Mr. Volt pulled out a notepad. "Maximum Demand is the single highest amount of power your bakery needs at any one moment, measured in kilowatts (kW) or amperes (A). The electricity grid doesn't care about your total machines. It cares about the peak moment when you ask for the most power at once. Exceed that, and the fuse sacrifices itself to save the wires."

In the bustling city of Ampereville, there was a famous bakery called "The Joule Loaf." It was run by a kind but stressed-out baker named Elara.

Elara looked confused. "Maximum Demand? What is that?"

That was her Maximum Demand. It was the highest 30-minute average power draw of the day. The fuse blew because 12.3 kW > 10 kW. "Calculating this manually every day is tedious," Elara complained.

Mr. Volt smiled. "That's why engineers use the . Not every device runs at full power at the same time. You can use standard rules of thumb."