What is the maximum TRU load?

• A. 100 amps
• B. 120 amps
• C. 140 amps
• D. 160 amps

Answer: (B)

The maximum TRU load is determined by the device’s rated current that its transformer and rectifier can carry continuously without overheating or triggering protection. If the TRU is designed for 120 amps, that is the highest current it can safely supply under normal conditions—the components (transformer, rectifiers, wiring, and cooling) are sized for that limit. Going beyond 120 amps would push the hardware past its thermal and electrical limits, risking overheating or trips. So 120 amps is the best answer. A lower value like 100 amps would be under the limit, while higher values like 140 or 160 amps would exceed what the unit is designed to safely handle.