According to code, the grounding electrode conductor is sized according to which table?

The grounding electrode conductor is sized according to Table 250.66 in the National Electrical Code (NEC). This table provides the minimum size requirements for grounding electrode conductors based on the size of the service-entrance conductors. Proper sizing is crucial for ensuring that the grounding system is effective in providing a path to ground in the event of a fault, thereby enhancing safety and preventing shock hazards.

Table 250.66 specifies the appropriate conductor sizes depending on the type of grounding electrode used and the size of the largest ungrounded conductor connected to the service. This ensures that the grounding system is adequate to carry any fault currents safely to ground without exceeding the conductor's capacities, thereby reducing the risk of electrical fires and equipment damage.

Other tables referenced in the options either relate to different aspects of wiring and conductor sizing or cover specific conditions that do not directly pertain to the sizing of grounding electrode conductors. Therefore, Table 250.66 is the correct reference for grounding electrode conductor sizing according to the NEC.