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  2. Stepper motor - Wikipedia

    en.wikipedia.org/wiki/Stepper_motor

    A stepper motor A bipolar hybrid stepper motor. Brushed DC motors rotate continuously when DC voltage is applied to their terminals. The stepper motor is known for its property of converting a train of input pulses (typically square waves) into a precisely defined increment in the shaft’s rotational position.

  3. National Electrical Manufacturers Association - Wikipedia

    en.wikipedia.org/wiki/National_Electrical...

    The National Electrical Manufacturers Association (NEMA) [5] is the largest trade association of electrical equipment manufacturers in the United States. [6] Founded in 1926, it advocates for the industry and publishes standards for electrical products. Notably, the form of US household electrical outlets and plugs is specified by NEMA.

  4. Category:NEMA standards - Wikipedia

    en.wikipedia.org/wiki/Category:NEMA_standards

    Download as PDF; Printable version; In other projects Wikidata item; ... Pages in category "NEMA standards" The following 8 pages are in this category, out of 8 total.

  5. NEMA size - Wikipedia

    en.wikipedia.org/wiki/NEMA_size

    NEMA (National Electrical Manufacturers Association) contactors and motor starters are rated by sizes. These sizes are grouped by rated current and power . [ 1 ] [ 2 ]

  6. NEMA enclosure types - Wikipedia

    en.wikipedia.org/wiki/NEMA_enclosure_types

    Below is a list of NEMA enclosure types; these types are further defined in NEMA 250- Enclosures for Electrical Equipment. Each type specifies characteristics of an enclosure, but not, for example, a specific enclosure size. Note that higher numbers do not include the lower-numbered tests. For example, types 3, 4 and 6 are intended for outdoor ...

  7. IEC 60034 - Wikipedia

    en.wikipedia.org/wiki/IEC_60034

    IEC 60034-30 specifies energy-efficiency classes for single-speed, continuous duty(S1), three-phase, cage-induction motors with 2, 4 or 6 poles.

  8. Bipolar electric motor - Wikipedia

    en.wikipedia.org/wiki/Bipolar_electric_motor

    Bipolar toy motor of 1948. Note the three-pole rotor with a bipolar field. A bipolar electric motor is an electric motor with only two (hence bi-) poles to its stationary field. [1] They are an example of the simple brushed DC motor, with a commutator. This field may be generated by either a permanent magnet or a field coil.

  9. National Electrical Code - Wikipedia

    en.wikipedia.org/wiki/National_Electrical_Code

    NEMA connectors implement these requirements. The NEC also permits grounding-type receptacles in non-grounded wiring protected by a GFCI; this only applies when old non-grounded receptacles are replaced with grounded receptacles, and the new receptacles must be marked with 'No equipment ground' and 'GFCI Protected' .