Where must the grounding electrode conductor connection be made if the DC system is located on the premises?

The correct answer indicates that the grounding electrode conductor connection for a DC system located on the premises can be made at any of the specified locations permitted by the electrical code. This flexibility is crucial because it allows for adaptability to different installation scenarios and ensures that the grounding system can effectively protect both the electrical system and the connected equipment.

These specified locations could include not only the main service panel but also various other points that conform to local code requirements and safety practices. By permitting connections at multiple locations, the code acknowledges the diversity of system configurations and installation environments, facilitating compliance while ensuring effective grounding and bonding.

Other options are limited to specific locations or devices, which may not always align with best practices for grounding in all installation situations. Allowing for connections at any of the specified locations ensures comprehensive coverage and enhances the overall effectiveness of the grounding system.