Braided wire of length L is used to transmit a maximum DC power P from a solar p

Question

Braided wire of length L is used to transmit a maximum DC power P from a solar panel array to an inverter and battery bank. Each braid within the wire has diameter d. The solar array produces a maximum voltage V.

Building code requires that a large enough wire be used such that less than 2% of the power generated by the solar array durring peak operation is lost as heat generated within the wire.

Part A - How many braids are required to meet building code for the solar array?

The resistivity of the wire material is .

  N=(/0.08)(V^2d^2/PL)     N=(0.04/)(PL/V^2d^2)     N=(0.02/)(PL/V^2d^2)     N=(0.08/)(PL/V^2d^2)     N=(/0.04)(V^2d^2/PL)     N=(/0.02)(V^2d^2/PL)  

Explanation / Answer

N=(0.08/)(PL/V^2d^2)

as P*2/100 = N * (V^2 ) /R

R = * L / A

A = pi * d^2 /4

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