Table 4.17 - Trunking factors (terms)
Dimensions of trunking (mm x mm)
Factor
37.5 x 50
767
50 x 50
1037
25 x 75
738
37.5 x 75
1146
50 x 75
1555
75 x 75
2371
25 x 100
993
37.5 x 100
1542
50 x 100
2091
75 x 100
3189
100 x 100
4252

Extracted from The Electricians Guide Fifth Edition
by John Whitfield

Published by EPA Press
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Click here for list of abbreviations