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Measuring Impedance of a wall socket

Discussion in 'Electronic Basics' started by JeffM, Jul 29, 2005.

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  1. JeffM

    JeffM Guest

    I'm not just understand the concept.
    Note1: When posting the same question to multiple groups,
    pit ALL the groups on the Subject line.
    This is called cross-posting.

    Note2: This is hardly a proper question for
    Measure the circuit unloaded, then loaded.
    Calculate the voltage divider.

    View in monospaced font like Courier.

    maybe a few ohms

    \ 10Mohn
    / instrument

    maybe a few ohms

    | |
    / /
    \ known \ 10Mohm
    / load / instrument
    \ \
  2. Hi, I was wondering if anyone could help me with a curious question. How
    would one go about measuring the impedance of a wall socket? Assuming it is
    120V, of course. I'm not just looking for a formula but rather to
    understand the concept. Any websites or other resources would be
    appreciated. Thanks in advance.
  3. Rich Grise

    Rich Grise Guest

    Don't multi-post. If you're posting the same question to more than one
    group, cross-post. To crosspost, just put the names of all of the NGs
    that you're crossposting to in the "newsgroups" header field.

    Well, this guy explains it better than I can:

    And, in answer to your question, in theory, the impedance of a wall
    outlet should be zero. To measure it, stick a voltmeter across the
    mains, and turn on a light. If the voltage changes, you have an
    impedance that shouldn't be there.

    Good Luck!
  4. mike

    mike Guest

    I tried your experiment.
    I got 117.9V with the light off and 117.2 with it on.
    Should I start ripping out my defective wiring?
    FWIW there ain't no such thing as zero.

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