According to NEC Article 230, what must be included in service load calculations?

The correct response highlights the comprehensive nature of service load calculations as mandated by NEC Article 230. This article emphasizes the importance of accurately assessing all potential loads that a service may encounter. When calculating service loads, it is essential to consider not just the main lighting load but also all anticipated loads that could be connected to the electrical service. This includes both lighting and receptacle outlets, as well as any appliances that might draw power.

By incorporating all expected loads into service load calculations, it ensures that the installed electrical system has the capacity to handle peak usage, preventing overload conditions that could lead to safety hazards. This approach promotes a well-balanced and safe electrical system design. The requirement to account for complete load expectations reflects the NEC's focus on safety and reliability in electrical installations.

In contrast, limiting calculations to only specific loads or providing rough estimates could lead to underestimating the necessary capacity required for safe operation, potentially compromising the effectiveness and safety of the electrical service.