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Participant

Join Date: Feb 2012
Posts: 2

Induction Distance for Voltage

02/22/2012 1:45 PM

A 500 kw power line giving off a magnetic field at ground level of 20 millivolts, what would the distant be to receive 220 volts by inductance into a 8 gauge cable? I have found that at 25 feet from the ground up there is 5 volts, the power line is 100 feet above ground.

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Join Date: Apr 2009
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#1

Re: Induction Distance for Voltage

02/22/2012 1:57 PM

Trying to grab some free electricity, huh?

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#2

Re: Induction Distance for Voltage

02/22/2012 2:32 PM

Well that's illegal, will cost you a lot in magnet wire and you'll have to be real close, it will be pretty visible, besides you don't know anyone here, so you won't get any cigarrettes when you're in jail.

Where are you from, pal ?

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#3

Re: Induction Distance for Voltage

02/22/2012 3:01 PM
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#4
In reply to #3

Re: Induction Distance for Voltage

02/22/2012 5:31 PM

Wow, where was that taken?

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#5
In reply to #4

Re: Induction Distance for Voltage

02/22/2012 6:03 PM

Somewhere in India.

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Anonymous Poster #1
#6

Re: Induction Distance for Voltage

02/22/2012 6:20 PM

To the group, Seems no one could answer my question. And for the record, no I do not want to steal any power from the power line. Just thinking how it could be done, its not very safe is it!!!!! HI HI

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#7
In reply to #6

Re: Induction Distance for Voltage

02/22/2012 10:59 PM

No one has been answering your question - because you do not know what you want and you are not asking the right questions.

To start with - there is no such thing as a 500kw line. One has to assume that yuou mean a 500kV line . . yes?

Next - you do not have any magnetic field due to the 500kV voltag - magnetic field is due to the current in the line - not the voltage.

Next - what you are measuring is electric field - not magnetic induction. The value you measure will depend on "how you measure it" . . and "what you measure it with". If you use a VERY HIGH IMPEDANCE voltmeter - you will measure a lot more than with an ordinary 10Mohm input device.

Yes, there are ways of harnessing the power from a HV line in this manner. One would need to string a lot of wire under the line . . .

Yes, it well may be dangerous, thus I would not recommend it to someone who does not know beans about electricity and electrical engineering.

O

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Active Contributor

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#8
In reply to #6

Re: Induction Distance for Voltage

02/23/2012 12:58 AM

Vincent dear........the point is not how it could be done............instead..........why do you want to do it...........if you tell us the real reason or the problem you are facing because of which you want to do illegeal and dnagerous things........may be we can help you with better alternatives which wont be either illegeal or dangerous.......still dear..........nothing personal....................but answering your question..........it is better to hook power directly

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#9
In reply to #6

Re: Induction Distance for Voltage

02/23/2012 3:20 AM

Well, if it isn't very safe, don't do it.

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#10

Re: Induction Distance for Voltage

02/23/2012 4:47 AM

On top of all previous answers, do not forget that electrical field repartition is extremely distorted by the medium, ie e air, or other materiel (see dielectric constant of materials http://en.wikipedia.org/wiki/Dielectric_constant) and its shape (see Benjamin Franklin discoveries ...).

So there is no straightforward answer to your question .

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#11

Re: Induction Distance for Voltage

02/23/2012 9:58 AM

If you want to nick power then just drive some nails into the public supply conductors and tap onto those.

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#16
In reply to #11

Re: Induction Distance for Voltage

02/24/2012 3:17 PM

This is all pretty funny! Hope no one trys to physically try and do this dangerous test. This was just a test, right?? I'm sure no person in there right mind will try and drive nails into a service cable for tapping some juice. After all, a tread mill with a small generator attached to it,and some iranian running on it would do the job.

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#17
In reply to #16

Re: Induction Distance for Voltage

02/24/2012 9:52 PM

It really does happen.

Do it yourself IDCs...

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Power-User

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#12

Re: Induction Distance for Voltage

02/23/2012 10:32 AM

Redneck Last words!

"Hey Ya'll Watch This!" or "Here Hold My Beer while I string this wire"

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Active Contributor

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#13

Re: Induction Distance for Voltage

02/23/2012 11:28 AM

?

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#14

Re: Induction Distance for Voltage

02/24/2012 5:56 AM

I would advise you to first find out the safe working distance for each rated voltage like 230,400,3300,6600,11000,33000,66000,132000,275000,400000 etc to avoid electrocution

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#15

Re: Induction Distance for Voltage

02/24/2012 6:37 AM

You will know when you get too close....

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