Final answer:
For a circuit protected by a 70-ampere fuse, the minimum size of the aluminum equipment grounding conductor is 8 AWG, according to NEC standards. This ensures safety and compliance with electrical codes. Therefore, option b, 8 AWG, is the correct choice.
Explanation:
Determining Aluminum Equipment Grounding Conductor Size
When selecting the size of an aluminum equipment grounding conductor for a circuit protected by a 70-ampere fuse, it is essential to refer to the National Electrical Code (NEC) standards to ensure safety and compliance. According to NEC Table 250.122, the minimum size of a grounding conductor is based on the rating of the overcurrent protection device.
For a 70-ampere fuse, the table specifies:
- Aluminum conductors should be a minimum of 8 AWG for circuit ratings equal to or less than 100 amperes.
This means the correct answer for the size of the aluminum equipment grounding conductor for a circuit protected by a 70-ampere fuse is 8 AWG. Therefore, option b. 8 AWG is the correct choice. It is important to always follow local electrical codes and regulations.
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