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  2. Orders of magnitude (current) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(current)

    10 or 20 A 230 V AC, Europe common domestic circuit breaker rating 15 or 20 A 120 V AC, United States, Canada and Mexico domestic circuit breaker rating 16.6 A 120 V AC, toaster, kettle (2 kW) 20 A 230 V AC, Immersion heater (4.6 kW) 24 A 12V DC, PC, High-performance graphics card (288W) 38.3 A 120 V AC, Immersion heater (4.6 kW) 10 2: 80–160 A

  3. Dynamic line rating for electric utilities - Wikipedia

    en.wikipedia.org/wiki/Dynamic_line_rating_for...

    These frames can then be processed for display and calculations by the utility energy management system or distribution management system. Short-term network operation decisions are based on optimized rating information, as well as load-flow calculations and economic dispatch scenarios.

  4. Per-unit system - Wikipedia

    en.wikipedia.org/wiki/Per-unit_system

    In the power systems analysis field of electrical engineering, a per-unit system is the expression of system quantities as fractions of a defined base unit quantity. . Calculations are simplified because quantities expressed as per-unit do not change when they are referred from one side of a transformer to t

  5. Ampacity - Wikipedia

    en.wikipedia.org/wiki/Ampacity

    Electrical code rules will give ratings for wiring where short-term loads are present, for example, in a hoisting motor. For systems such as underground power transmission cables, evaluation of the short-term over-load capacity of the cable system requires a detailed analysis of the cable's thermal environment and an evaluation of the ...

  6. Prospective short-circuit current - Wikipedia

    en.wikipedia.org/wiki/Prospective_short-circuit...

    The short-circuit current should be around 20 times the rating of the circuit to ensure the branch circuit protection clears a fault quickly. Quick disconnecting is needed, because during a line-to-ground short circuit the grounding pin potential on the power outlet can rise relative to the local earth (concrete floor, water pipe etc.) to a ...

  7. Power rating - Wikipedia

    en.wikipedia.org/wiki/Power_rating

    For electrical motors, a similar kind of information is conveyed by the service factor, which is a multiplier that, when applied to the rated output power, gives the power level a motor can sustain for shorter periods of time. The service factor is typically in the 1.15-1.4 range, with the figure being lower for higher-power motors.

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  9. NEMA connector - Wikipedia

    en.wikipedia.org/wiki/NEMA_connector

    L6-20 connectors provide a maximum of 20 amperes and are commonly found in power distribution units (PDUs) used in the information technology sector. Most often, these connectors can be found in server rooms and data centers where the connectors are used to power equipment such as servers, backup systems and UPS units.