| Table 5.5 - Resistance
per metre of copper conductors at 20°C for ---------------- calculation of R1 + R2 |
|
|
Conductor cross-sectional area
(mm²) |
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 Click Here to order your Copy.