| Table 4.6 - Current ratings and volt drops for unsheathed single 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 cables
|
|
2 cables
|
|
2 cables
|
|
2 cables
|
3 or 4 cables
|
|
1.0
|
11.0
|
10.5
|
13.5
|
12.0
|
15.5
|
14.0
|
44.0
|
38.0
|
|
1.5
|
14.5
|
13.5
|
17.5
|
15.5
|
20.0
|
18.0
|
29.0
|
25.0
|
|
2.5
|
19.5
|
18.0
|
24.0
|
21.0
|
27.0
|
25.0
|
18..0
|
15.0
|
|
4.0
|
26.0
|
24.0
|
32.0
|
28.0
|
37.0
|
33.0
|
11.0
|
9.5
|
|
6.0
|
34.0
|
31.0
|
41.0
|
36.0
|
47.0
|
43.0
|
7.3
|
6.4
|
|
10.0
|
46.0
|
42.0
|
57.0
|
50.0
|
65.0
|
59.0
|
4.4
|
3.8
|
|
16.0
|
61.0
|
56.0
|
76.0
|
68.0
|
87.0
|
79.0
|
2.8
|
2.4
|
Extracted from The Electricians Guide Fifth Edition
by John Whitfield
Published by EPA Press Click Here to order your Copy.