Which table outlines the minimum sizes for grounding electrode conductors?

The chosen answer is based on the role of grounding electrode conductors in electrical installations. Table 250.102 in the National Electrical Code (NEC) provides guidelines regarding the minimum sizes for grounding electrode conductors based on the ratings of the systems being installed. This ensures that the grounding conductors are adequately sized to carry fault current safely and effectively, which is critical for protecting both the electrical system and the people who may come into contact with it.

The other tables mentioned focus on different aspects of electrical systems. For instance, Table 250.121 deals with equipment grounding conductors, providing size information for conductors that ensure safety by bonding together various conductive parts. Table 220.55 outlines load calculations for branch circuits, which helps determine the appropriate circuit capacity rather than focusing on grounding. Table 200.10 addresses service-entrance conductors and does not pertain to grounding electrode sizes. Understanding these distinctions is important for electrical apprentices as they navigate the various code tables relevant to their work.