I need a calculation for what the voltage drop is on # 10 wire (Resolved)

sam_sam_sam

Hi Every One

On to something new

Let me·first·say Thanks to all that have help me in past on the forum

I starting a new project and·I need some input

This ··came from a kit project from many year a ago· for a
Five Amp·Electronic Fuse

and their project they had four·resistors in·parallel and a transformer on the

AC side of the board then that input when to LM339 if i remember right

One·

·I know that AC voltage can KILL YOU if you are not care full·


·I WILL BE VERY·CARE FULL



I want to do this the·POOR MAN·way I want to use what I have on hand




This calculation may be off but i looking at some thing like this



I am going to use a transformer that is 12 volt to 110 volt amplifies the
· 500 mil to 5·volt so·I can use ADC chip


I want to get about·2.5 mil volts per amp of current off of the transformer
when done


What·I need to know what is the voltage drop on # 10··solid wire·per foot


How many·feet do you need to get·a·500 mi volt drop @·20 amps



And like I said earlier I will be safe about what I am doing

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··Thanks for any··that you may have and all of your time finding them

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Sam

Post Edited (sam_sam_sam) : 7/25/2008 8:13:31 PM GMT

Mike Green

Do a web search on "wire size resistance". The first "hit" was www.epanorama.net/documents/wiring/wire_resistance.html.

PJAllen

wire resistance, ohms per foot

http://www.cirris.com/testing/resistance/wire.html

sam_sam_sam

Mike

Thanks for the web Link

I used the AC voltage drop calculator at there web page and it was a lot of help



PJ

Thanks for the web link

·I also used their calculator as well This also was a lot of··help



Now I have the tool to get this project off the ground

·The ·calculator said

For # 12 wire would be·6.5 feet

This would give a voltage drop of······520 mil volts @ 20amps good enough






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··Thanks for any··that you may have and all of your time finding them

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Sam

Post Edited (sam_sam_sam) : 7/25/2008 8:20:29 PM GMT

Bean

sam_sam_sam said...

I am going to use a transformer that is 12 volt to 110 volt amplifies the·50 mil to 5·volt so·I can use ADC chip

Sam,
· A 12V to 110V transformer will only raise 50mVac to 500mVac or 0.5Vac not 5.0Vac.

Bean.


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"It is our choices, Harry, that show what we truly are, far more than our abilities."·Dumbledore from Harry Potter

www.iElectronicDesigns.com

·

sam_sam_sam

Bean



A 12 V to 110 V transformer will only raise 50 mil V ac to 500 mil V ac or 0.5 V ac not 5.0 V ac.

I move the decimal point to many places thanks for catching this mistake

Thanks for the info


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··Thanks for any··that you may have and all of your time finding them

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Sam

Post Edited (sam_sam_sam) : 7/25/2008 8:19:32 PM GMT