Table 4.14 - Cable factors (terms) for conduit and trunking
Type of conductor Conductor c.s.a. (mm˛) Factor for conduit Factor for trunking pvc insulation Factor for trunking thermosetting insulation
Solid
1.0
16
3.6
3.8
Solid

1.5

22
8.0
8.6
Stranded
1.5
22
8.6
9.1
Solid
2.5
30
11.9
11.9
Stranded
2.5
30
12.6
13.9
Stranded
4.0
43
16.6
18.1
Stranded
6.0
58
21.2
22.9
Stranded
10.0
105
35.3
36.3
Stranded
16.0
145
47.8
50.3
Stranded
25.0
217
73.9
75.4

Extracted from The Electricians Guide Fifth Edition
by John Whitfield

Published by EPA Press
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