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786
Joined: 11 Aug 2008
Posts: 8
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 28 Aug 2008 12:37 Voltage drop |
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| Why do voltage drop happen when length of connecting wire is more e.g. if i have 12Vdc output and i want to connect to some device at a distance voltage gets drop, i know this happens but why?/ and what is solution to drive 12Vdc upto a certain distance??? please help
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laktronics
Joined: 06 Jan 2007
Posts: 896
Helped: 152
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| 28 Aug 2008 14:45 Re: Voltage drop |
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Hi,
It is due to IR drop in the resistance of the wire. You have to use thicker guage wires to reduce the drop in voltage, or distribute higher volatge and use local 12V regulators.
Regards,
Laktronics
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hagarbloke
Joined: 27 Jun 2008
Posts: 1
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| 08 Sep 2008 20:16 Voltage drop |
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| It mostly depends on the current you are trying to draw from the long connecting wires. The lower the current, the less effect the resistance of the conductors will have on the voltage. As load increases, the wires need to be proportionately lower in resistance (or greater in cross sectional area) to maintain a constant voltage. Google "Ohms Law".
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lsimeon
Joined: 01 Aug 2008
Posts: 43
Helped: 2
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| 02 Oct 2008 13:33 Voltage drop |
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| lakronics is right... the voltage drop is due to the resistance of the wire, of course the longer the wire the higher the resistance and will cause a higher voltage drop(from ohm's law w/c is V=IR) for you to have a lower resistance with a fix long wire you should use a solid wire with larger cross-sectional area(Resistance = resistivityxlength/area)...
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