Comparison of 2-Wire and 3-Wire DC Power Architectures

As AI workloads drive unprecedented increases in data center power demand, the industry is rethinking how electricity is delivered to the rack. This paper explores the advantages, trade-offs, and protection challenges of 2-wire and 3-wire DC power architectures, providing a quantitative comparison of performance, safety, fault behavior, and operational resilience. Through detailed analysis of grounding methods, fault scenarios, energy storage, and protection strategies, it offers practical insights for designing next-generation hyperscale and AI data centers. Discover which architecture is best suited to support the future of high-density digital infrastructure.