If she jumped to the next cable size up to handle the heat (let's say, 240mm²), the cable would be heavy, expensive, and difficult to bend around the tight corridor.

$$V_drop = \frac0.25 \times 200 \times 1501000 = 7.5 \text Volts$$

Finally, the Cost. 185mm² was expensive, but not as expensive as the 240mm² she might have panic-bought. And by moving from PVC to XLPE, she saved on installation labor because the sheathing was more flexible.

Elena, the lead electrical engineer at the newly constructed Azure Data Center, stared at the blackened remains of a 120mm² copper cable. It was supposed to power the secondary cooling loop. Instead, it had turned into a heating element, tripping the breaker and bringing the backup generators to a shuddering halt.

She re-ran the numbers for the 185mm² XLPE.

"Morning, Elena," said a voice from behind. It was Marcus, the project manager, holding a coffee cup that looked dangerously close to spilling. "The client is asking why their backup power turned into a backup sauna. I thought you oversized this run?"

Compare the cross-sectional areas (mm²) obtained from Current Carrying Capacity , Voltage Drop , and Short Circuit tests. Choose the largest value among them to ensure compliance with all constraints. 7. Practical Example: 3-Phase Motor