What is the purpose of NEC Article 300.3?

The purpose of NEC Article 300.3 is to ensure that conductors for different systems are separated or combined appropriately. This article emphasizes the importance of maintaining proper separation between conductors of different voltage levels or systems to prevent potentially hazardous conditions, such as short circuits, interference, and overheating. By setting these guidelines, the NEC aims to enhance safety and minimize the risk of equipment failure or electrical hazards.

This focus on conductor separation ensures that the performance of electrical systems is reliable and that proper functioning is maintained without unintended interactions between different systems. Therefore, the correct answer underscores the critical aspect of electrical safety and system integrity covered in Article 300.3.