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  2. Wedge base - Wikipedia

    en.wikipedia.org/wiki/Wedge_base

    Philips-branded sets and most store brands use an offset, with the longer anode (positive lead) being lower and the shorter cathode (negative lead) being higher on the wedge base. GE-branded sets (no longer actually made by GE) use a larger round base with a tab that sticks out to one side.

  3. MC4 connector - Wikipedia

    en.wikipedia.org/wiki/MC4_connector

    MC4 connectors are successors of the MC3 Connectors, which were developed by Multi-Contact in 1996. MC3 is the abbreviation of Multi-Contact and its size 3mm PV connector with 3 mm contact pin. MC3 had certification ratings of (1000VIEC/600V UL) and 30A (10AWG PV Cable). The MC3 connectors were discontinued in 2016.

  4. Contact resistance - Wikipedia

    en.wikipedia.org/wiki/Contact_resistance

    When a conductor has spatial dimensions close to /, where is Fermi wavevector of the conducting material, Ohm's law does not hold anymore. These small devices are called quantum point contacts . Their conductance must be an integer multiple of the value 2 e 2 / h {\displaystyle 2e^{2}/h} , where e {\displaystyle e} is the elementary charge and ...

  5. Cathodic protection - Wikipedia

    en.wikipedia.org/wiki/Cathodic_protection

    Corrosion control professionals find they do not work. [48] There is no peer reviewed scientific testing and validation supporting the use of the devices. In 1996 the FTC ordered David McCready, a person that sold devices claiming to protect cars from corrosion, to pay restitution and banned the names "Rust Buster" and "Rust Evader." [49]

  6. Electrical connector - Wikipedia

    en.wikipedia.org/wiki/Electrical_connector

    Connectors are purely passive components – that is, they do not enhance the function of a circuit – so connectors should affect the function of a circuit as little as possible. Insecure mounting of connectors (primarily chassis-mounted) can contribute significantly to the risk of failure, especially when subjected to extreme shock or ...

  7. Electrical contact - Wikipedia

    en.wikipedia.org/wiki/Electrical_contact

    Contact force or pressure increases the size of the a-spot which decreases the constriction resistance and the electrical contact resistance. [11] When the size of contacting asperities becomes larger than the mean free path of electrons, Holm-type contacts become the dominant transport mechanism, resulting in a relatively low contact ...

  8. SAE J1772 - Wikipedia

    en.wikipedia.org/wiki/SAE_J1772

    SAE J1772, also known as a J plug or Type 1 connector after its international standard, IEC 62196 Type 1, is a North American standard for electrical connectors for electric vehicles maintained by SAE International under the formal title "SAE Surface Vehicle Recommended Practice J1772, SAE Electric Vehicle Conductive Charge Coupler".

  9. Pogo pin - Wikipedia

    en.wikipedia.org/wiki/Pogo_pin

    Variety of loose pogo pins and pogo pins in 3-pin assembly holders and with Pick and Place caps Sectional drawing of a pogo pin, showing the plunger, barrel, and spring. A pogo pin or spring-loaded pin is a type of electrical connector mechanism with spring plungers that is used in many modern electronic applications and in the electronics testing industry. [1]