An aluminum wire 2250 feet long cannot have a resistance greater than 0.2 ohm. What is the minimum size wire (in circular mils) that may be used?
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To find the size of wire, use:cmil = K (ohms per.mil ft)*L (ft)/R(ohms)= 17*2250/0.2= 191,250Since the resistance cannot be greater than 0.2 ohm, the conductor cannot be smaller than 191,250 circular mils. The smallest acceptable standard conductor size is 4/0 AWG.
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