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2. Three-prong adaptor - Wikipedia

   en.wikipedia.org/wiki/Three-prong_adaptor

   Three-prong plugs do not fit into the older, two-prong receptacles. [7] When used as intended, the ground pin of the 3-wire receptacle is to be connected to a grounded cover screw, or to an external ground. In 1969, Underwriters Laboratories mandated three-prong plugs on major appliances for safety. [7]

3. H-bridge - Wikipedia

   en.wikipedia.org/wiki/H-bridge

   One way to build an H-bridge is to use an array of relays from a relay board. [3] A "double pole double throw" (DPDT) relay can generally achieve the same electrical functionality as an H-bridge (considering the usual function of the device). However a semiconductor-based H-bridge would be preferable to the relay where a smaller physical size ...

4. DIN 72552 - Wikipedia

   en.wikipedia.org/wiki/DIN_72552

   from 2nd battery and 12/24 V relay: 31 return to battery- or direct to ground 31a return to battery- 12/24 V relay 31b return to battery- or ground through switch 85d 31c return to battery- 12/24 V relay 31, 31a Electric motors; 32 return 31 33 main terminal (swap of 32 and 33 is possible) 30 33a limit 33b field 54e 33f 2. slow rpm: 33g 3. slow ...

5. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   As an example, the 5-15R is the common 125 V two-pole, three-wire receptacle rated for 15 A. The L5-15R, while sharing the same electrical rating, is a locking design that is not physically compatible with the straight-blade 5-15 design. The 5-30R has the same two-pole, three-wire configuration and 125 V rating, but is rated for 30 A.

6. Polarity (mutual inductance) - Wikipedia

   en.wikipedia.org/wiki/Polarity_(mutual_inductance)

   In the "subtractive" arrangement, the H1 and X1 terminals are adjacent, and the voltage measured between H2 and X2 would be the difference of the high voltage and low voltage windings. [3] Pole mounted distribution transformers are manufactured with additive polarity, while instrument transformers are made with subtractive polarity.

7. AS/NZS 3112 - Wikipedia

   en.wikipedia.org/wiki/AS/NZS_3112

   The pins are arranged at 120° angles around a common midpoint, with the active and neutral centred 7.92 mm (5 ⁄ 16 in) from the midpoint, and the earth pin centred 10.31 mm (3 ⁄ 8 in) away. [5] A standard socket-outlet provides a nominal RMS voltage of 230 volts [2] at a maximum of 10 amps and always includes an earth connection ...

8. Anderson Powerpole - Wikipedia

   en.wikipedia.org/wiki/Anderson_Powerpole

   This is an accepted version of this page This is the latest accepted revision, reviewed on 4 October 2024. Family of electrical connectors Anderson Powerpole Anderson Powerpole 15/30/45 ampere housings and contacts (front view) Type Electrical connector The Anderson Powerpole is a family of electrical connectors by Anderson Power Products (APP), although plug compatible connectors are now ...

9. Rotor (electric) - Wikipedia

   en.wikipedia.org/wiki/Rotor_(electric)

   A salient pole rotor is built upon a stack of "star shaped" steel laminations, typically with 2 or 3 or 4 or 6, maybe even 18 or more "radial prongs" sticking out from the middle, each of which is wound with copper wire to form a discrete outward facing electromagnet pole. The inward facing ends of each prong are magnetically grounded into the ...