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Do-It-Yourself (DIY) Question & Answer Forum
Touch - Voltage.. (all who enter get some headache tablets from welshy first!)
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<blockquote data-quote="kme" data-source="post: 5005" data-attributes="member: 113"><p>Yeah steps; you NEED your beauty sleep.</p><p></p><p>SL - I`se here massa!</p><p></p><p>I would have to concur with your understanding of "touch voltage". That would also be my POV.</p><p></p><p>I apologise in advance - I`m not actually hi-jacking here; we`ve left the other one dead (I hope!)</p><p></p><p>But if I may digress a moment?</p><p></p><p>r.e. my comment about the 300KV grid supply.</p><p></p><p>Why is the national grid transporting electricity at such a voltage?</p><p></p><p>Because the conductors have a finite impedance. At, say 415V, with a presumed impedance of 0.1 ohm per kilometre, a massive amount of current would be generated within the cables; to be dissipated as heat.</p><p></p><p>As the impedance is a constant; the voltage is increased in order to lower the current; thereby minimising the losses in the supply cable.QED</p><p></p><p>Now, if we can return (sorry mr. Special) to "touch voltage".</p><p></p><p>p.s. Admin:</p><p></p><p>Don`t strain yourself - ask the missus for help with the longer words....... like "Peter" for instance. :^O </p><p></p><p>I would be interested in any other POV`s; on this matter; as I`m sure would we all.</p><p></p><p>KME</p></blockquote><p></p>
[QUOTE="kme, post: 5005, member: 113"] Yeah steps; you NEED your beauty sleep. SL - I`se here massa! I would have to concur with your understanding of "touch voltage". That would also be my POV. I apologise in advance - I`m not actually hi-jacking here; we`ve left the other one dead (I hope!) But if I may digress a moment? r.e. my comment about the 300KV grid supply. Why is the national grid transporting electricity at such a voltage? Because the conductors have a finite impedance. At, say 415V, with a presumed impedance of 0.1 ohm per kilometre, a massive amount of current would be generated within the cables; to be dissipated as heat. As the impedance is a constant; the voltage is increased in order to lower the current; thereby minimising the losses in the supply cable.QED Now, if we can return (sorry mr. Special) to "touch voltage". p.s. Admin: Don`t strain yourself - ask the missus for help with the longer words....... like "Peter" for instance. :^O I would be interested in any other POV`s; on this matter; as I`m sure would we all. KME [/QUOTE]
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Touch - Voltage.. (all who enter get some headache tablets from welshy first!)
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