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2. Three-phase electric power - Wikipedia

   en.wikipedia.org/wiki/Three-phase_electric_power

   A three-wire three-phase circuit is usually more economical than an equivalent two-wire single-phase circuit at the same line-to-ground voltage because it uses less conductor material to transmit a given amount of electrical power. [3] Three-phase power is mainly used directly to power large induction motors, other electric motors and other ...

3. IEC 60309 - Wikipedia

   en.wikipedia.org/wiki/IEC_60309

   The standard includes preferred current ratings and wire gauges for both International (deemed Series I) and North American (deemed Series II) applications. Series I preferred current ratings (in amps) are: 16, 32, 63, 125, 250, 400, 630 and 800, with wire gauges specified as mm 2.

4. IEC metric screw sized connectors - Wikipedia

   en.wikipedia.org/wiki/IEC_metric_screw_sized...

   M12 A-coded 5-pin connector: For each connector size, the A-coding is the inspecific pinout variant and the only variant defined in varying numbers of pins. Ethernet cable with an M12 X-coded connector in one end and a modular connector in the other.

5. NEMA size - Wikipedia

   en.wikipedia.org/wiki/NEMA_size

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6. Wire gauge - Wikipedia

   en.wikipedia.org/wiki/Wire_gauge

   In some applications wire sizes are specified as the cross sectional area of the wire, usually in mm 2. Advantages of this system include the ability to readily calculate the physical dimensions or weight of wire, ability to take account of non-circular wire, and ease of calculation of electrical properties.

7. Industrial and multiphase power plugs and sockets - Wikipedia

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

   Current ratings available include 16 A, 32 A, 63 A, 125 A and 200 A. Voltage rating and other characteristics are represented by a colour code (in three-phase plugs the stated voltage is the phase-phase voltage, not the phase-neutral voltage). Plugs have the earth pin of a larger diameter than the others, and located in different places ...