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  1. #1
    Join Date
    Nov 2011
    Location
    Charleston, Wv.
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    1,489

    ELI the ICE Man!

    I consider electrical theory to be one of my weak points, and am attempting to correct this. I've heard this term (ELI the ICE man), but have never had it fully explained. I understand it is a short way to remember voltage leading current in circuits or lagging in some circuits.

    Anyone know the correct interpretation?

    guess I need to pick up a copy of the Ugly book too!!

  2. #2
    Join Date
    Jan 2001
    Location
    Nebraska
    Posts
    319
    ELI where E= Voltage I=Current L= inductance so voltage leads the current in an inductor or coil.

    ICE Where E= Voltage I=Current C = Capacitance so current leads the Voltage in a capacitive circuit.

    PS. When Capacitance and inductance are operating in an AC circuit.
    Last edited by Tom R; 03-04-2012 at 01:42 PM. Reason: add PS

  3. #3
    Join Date
    Jul 2009
    Location
    new york
    Posts
    658
    Yes since know one can really answer the question it is the voltage leads the current in both capacitive and inductive circuits. Very easy suprised no one could help with this easy answer.

  4. #4
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,545
    Looks like I've got some typing to do when I get home tonight...
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  5. #5
    Join Date
    Jul 2009
    Location
    new york
    Posts
    658
    Quote Originally Posted by timebuilder View Post
    Looks like I've got some typing to do when I get home tonight...
    i meant voltage lead the current in ind and current leads in cap

  6. #6
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,545
    I never used a mnemonic to remember this relationship. Instead, I thought about what happens.

    For example, in an inductor, the flow of current creates counter emf, which acts as a drag on current flow. So, in inductors OR circuits with a predominance of inductive reactance, current LAGS (or, "happens after") voltage.

    With a capacitor, the current flows readily into an empty capacitor. As it fills the cap, the voltage increases across the two terminals due to the increasing stored charge. So, in a capacitor or a circuit that is predominantly capacitive, current LEADS (or, "happens before") voltage.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  7. #7
    Join Date
    Sep 2007
    Location
    Newark, Ohio
    Posts
    112
    ELI is cold as ICE

  8. #8
    Join Date
    Feb 2004
    Location
    New Mexico
    Posts
    5,523
    We won't even mention how to remember resistor color codes. Que' No!'
    Tracers work both ways.

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