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Question about electricity/electrical sockets

JasconiusJasconius sword criminalmad onlineRegistered User regular
edited December 2009 in Help / Advice Forum
If you have a power adapter plugged into a wall socket, but the power adapter is not plugged into the device it is intended for (cell phone, laptop, etc), does that power loop back into the grid? Do you pay for it?

Similarly, if you have a computer with, say, a 500w power supply, but the machine is running at a very low pace (say, just running DOS), does it still suck down 500w, or does it use less (and by "use", I mean, it doesn't show up on your bill).

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Posts

  • ChanusChanus Harbinger of the Spicy Rooster Apocalypse The Flames of a Thousand Collapsed StarsRegistered User, Moderator mod
    edited December 2009
    For the first, you are using some electricity... not a huge amount, but some.

    For the second, 500w is the capacity of the power source, not its constant running wattage.

    Chanus on
    Allegedly a voice of reason.
  • ProPatriaMoriProPatriaMori Registered User regular
    edited December 2009
    Yeah, something with a transformer on it plugged into a wall will have one of the loops energized. It'll draw some power but not a bundle.

    And 500W is some kind of rated wattage for a computer PSU. Higher-capacity ones tend to be more efficient at conversion overall, actually, though I don't know how good the correlation is. Plenty of computers idle at...what, 50W nowadays?

    ProPatriaMori on
  • UsagiUsagi Nah Registered User regular
    edited December 2009
    when something is rated 500W (like your computer) or 1000W (like your microwave, toaster or waffle iron) that's the peak draw, not the continuous

    Usagi on
  • Dunadan019Dunadan019 Registered User regular
    edited December 2009
    chargers will not generally pull wattage when connected. the device itself completes the circuit.

    your computer will pull about 20 watts when off.

    so says oprah...

    Dunadan019 on
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