| Factor | Why it matters | |--------|----------------| | | Higher ambient = less heat dissipation | | Altitude | Thinner air = poorer cooling | | Grouping / Bundling | Wires close together trap heat | | Duty cycle | Intermittent vs. continuous operation | | Aging | Old insulation or contacts degrade | | Voltage | Overvoltage stresses semiconductors |
In electrical engineering, derating factors prevent wiring from overheating and causing fires. Standard ampacity tables assume ideal conditions—typically an ambient temperature of 30°C (86°F) and no more than three current-carrying conductors bundled together. derating factors
This is the most common factor. Most materials lose strength or change properties as temperature rises. | Factor | Why it matters | |--------|----------------|
Military and aerospace standards are strict. derating factors