Connect with us

Measuring Impedance of a wall socket

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

Scroll to continue with content
  1. JeffM

    JeffM Guest

    I'm not just looking...to 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 sci.electronics.design.
    ..
    ..
    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:
    http://www.cs.tut.fi/~jkorpela/usenet/xpost.html

    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!
    Rich
     
  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.
    mike

    --
    Return address is VALID but some sites block emails
    with links. Delete this sig when replying.
    ..
    Wanted, PCMCIA SCSI Card for HP m820 CDRW.
    FS 500MHz Tek DSOscilloscope TDS540 Make Offer
    Wanted 12" LCD for Compaq Armada 7770MT.
    Bunch of stuff For Sale and Wanted at the link below.
    MAKE THE OBVIOUS CHANGES TO THE LINK
    ht<removethis>tp://www.geocities.com/SiliconValley/Monitor/4710/
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-