Deliver the Power

Between the power plant and the server rack sits the electrical distribution system — the transformers, switchgear, bus ducts, and protection equipment that step down voltage, route power, and ensure that a fault in one circuit doesn't cascade into a facility-wide outage. This is the layer most investors skip because it looks like commodity electrical equipment. It is not. Large power transformers are a 2-3 year lead time item with a global manufacturing base concentrated in fewer than a dozen factories. Custom medium-voltage switchgear takes 12-18 months. These timelines are now the pacing constraint on new data center energization.

Eaton Corporation is the dominant player. Their power distribution units, switchgear, UPS systems, and rack-level PDUs are installed in the majority of enterprise and hyperscale data centers in North America. Eaton's moat is integration: they provide the full electrical chain from utility interconnect to rack-level power, with monitoring software that gives operators real-time visibility into power consumption, efficiency, and fault detection. Their Brightlayer platform turns electrical distribution into a software-managed system.

ABB competes head-to-head with Eaton globally, with particular strength in medium-voltage switchgear and power transformers. ABB's electrification division supplies the transformers that step grid-level voltage (138kV-345kV) down to the medium voltage (13.8kV-34.5kV) used inside data center campuses, and their MV switchgear distributes power to individual buildings and halls. In markets outside North America, ABB often holds the lead position that Eaton holds domestically.

Hubbell Incorporated focuses on the interconnection and protection layer — the connectors, grounding systems, surge protection devices, and cable management that physically link the major electrical components together. In a 100MW data center, there are thousands of Hubbell connectors, lugs, and grounding points. These are low-glamor, high-criticality components: a single failed connector can take down a power bus serving hundreds of racks.

Powell Industries is the pure-play on custom-engineered switchgear and electrical enclosures. While Eaton and ABB serve the broad market, Powell specializes in complex, made-to-order power distribution systems for mission-critical facilities. Their custom switchgear is specified for applications where standard catalog products don't meet the reliability or density requirements — exactly the profile of AI data centers pushing past 50MW per building.

Honeywell's building automation and power management systems sit at the control layer — monitoring and optimizing the electrical distribution system in real time. Their Forge platform integrates power monitoring with cooling and building management, giving operators a unified view of facility performance. AZZ Inc provides galvanizing and metal coating services for the structural steel and enclosures that house electrical distribution equipment — a Tier 2 supplier to the entire layer. Woodward makes the generator control systems and voltage regulators that manage the interface between on-site generation (L22) and the electrical distribution system.

The structural insight: every megawatt of AI compute capacity requires corresponding electrical distribution infrastructure, and that infrastructure has its own supply chain bottleneck. You can order 10,000 GPUs and have them in 6 months. The transformer to power them takes 2-3 years.