Table 4.16 - Conduit factors (terms)
Length of run between boxes (m)
 
1
2
3
4
5
6
8
10
Conduit, straight
-
16mm
290
290
290
171
171
167
158
150
20mm
460
460
460
286
278
270
256
244
25mm
800
800
800
514
500
487
463
442
32mm
1400
1400
1400
900
878
857
818
783
Conduit, one bend
-
16mm
188
177
167
158
150
143
130
120
20mm
303
286
270
256
244
233
213
196
25mm
543
514
487
463
442
422
388
258
32mm
947
900
857
818
783
750
692
643
Conduit, two bends
-
16mm
177
158
143
130
120
111
97
86
20mm
286
256
233
213
196
182
159
141
25mm
514
463
422
388
358
333
292
260
32mm
900
818
750
692
643
600
529
474
For 38mm conduit use the 32mm factor x 1.4.
For 50mm conduit use the 32mm factor x 2.6.
For 63mm conduit use the 32mm factor x 4.2.

Extracted from The Electricians Guide Fifth Edition
by John Whitfield

Published by EPA Press
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Click here for list of abbreviations