The 8 Ohm Load That Became 128 Ohms
Voltage scales with turns ratio, but impedance does not. An 8 ฮฉ load can appear as 128 ฮฉ through a 4:1 transformer.
Topic: Power Systems
The Feeder That Delivered 228 V Instead of 240 V
A feeder calculation can miss half the resistance when it counts only the outgoing conductor and forgets the return path.
The Motor Load That Drew More Current Than the kW Suggested
A kW-only three-phase current calculation can look correct and still undersize a feeder when power factor is below unity.