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  2. Ancillary services (electric power) - Wikipedia

    en.wikipedia.org/wiki/Ancillary_services...

    Frequency control refers to the need to ensure that the grid frequency stays within a specific range of the nominal frequency. Mismatch between electricity generation and demand causes variations in frequency, so control services are required to bring the frequency back to its nominal value and ensure it does not vary out of range. [3]

  3. Home wiring - Wikipedia

    en.wikipedia.org/wiki/Home_wiring

    Telephone wiring is required between the telephone company's service entrance and locations throughout the home. Often a home will have telephone outlets in the kitchen, study, living room or bedrooms for convenience. Telephone company regulations may limit the total number of telephones that can be in use at one time.

  4. Power system operations and control - Wikipedia

    en.wikipedia.org/wiki/Power_system_operations...

    induction motors self-adjust (lower frequency reduces the energy use); under-frequency relays disconnect interruptible loads; ancillary services are engaged (load is reduced as procured via reliability services contracts). Another term commonly used for the primary control is frequency response (or "beta").

  5. Synchronization (alternating current) - Wikipedia

    en.wikipedia.org/wiki/Synchronization...

    Waveform and phase sequence are fixed by the construction of the generator and its connections to the system. During installation of a generator, careful checks are made to ensure the generator terminals and all control wiring is correct so that the order of phases (phase sequence) matches the system.

  6. Load management - Wikipedia

    en.wikipedia.org/wiki/Load_management

    Since electrical energy is a form of energy that cannot be effectively stored in bulk, it must be generated, distributed, and consumed immediately. When the load on a system approaches the maximum generating capacity, network operators must either find additional supplies of energy or find ways to curtail the load, hence load management.

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  8. Electrical wiring in North America - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_North...

    Special wiring rules apply to wet or corrosive locations, [13] and to locations which present an explosion hazard. [14] Wiring materials for use in the United States must generally be made and tested to product standards set by NEMA and Underwriters Laboratories (UL) and must bear approval marks such as those set by UL.

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