Power Fundamentals
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.
Congestion occurs when transmission limits prevent the lowest-cost generation from serving load freely. It can raise local prices, create interconnection upgrade needs, and signal grid bottlenecks near attractive data center markets.
Read definition →An arc flash study estimates incident energy from electrical faults and supports worker-safety labeling and procedures. It is not a casual calculator item; it requires qualified engineering analysis and current system data.
Read definition →An energy charge bills total consumption, usually in dollars per kWh. It captures volume of electricity consumed, while demand charges capture the system capacity needed to serve the customer's peak.
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