TRUNKING SIZING
| To determine the size of trunking for an installation, all the contractor needs to complete is the number of cables column - the calculator will then give the total factor value. The size of trunking can then be looked up from the information below. Three calculator sheets are provided for:
The page below shows a worked example for metal trunking. |
Metal Trunking Sizing Calculator | ||||
for PVC cables (BS 6004) | ||||
Single core- PVC | Conductor C.S.A | Terms per cable | No of cables | Total terms |
SOLID | 1.50 | 8.00 | ||
SOLID | 2.50 | 11.90 | ||
STRANDED | 1.50 | 8.60 | 20 | 172 |
STRANDED | 2.50 | 12.60 | 45 | 567 |
STRANDED | 4.00 | 16.60 | 70 | 1162 |
STRANDED | 6.00 | 21.20 | 50 | 1060 |
STRANDED | 10.00 | 35.30 | 20 | 706 |
STRANDED | 16.00 | 47.8 | 6 | 287 |
STRANDED | 25.00 | 73.9 | ||
Sum of terms | 3954 | |||
The trunking sizes shaded grey | ||||
Dimensions of trunking mm x mm | Sizing factor | Dimensions of trunking mm x mm | Sizing factor |
|
50x38 | 767 | 200x100 | 8572 | |
50x50 | 1037 | 200x150 | 13001 | |
75x25 | 738 | 200x200 | 17429 | |
75x38 | 1146 | 225x38 | 3474 | |
75x50 | 1555 | 225x50 | 4671 | |
75x75 | 2371 | 225x75 | 7167 | |
100x25 | 993 | 225x100 | 9662 | |
100x38 | 1542 | 225x150 | 14652 | |
100x50 | 2091 | 225x200 | 19643 | |
100x75 | 3189 | 225x225 | 22138 |
|
100x100 | 4252 | 300x38 | 4648 | |
150x38 | 2999 | 300x50 | 6251 | |
150x50 | 3091 | 300x75 | 9590 | |
150x75 | 4743 | 300x100 | 12929 | |
100x100 | 6394 | 300x150 | 19607 | |
150x150 | 9697 | 300x200 | 26285 | |
200x38 | 3082 | 300x225 | 29624 | |
200x50 | 4145 | 300x300 | 39428 | |
200x75 | 6359 | |||