Which of the following formulas deals with the calculation for continuous load and non-continuous load?

The first option correctly describes the relationship between continuous and non-continuous loads per electrical code standards.

In electrical design, continuous loads are defined as loads that are expected to run for three hours or more, while non-continuous loads are those expected to run for shorter durations. The formula presented accounts for both types of loads to ensure that the circuit can handle the total demand safely without exceeding its capacity. According to the code, the minimum ampacity should be greater than or equal to the sum of the non-continuous load plus 125% of the continuous load. This ensures that even during prolonged usage, the electrical system can manage the load without overheating or causing failures.

The other options relate more to calculations involving certain device ratings or adjustments, but they do not encapsulate the specific relationship between continuous and non-continuous loads as effectively as the chosen response. Each of those choices addresses different aspects of electrical systems, such as transformer ratings or minimum required capacities, rather than directly applying to the ongoing load calculation which is the focus here.