What is the minimum calculated service load for 20-6 kW electric ranges installed in dwelling units?

The minimum calculated service load for 20-6 kW electric ranges installed in dwelling units is determined based on the guidelines provided in the National Electrical Code (NEC). According to the NEC, the general rule for calculating the load of electric cooking appliances, specifically ranges, involves considering the rated capacity of the appliances and multiplying it by a defined load factor, which helps in determining the overall demand load.

In this case, for ranges with a rating of 20-6 kW, the total calculated load becomes 33.6 kW. This value is the result of applying the necessary factors and considerations specified in the NEC for calculating the load of such devices in a residential context. This means that when designing a service for a dwelling unit with these ranges, the electrical system needs to be able to handle at least this amount to ensure safety, functionality, and adherence to regulations.

The other options do not reflect the correct application of the NEC guidelines or may misrepresent the load calculations based on typical standards for electric ranges. Therefore, understanding the specified load calculations and their applications is critical for proper electrical system design in residential environments.