| Table 4.7 - Current ratings and volt drops for sheathed multi-core p.v.c.-insulated cables | ||||||||
|
Cross sectional area
|
In conduit in thermal insulation
|
In conduit in thermal insulation
|
In conduit on wall
|
In conduit on wall
|
Clipped direct
|
Clipped direct
|
Volt drop
|
Volt drop
|
|
(mm²)
|
(A)
|
(A)
|
(A)
|
(A)
|
(A)
|
(A)
|
(mV/A/m)
|
(mV/A/m)
|
|
-
|
2 core
|
3 or 4 core
|
2 core
|
3 or 4 core
|
2 core
|
3 or 4 core
|
2 core
|
3 or 4 core
|
|
1.0
|
11.0
|
10.0
|
13.0
|
11.5
|
15.0
|
13.5
|
44.0
|
38.0
|
|
1.5
|
14.0
|
13.0
|
16.5
|
15.0
|
19.5
|
17.5
|
29.0
|
25.0
|
|
2.5
|
18.5
|
17.5
|
23.0
|
20.0
|
27.0
|
24.0
|
18.0
|
15.0
|
|
4.0
|
25.0
|
23.0
|
30.0
|
27.0
|
36.0
|
32.0
|
11.0
|
9.5
|
|
6.0
|
32.0
|
29.0
|
38.0
|
34.0
|
46.0
|
41.0
|
7.3
|
6.4
|
|
10.0
|
43.0
|
39.0
|
52.0
|
46.0
|
63.0
|
57.0
|
4.4
|
3.8
|
|
16.0
|
57.0
|
52.0
|
69.0
|
62.0
|
85.0
|
76.0
|
2.8
|
2.4
|
Extracted from The Electricians Guide Fifth Edition
by John Whitfield
Published by EPA Press Click Here to order your Copy.