Rack Power Calculator

Calculate power requirements for data center equipment racks.

Total Equipment Power (Watts) Sum of all equipment nameplate or measured power

Supply Voltage

Phase Configuration

Power Factor

Redundancy (N+1, 2N, etc.)

Target Circuit Loading (%) Industry standard is 80% max for continuous loads

Common PDU Ratings

PDU Type	Voltage	Capacity
Basic 120V/20A	120V 1φ	1.9 kW
Basic 120V/30A	120V 1φ	2.9 kW
Metered 208V/30A	208V 1φ	5.0 kW
Metered 208V/30A 3φ	208V 3φ	8.6 kW
High-density 208V/60A	208V 3φ	17.3 kW

Power Planning Best Practices

Capacity Planning

Size circuits for 80% maximum continuous load
Plan for growth - leave 20-30% headroom
Consider peak vs. average power
Account for UPS efficiency losses (5-10%)

Redundancy Guidelines

N: No redundancy (single feed)
N+1: Each feed sized for full load
2N: Fully redundant, dual-corded
2N+1: Maximum redundancy