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Electrical Inspection & Testing Forum
Rfc Lenghth As Per Resistance Value
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<blockquote data-quote="Rutts35" data-source="post: 307439" data-attributes="member: 21256"><p>Errr....no. I agree with </p><p></p><p><span style="color: #ff0000"><em>Your total length of individual conductors are:-</em></span></p><p></p><p><span style="color: #ff0000"><em>r1 = 191.6m </em></span></p><p></p><p><span style="color: #ff0000"><em>r2 = 192.6m if @ 1.5mm</em></span></p><p></p><p><span style="color: #ff0000"><em>rn = 190.3m </em></span></p><p></p><p><span style="color: #ff0000"><em>average length 191.5m</em></span></p><p></p><p>but</p><p></p><p>19.51mΩ/m (0.01951Ω) is the R1+R2 value/metre for a length of T+E 2.5/1.5.</p><p></p><p>and</p><p></p><p>14.82mΩ/m (0.01482Ω) is the R1+R2 value/metre for a length of T+E 2.5/2.5.</p><p></p><p>So </p><p></p><p>0.98Ω/0.01951=50.23</p><p></p><p>So roughly</p><p></p><p>50.23X4=200.92</p><p></p><p>which is roughly in keeping with the values you worked out using the individual r1,r2 and rn</p><p></p><p>I'm not nit picking. Just that if someone who doesn't know reads this they may take those figures as read rather than check the correct table and come up with the wrong result. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Rutts35, post: 307439, member: 21256"] Errr....no. I agree with [COLOR=#ff0000][I]Your total length of individual conductors are:-[/I][/COLOR] [COLOR=#ff0000][I]r1 = 191.6m [/I][/COLOR] [COLOR=#ff0000][I]r2 = 192.6m if @ 1.5mm[/I][/COLOR] [COLOR=#ff0000][I]rn = 190.3m [/I][/COLOR] [COLOR=#ff0000][I]average length 191.5m[/I][/COLOR] but 19.51mΩ/m (0.01951Ω) is the R1+R2 value/metre for a length of T+E 2.5/1.5. and 14.82mΩ/m (0.01482Ω) is the R1+R2 value/metre for a length of T+E 2.5/2.5. So 0.98Ω/0.01951=50.23 So roughly 50.23X4=200.92 which is roughly in keeping with the values you worked out using the individual r1,r2 and rn I'm not nit picking. Just that if someone who doesn't know reads this they may take those figures as read rather than check the correct table and come up with the wrong result. :) [/QUOTE]
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Rfc Lenghth As Per Resistance Value
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