What is the purpose of using a load calculator in design?

Using a load calculator in design primarily serves the purpose of ensuring that the proposed electrical system can safely support the expected loads. This is crucial because electrical systems must be designed to handle the maximum load they may experience during operation without exceeding safety limits or causing potential hazards such as overheating or equipment failure.

By accurately calculating the load requirements, designers can determine the appropriate size and rating for conductors, circuit breakers, and other components, ensuring that the system operates efficiently and safely. This aspect highlights the importance of load calculations in maintaining electrical safety standards and compliance with relevant codes and regulations.

Other aspects of the project, like installation time, cost calculations, and conductor types, are indeed relevant to the overall planning and execution of an electrical design. However, the primary focus and critical function served by the load calculator is centered on load management, making option B the most suitable and essential purpose of using this tool in the design process.