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  2. Electrical contact - Wikipedia

    en.wikipedia.org/wiki/Electrical_contact

    When the contacts touch, the switch is closed; when the contacts are separated, the switch is open. The gap must be an insulating medium, such as air, vacuum, oil, SF 6. Contacts may be operated by humans in push-buttons and switches, by mechanical pressure in sensors or machine cams, and electromechanically in relays.

  3. Wiring diagram - Wikipedia

    en.wikipedia.org/wiki/Wiring_diagram

    An automotive wiring diagram, showing useful information such as crimp connection locations and wire colors. These details may not be so easily found on a more schematic drawing. A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the ...

  4. Multiway switching - Wikipedia

    en.wikipedia.org/wiki/Multiway_switching

    In building wiring, multiway switching is the interconnection of two or more electrical switches to control an electrical load from more than one location.A common application is in lighting, where it allows the control of lamps from multiple locations, for example in a hallway, stairwell, or large room.

  5. Electrical connector - Wikipedia

    en.wikipedia.org/wiki/Electrical_connector

    Front release contacts are released from the front (contact side) of the connector, and removed from the rear. The removal tool engages with the front portion of the contact and pushes it through to the back of the connector. Rear release contacts are released and removed from the rear (wire side) of the connector. The removal tool releases the ...

  6. DIN 72552 - Wikipedia

    en.wikipedia.org/wiki/DIN_72552

    multi position switch, in 83a out position 1 83b out position 2 Relay; 85 relay coil - Important if relay coil has flyback diode in parallel 86 relay coil + Important if relay coil has diode in parallel Relay contacts 87 common contact 30/51 87a normally closed contact 87b normally open contact 88 common contact 2 30/51 (relay) 88a

  7. Modular connector - Wikipedia

    en.wikipedia.org/wiki/Modular_connector

    When viewed head-on with the retention mechanism on the bottom, jacks will have contact position number 1 on the left and plugs will have it on the right. Contacts are numbered by the contact position. For example, on a six-position, two-contact plug, where the outermost four positions do not have contacts, the two contacts are numbered 3 and 4.

  8. Contact protection - Wikipedia

    en.wikipedia.org/wiki/Contact_protection

    Every time the contacts of an electromechanical switch, relay or contactor are opened or closed, there is a certain amount of contact wear. If the contact is cycling without electricity (dry), the impact of the contact electrodes a slightly deformed by the resulting cold forging. [1]

  9. IDC (electrical connector) - Wikipedia

    en.wikipedia.org/wiki/IDC_(electrical_connector)

    An insulation-displacement contact (IDC), also known as insulation-piercing contact (IPC), is an electrical connector designed to be connected to the conductor(s) of an insulated cable by a connection process which forces a selectively sharpened blade or blades through the insulation, bypassing the need to strip the conductors of insulation ...

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