Amps
Ampere is the unit of current. Amps are useful for rack, branch-circuit, feeder, and switchgear sizing, but the formula changes between DC, single-phase AC, and three-phase AC.
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Power Fundamentals
Transformer
A transformer changes AC voltage from one level to another and is a core bottleneck for large-load service. Transformer ratings, impedance, cooling class, lead time, losses, redundancy, and fault-current contribution all matter for data center feasibility.
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Powered shell
Powered shell is a partially completed data center building or structure with major power and connectivity provisions but without the full tenant-specific interior fit-out. It can accelerate delivery if power is real, but users must inspect what equipment, approvals, and capacity are actually included.
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Conditional use permit is similar to special use permit and authorizes a use subject to conditions designed to address local impacts. Terminology varies by jurisdiction, so the local code controls.
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