What is the minimum calculated service load for a 1-18 kW electric range installed in a dwelling unit?

• A. 10.4 kW
• B. 12.5 kW
• C. 15.0 kW
• D. 9.3 kW

Answer: (A)

The minimum calculated service load for an electric range installed in a dwelling unit is determined by the National Electrical Code (NEC) guidelines. For an electric range rated from 1 to 18 kW, the NEC specifies that the minimum load calculation is 10 kW. This figure takes into account the average usage patterns and ensures adequate supply for typical cooking needs in a residence, accounting for the likelihood of simultaneous use of multiple burners and ovens.

The choice reflecting 10.4 kW aligns with the NEC's requirements for properly sizing the service to prevent overloading and to ensure the safety and efficiency of the electrical system in a home kitchen. This calculation is critical in determining the capacity of the service entrance and the appropriate circuit breakers needed to handle the intended load safely.