- Reaction score
- 29
Allright ppl,
I've bought this book and have stumbled working on exercise 2 p174 (if anyone has the book). In particular the completion of the test results for the given circuit, which is a 63m ground floor socket circuit consisting of 8 socklet outlets wired in 2.5/1.5 pvc twin and earth. 2.5 resistance is 7.41m and 1.5 resistance is 12.10m, giving total resistance of 19.51 per metre.
So
r1 = 63 * 7.41 / 1000 = 0.46
r2 = 63 * 12.10 /1000 = 0.76
rn = 63 * 7.41 / 1000 = 0.46
So I calculate R1 + R2 = 0.46 + 0.76 / 4 = 0.31
But the book says its 0.08?
I've bought this book and have stumbled working on exercise 2 p174 (if anyone has the book). In particular the completion of the test results for the given circuit, which is a 63m ground floor socket circuit consisting of 8 socklet outlets wired in 2.5/1.5 pvc twin and earth. 2.5 resistance is 7.41m and 1.5 resistance is 12.10m, giving total resistance of 19.51 per metre.
So
r1 = 63 * 7.41 / 1000 = 0.46
r2 = 63 * 12.10 /1000 = 0.76
rn = 63 * 7.41 / 1000 = 0.46
So I calculate R1 + R2 = 0.46 + 0.76 / 4 = 0.31
But the book says its 0.08?