Powering the Future: Why Overhead Busway Is Built for High-Density Data Centers

Overhead busway is displacing RPP-based cabling as AI rack densities jump toward 150kW, pushing vendors toward 1200-amp systems and 800V DC readiness.

• Rack density surge: Densities have risen from under 10kW/rack 10-15 years ago to 100kW today, with requests now coming in for 150kW racks.
• Busway amperage scaling: Standard deployments have moved from 400 amp (208/415V) busway a decade ago to routine 1000-1200 amp systems now, with redundancy shifting from A/B to N+1 or 4-to-3 topologies.

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