A supermarket is replacing its refrigeration system. The existing system has a 480V, 3-phase power supply. According to the 2024 UMC, what is the minimum size of the grounding conductor required for this system?
- A6 AWG
- 8 AWG
- C10 AWG
- D12 AWG
Exam tip
Always check the specific requirements for grounding conductors in the UMC.
Why B is correct
The 2024 UMC Section 250.122 requires a grounding conductor of not less than 8 AWG for 480V, 3-phase power supplies.