What is the minimum calculated service load for 50-6KW electric clothes dryers installed in apartment units?

To determine the minimum calculated service load for 50 electric clothes dryers, the National Electrical Code provides specific guidelines. When calculating the demand for electric clothes dryers, the first few dryers are typically calculated at their full load (in this case, 6 kW per dryer), and then demand factors are applied.

For 50 dryers, the first few can be taken at full load, and a demand factor can be applied to the remaining units. In general, it's common to calculate the service load by taking 12 kW for the first load (which could be 2 dryers at 6 kW each). After that, demand factors are typically applied based on NEC guidelines.

Calculating the total load:

• The first 12 kW (from two dryers),

• For the remaining 48 dryers, demand factors reduce their load calculation significantly.

Thus:

• For 50 dryers at 6 kW, we calculate: 2 dryers fully (12 kW) and apply demand factors to the rest.

The total calculated service load rounds to 75 kW, based on how these demand factors work. Therefore, the answer of 75 kW reflects the proper application of these calculations, making it the minimum load justification according to NEC guidelines