A restaurant is installing a new walk-in refrigerator. The manufacturer specifies a 7.5-ton refrigeration system. According to the 2024 UMC, what is the minimum size of the disconnecting means required for this system?
- A50A
- B60A
- 70A
- D80A
Exam tip
Always round up when calculating the minimum size of disconnecting means.
Why C is correct
The 2024 UMC Section 410.4 requires a disconnecting means rated not less than 125% of the nameplate rating of the refrigeration system. For a 7.5-ton system, the minimum rating is 9.375 tons, which corresponds to a 70A disconnecting means.