How do you design the electrical infrastructure for a Tier III data center?

Tier III data centers require concurrent maintainability with N+1 redundancy throughout. Design includes dual utility feeds with independent paths, redundant UPS systems (typically 2N configuration), redundant generators with automatic transfer, multiple distribution paths to each rack (A+B feeds), and static transfer switches for critical loads. Power density planning accounts for 10-20 kW/rack with scalability. Monitoring systems provide visibility into all components. Efficiency measures include high-efficiency UPS, economizer cooling, and intelligent PDUs.