Feeder Copper
Feeder - Live @ Warwick SU

Electrical - First year engineering?

1. A resistance of 2.2 ohms is made ​​of nichrome wire. If the cable is available in 1 / 32 inch diameter, how much wire is needed? ** The answer is 3.58ft, I just need the operation ** 2. The resistance of copper wire is 0.92 ohms at 4 ° C. What temperature is 1.6 ohms? ** The answer is 40.3 ° C, operating only ** 3. A 600-volt generator is located at 1,500 feet away from your cargo. The load consists of two heaters of 10 kilometers, three other 4-hundred horsepower and 100 watts of light. If the drop voltage feeders copper did not exceed 5%, calculate the minimum size required. ** The answer is # 0, the operation need **

1. Resistivity, p, Nichrome Resistance is 150E-8, R = pL / A Area A * pi = (D ^ 2) / 4 = pi * (1 / 32) ^ 2 / 4 = 7.67E-4 Therefore, length, L = AR / p = 2.2x7.67E-4/150E-8 = 1.125 inches Unless the resistivity of nichrome is different from what I used in the calculation, the answer is above. 2. For the second part, The formula is complex to be in this place. Check out the link below for the calculation, using copper as the coefficient of 3.9E-3

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