64 WIRE LENGTH
When long wires are used, resistance in each wire increases while voltage drop occurs. Consequently, the input voltage to an electric appliance declines, often damaging the appliance. The table below shows that the voltage decreases in 100 m wire with different cross sectional areas and varied resistances.
Cross |
| Alloweble | j | No. of | 1 |
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araa |
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mm2 | j | A | j | No./mm |
| a/lOOm | 1 1A |
| 3A |
| 5A |
| 8A | ! | 10A | i | 12A | 1 | 15A |
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0.75 | I | 7 | : | 3010.18 | ’ | 2.477 | 2.5V |
| 8V |
| 12.5V |
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1.25 | I | 12 | : | 5010.18 | ! | 1.466 | 1.w | ! | 5v | i | 7.5V |
| 12v |
| 15v |
| 18V |
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2.0 | i | 17 |
| 37/0.26 |
| 0.952 | 1v | ,3v | I | 5V | ! | 8V |
| 1ov |
| 12v |
| 15v | d | |
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3.5 |
| 23 |
| 4510.32 | 0.517 | - | 1.5V |
| 2.5V | 1 | 4V | ’ | 5V |
| 6% |
| 7.5v | 5 | ||
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5.5 |
| 35 |
| 7010.32 |
| 0.332 | - |
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| 3.5v |
| 4v |
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