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  2. Date nail - Wikipedia

    en.wikipedia.org/wiki/Date_nail

    Another example is the Milwaukee Road "R08" nail, where the "R" is an unknown treatment or type of wood, and the numbers indicate the year it was installed. [3] Date nail use has dropped dramatically since the mid-20th century and the advent of more modern maintenance of way equipment. Date nails on American railroads were phased out in the 1970s.

  3. Ergon Energy - Wikipedia

    en.wikipedia.org/wiki/Ergon_Energy

    Ergon Energy Network is a subsidiary of Energy Queensland Limited, which is itself a Queensland Government-owned company. [2] Ergon distributes electricity to approximately 763,000 customers across the Australian state of Queensland (excluding South East Queensland) through a distribution network which is regulated by the Australian Energy Regulator (AER).

  4. Energex - Wikipedia

    en.wikipedia.org/wiki/Energex

    Energex is an Australian-based and wholly Queensland Government-owned electricity company that distributes power to 1.5 million homes and businesses across the region of South East Queensland. The boundaries of the company’s distribution area stretch from Coolangatta in the south to Gympie in the north and as far west as the foothills of the ...

  5. Polarity symbols - Wikipedia

    en.wikipedia.org/wiki/Polarity_symbols

    Diagram showing positive tip polarity on the left and negative tip polarity on the right. To read diagram: The center positive drawing on the left indicates that the center (also known as the tip) of the output plug is positive (+) and the barrel (ring) of the output plug is negative (−).

  6. Single-wire earth return - Wikipedia

    en.wikipedia.org/wiki/Single-wire_earth_return

    Conventional 2-wire or 3-wire distribution lines have a higher power transfer capacity, but can require 7 poles per kilometre (12 poles per mile), with spans of 100 to 150 metres (110 to 160 yards). SWER's high line voltage and low current also permits the use of low-cost galvanized steel wire (historically, No. 8 fence wire). [ 9 ]

  7. NEMA connector - Wikipedia

    en.wikipedia.org/wiki/NEMA_connector

    NEMA 1-15P (two-pole, no ground) and NEMA 5-15P (two-pole with ground pin) plugs are used on common domestic electrical equipment, and NEMA 5-15R is the standard 15-ampere electric receptacle (outlet) found in the United States, and under relevant national standards, in Canada (CSA C22.2 No. 42 [1]), Mexico (NMX-J-163-ANCE) and Japan (JIS C 8303).

  8. Military Grid Reference System - Wikipedia

    en.wikipedia.org/wiki/Military_Grid_Reference_System

    Figure 3. The MGRS grid around the South Pole. Figure 4. The MGRS grid around the North Pole. In the polar regions, a different convention is used. [7] South of 80°S, UPS South (Universal Polar Stereographic) is used instead of a UTM projection. The west half-circle forms a grid zone with designation A; the east half-circle forms one with ...

  9. Industrial and multiphase power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/Industrial_and_multiphase...

    The normal technical term (in both British and International English) for an AC power socket is socket-outlet, [4] but in non-technical common use a number of other terms are used. In British English the general term is socket, but there are numerous common alternatives, including power point , [ 5 ] plug socket , [ 6 ] wall socket , [ 7 ] and ...

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