Utility Rates, Grid, and Markets
A tariff is the filed set of rates, terms, conditions, riders, and service agreements governing utility service. Large-load data center economics can change materially depending on tariff class, demand ratchets, power factor provisions, interruptibility, and special-contract terms.
Special use permit is local approval for a use that is allowed only after discretionary review and conditions. Data centers may trigger special use review due to scale, utility infrastructure, noise, traffic, generators, water use, or community concerns.
Read definition →Uninterruptible Power Supply provides short-duration power conditioning and ride-through between utility events and generator availability. UPS topology, battery chemistry, runtime, efficiency, redundancy, and maintenance are central to data center reliability.
Read definition →Tier III is concurrently maintainable infrastructure: each capacity component and distribution path can be removed for planned work without affecting operations. It is a common target for enterprise and colocation facilities, but certification depends on detailed design and operations.
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