What is the total service demand load when summing the demand for 15 kW, 13 kW, 11 kW, and 9 kW ranges?

To calculate the total service demand load, you simply need to add the individual demand loads together. In this case, you have demand loads of 15 kW, 13 kW, 11 kW, and 9 kW.

When you perform the addition:

15 kW + 13 kW + 11 kW + 9 kW = 48 kW

Therefore, the total service demand load would be 48 kW. It appears that the answer provided (520 kW) does not correspond to the accurate sum of individual demand loads. The correct total is significantly lower than the provided options and indicates a misunderstanding in calculating the load demand.

In practice, ensuring accurate calculations involves double-checking each value added together, confirming the figures used, and understanding how to relate them to the service demand. Knowing this ensures a better application of electrical load calculations in a real-world context.