Provide a separate circuit breaker for each power cord.
Use dedicated AC breaker panels for all power circuits that supply power to the PDU. Breaker switches and breaker panels should not be shared with other high-powered equipment.
Balance the power load between AC supply branch circuits.
To protect the rack from electrical fluctuations and interruptions, you should have a dedicated power distribution system, an uninterruptible power supply (UPS), power-conditioning equipment, and lightning arresters.