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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Interconnection and Studies
Backfeed
Backfeed is temporary or permanent energization of equipment from a source that may not be the normal operating source. It matters during construction, testing, commissioning, and safety procedures.
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Resource adequacy
Resource adequacy is the ability of the power system to have enough supply, imports, demand response, and reserves to meet expected demand plus reliability margins. AI load growth has made resource adequacy a core large-load planning issue.
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Tier I is basic capacity infrastructure with limited redundancy and likely site-wide shutdowns for maintenance or repair. It is usually not suitable for mission-critical hyperscale or AI loads without additional mitigations.
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