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My understanding (audio background) is that high impedance means the excact same as high resistance.

As far as power distribution goes, what is the difference between impedance and resistance ?

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My understanding (audio background) is that high impedance means the excact same as high resistance.

As far as power distribution goes, what is the difference between impedance and resistance ?

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31,081 Posts

Impedance is an electrical phenomena that is caused by AC circuits.electric resistance - a material's opposition to the flow of electric current; measured in ohms

http://www.princeton.edu/~achaney/tmve/wiki100k/docs/Electrical_impedance.htmlElectrical impedance, or simply impedance, describes a measure of opposition to alternating current (AC). Electrical impedance extends the concept of resistance to AC circuits, describing not only the relative amplitudes of the voltage and current, but also the relative phases. When the circuit is driven with direct current (DC) there is no distinction between impedance and resistance; the latter can be thought of as impedance with zero phase angle.

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That response from backstay was almost as quick as a GFCI that noticed some more current in the neut. This forum rules !

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1,948 Posts

Close. How about Z=square root of [R squared + (Xl-Xc)squared]Z=R+Xl+Xc

I couldn't figure out how to do the math symbols on this keyboard

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If that is a picture of your twin you shouldn't receive much

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3,109 Posts

Houston..we have a problem!!!Look past the obvious. :laughing:

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creepy:laughing:Houston..we have a problem!!!

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:thumbup::laughing:Houston..we have a problem!!!

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A steel conduit has greater DC resistance to currrent than a copper bonding wiire inside the pipe but if it is carrying a fault the current will still split nearly 50/50. If you put the copper bond wire outside of the pipe the load wires are in then the fault current prefers the raceway more like 10/90 than 50/50.

In both cases the DC resistance was not the best predictor of current path. It is the magnetic field that increased the impedance on the external bond wire. The resistance of the wire stayed the same.

Because impedance is dynamic I am pretty sure the trade schools only use resistance because it is easier to teach and for the most part we don't solve impedance problems as electricians.

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That's freaking hilarious, because I really didn't notice the face. Proof that a woman with an awesome rack can get away with anything. :laughing:Look past the obvious. :laughing:

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so would you still do herLook past the obvious. :laughing:

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Well thats not really accurate either, but I was trying to keep it simple for the new guy. Just talking about circuit impedance complex numbers are usually used where Z= R +jZ , phasors can also be used.bkmichael65 said:Close. How about Z=square root of [R squared + (Xl-Xc)squared]

I couldn't figure out how to do the math symbols on this keyboard

Your formula is a simplified version of a much more complex device impedance formula that I won't even attempt to type on this keyboard.

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I've never seen that equation. Shouldn't it be Z=R+jX?Just talking about circuit impedance complex numbers are usually used where Z= R +jZ , phasors can also be used.

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Maybe if she shaved.so would you still do her

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Yes, my bad. Fat finger error.Aussielec said:I've never seen that equation. Shouldn't it be Z=R+jX?

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Thanks

LC

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