Specifications and dimensions of a 4-story data center power distribution box

A 4-story data center power distribution box is typically a modular, multi-tier PDU system designed to deliver high-capacity, redundant power to IT equipment, with dimensions and specifications varying by manufacturer but generally following standard rack or floor-mounted modular designs.

General Design and Structure

A 4-story PDU system in a data center is usually modular, with each “story” representing a separate tier or section of the distribution box. These tiers can be stacked vertically to optimize space and provide redundant power paths (Side A and Side B) for Tier III or Tier IV data centers . Each tier may include:

• Circuit breakers or fuses for branch protection
• Busbars or power rails for high-current distribution
• Monitoring and metering modules
• Surge protection and isolation switches
• Optional intelligent controllers for remote monitoring and management

Typical Dimensions

While exact dimensions depend on the manufacturer and power rating, modular PDUs for high-density data centers generally follow these ranges:

• Height per tier: 42U to 48U per rack section (~2 m per tier)
• Width: Standard 19-inch rack width (482.6 mm) or wider for high-capacity busbars
• Depth: 800–1200 mm to accommodate cabling and cooling
• Total height for 4 tiers: Approximately 8–9 meters if stacked vertically, though some designs use floor-mounted multi-compartment enclosures to reduce vertical height

Electrical Specifications

A 4-story PDU is designed to handle high IT loads, often in the range of 0.5 MW to 2 MW per cabinet, depending on redundancy and Tier classification . Key electrical features include:

• Input voltage: Typically 400/230 V AC for European or global data centers
• Redundancy: 2N or 2(N+1) configurations for Tier III/IV
• Monitoring: Real-time metering of voltage, current, and power factor
• Outlet types: High-density IEC C13/C19 or NEMA configurations, hot-swappable controllers, and intelligent monitoring for each tier
• Environmental tolerance: Operating temperatures up to 60°C (140°F) at full load, with integrated cooling airflow management

Modularity and Safety

• Each tier can be isolated for maintenance without disrupting the other tiers
• Physical separation between Side A and Side B ensures fault tolerance
• Integrated surge protection and circuit breakers protect both IT and non-IT loads
• Optional intelligent PDUs provide remote monitoring, environmental sensing, and access control

Installation Considerations

• Requires floor space for base support and cable management
• May include vertical cable managers and busway connections between tiers
• Designed to integrate with CRAC/CRAH cooling units and fire suppression systems
• Modular design allows for future expansion or replacement of individual tiers without full system downtime

Summary

A 4-story data center power distribution box is a high-capacity, modular PDU system designed for redundancy, monitoring, and scalability. While exact dimensions vary, a typical configuration uses standard rack widths, deep enclosures, and stacked tiers totaling several meters in height. Electrical capacity ranges from hundreds of kilowatts to multiple megawatts, with intelligent monitoring and environmental management to ensure continuous operation in Tier III/IV data centers .