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  2. Doorbell - Wikipedia

    en.wikipedia.org/wiki/Doorbell

    Pressing the doorbell button, a single-pole, single-throw (SPST) pushbutton switch momentarily closes the doorbell circuit. One terminal of this button is wired to a terminal on a transformer. A doorbell transformer steps down the 120 or 240-volt AC electrical power to a lower voltage, typically 6 to 24 volts. The transformer's other terminal ...

  3. Electric bell - Wikipedia

    en.wikipedia.org/wiki/Electric_bell

    In residential applications, a small bell-ringing transformer is usually used to power the doorbell circuit. So that bell circuits can be made with low-cost wiring methods, bell signal circuits are limited in voltage and power rating. [3]

  4. Electrical wiring in North America - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_North...

    An outlet is defined by the NEC as "a point in the wiring system at which current is taken to utilization equipment". [1] This definition includes receptacles, lighting, motors, etc. Ordinary switches control but do not consume electricity, and therefore are not defined as outlets in this sense.

  5. Standby power - Wikipedia

    en.wikipedia.org/wiki/Standby_power

    Transformer-powered doorbells; Programmable thermostats; Motion sensors, light sensors, built-in timers and automatic sprinklers ... or that turn other outlets on or ...

  6. Want a free video doorbell? City Attorney's office offering ...

    www.aol.com/want-free-video-doorbell-city...

    Columbus City Attorney Zach Klein's office is offering a lottery for 700 free video doorbells to residents in high crime ZIP codes.

  7. Power lines, hikers, arson: What might have sparked LA's ...

    www.aol.com/power-lines-hikers-arson-inside...

    A Ring doorbell camera on his home captured the moment his wife came to pull him outside. "Hey babe, I need you to come out here right now," she tells him as her hair whips in the fierce winds ...

  8. Electrical wiring - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring

    Electrical symbols for wiring [vague]. Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets, and light fittings in a structure.

  9. Mercury switch - Wikipedia

    en.wikipedia.org/wiki/Mercury_switch

    A Single-Pole, Single-Throw (SPST) mercury switch on millimetre graph paper, device length approximately 1.5 cm Another mercury switch design. A mercury switch is an electrical switch that opens and closes a circuit when a small amount of the liquid metal mercury connects metal electrodes to close the circuit.

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