Digital Realty Data Hall

Ashburn, Virginia

This data hall fit-out included the installation of five 3750kVA utility transformers, five 3MW
generators, five Generator switchboards and five UPS skid lineups, each consisting of a 4000A auto
transfer service switchboard, 3000A UPS switchboard, and two 1000KVA UPS lineups. Eight miles of
feeder MC cable were installed in three tiers of cable tray, three trays wide from the gear lineups to
the forty PDUs, fifty CRAC units, generator panels, UPS panels, and various other house panels. Two
miles of 1000mcm XHHW were installed in cable bus from the generators and utility transformers to
the UPS skid lineups. The project schedule allowed thirteen weeks from mobilization to start of
commissioning. Due to delays in procurement of the mechanical equipment, the installation of the
feeder MC cable was delayed four weeks. Despite this, the original project milestones were

This project received a 2019 Washington Building Congress Craftsmanship Award for Power Generation, Distribution and Switchgear.