 of the National Electrical Code (NEC) pertains to the installation of specific types of raceways, providing guidelines for proper installation practices primarily for the protection and routing of conductors. The specific voltage threshold mentioned in the question is significant because it delineates the boundary for which Article 312 applies.

When equipment operates at over 1000 volts, different standards may apply, necessitating specialized considerations that are not covered under Article 312. This is crucial because higher voltage systems often have unique requirements concerning equipment, safety, and installation that differ from systems operating at lower voltages. Therefore, the demarcation at 1000 volts indicates a transition to different regulatory provisions to ensure safety and compliance for installations involving higher voltage electrical conductors.

This understanding of why Article 312 has limitations based on voltage underscores the importance of adhering to the NEC's structured approach to safety and installation requirements across various operating conditions and voltages.