Table 5.5 - Resistance per metre of copper conductors at 20C for
---------------- calculation of R1 + R2
Conductor cross-sectional area
(mm)
Resistance per metre run
(m ohms / m)
1.0
18.1
1.5
12.10
2.5
7.41
4.0
4.61
6.0
3.08
10.0
1.83
16.0
1.15
25.0
0.727
Note that to allow for the increase in resistance with increased temperature under fault conditions the values of {Table 5.5} must be multiplied by 1.2 for p.v.c. insulated cables (see {Table 8.7})

Extracted from The Electricians Guide Fifth Edition
by John Whitfield

Published by EPA Press
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