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  2. Litz wire - Wikipedia

    en.wikipedia.org/wiki/Litz_wire

    Litz wire is used to make inductors and transformers, especially for high frequency applications where the skin effect is more pronounced and proximity effect can be an even more severe problem. Litz wire is one kind of stranded wire , but, in this case, the reason for its use is not the usual one of avoiding complete wire breakage due to ...

  3. 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.

  4. List of IEC standards - Wikipedia

    en.wikipedia.org/wiki/List_of_IEC_standards

    IEC 62128 Railway applications – Fixed installations – Electrical safety, earthing and the return circuit; IEC 62129 Calibration of wavelength/optical frequency measurement instruments; IEC TR 62130 Climatic field data including validation; IEC TR 62131 Environmental conditions – Vibration and shock of electrotechnical equipment

  5. BS 7671 - Wikipedia

    en.wikipedia.org/wiki/BS_7671

    Entitled ‘Rules and Regulations for the prevention of Fire Risks Arising from Electric Lighting’, and known as the "Wiring Rules". Two core cable, line and neutral, no earth. Protection was a re-wirable fuse. 1888: 2nd: IEE: Entitled 'Wiring Rules & Regulations in Buildings. [verification needed] 1897: 3rd: IEE

  6. Synchronization (alternating current) - Wikipedia

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

    The source (generator or sub-network) must have equal root-mean-square voltage, frequency, phase sequence, phase angle, and waveform to that of the system to which it is being synchronized. [1] Waveform and phase sequence are fixed by the construction of the generator and its connections to the system.

  7. Catholic nun arrested for bringing mafia messages to prisoners

    www.aol.com/catholic-nun-arrested-bringing-mafia...

    An Italian nun was arrested Thursday as part of a long investigation that led to the arrests of 25 suspects and the seizure of over 1,800,000 euros.

  8. Mains electricity - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity

    The voltage and frequency of electric power differs between regions. In much of the world, a voltage (nominally) of 230 volts and frequency of 50 Hz is used. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other combinations exist, for example, 230 V at 60 Hz.

  9. Drinking Coffee Every Day Could Add Up to 2 Years to Your Life

    www.aol.com/drinking-coffee-every-day-could...

    Drinking coffee could extend your life up to two years, new research finds. Regular coffee consumption was found to be associated with increased health span (time spent living free from serious ...