Hi there, has anyone worked out the question 1 of paper 2 November 2009?
The figure is as follows:
(db-220V DC) ----10mCable----(C1-50A)----9mCable----(C2-40A)----8mCable----(C3-30A)----7mCable----(C4-20A)
If this is not understood i can draw and post also.
The questions are:
1. use the figure and calculate the minimum cable size
2. calculate the voltage drops between the distribution board and the circuits c1 to c3 in each case
3. prove that the same copper cable was used.
Tables available: E.1 and 6.4(b)
I was using the VD = 2 x I x (resistivity x L)/A equation
Let me know your thoughts, Thanks!
The figure is as follows:
(db-220V DC) ----10mCable----(C1-50A)----9mCable----(C2-40A)----8mCable----(C3-30A)----7mCable----(C4-20A)
If this is not understood i can draw and post also.
The questions are:
1. use the figure and calculate the minimum cable size
2. calculate the voltage drops between the distribution board and the circuits c1 to c3 in each case
3. prove that the same copper cable was used.
Tables available: E.1 and 6.4(b)
I was using the VD = 2 x I x (resistivity x L)/A equation
Let me know your thoughts, Thanks!
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