Per the National Electrical Code Article NEMA 392-9(b) cable tray fill calculations and cable tray sizing calculations will be computed as follows. Cable Trays may be filled 50% when using control or signal wiring. The sum of the cross sectional areas of all cables cannot exceed 50% of the trays fill area. The cable tray sizing equals the width times the loading depth. Generally, cable tray sizing is correct when it appears 50% full of cable or wire , or when it contains a 50% fill of cables or wire.
Wire Basket Cable Tray Fill Calculator - Cable Tray Sizing Calculator
| Catalog Number | Tray Width (inches) | Tray Depth (inches) | Quantity of Cables by Cable Diameter | ||||
| 0.210" | 0.250" | 0.265" | 0.300" | 0/354" | |||
| WBS22-2-3M-EZ | 2 | 2 | 55 | 39 | 35 | 27 | 5 |
| WBS22-4-3M-EZ | 4 | 2 | 111 | 78 | 70 | 54 | 10 |
| WBS22-6-3M-EZ | 6 | 2 | 167 | 118 | 105 | 82 | 16 |
| WBS22-8-3M-EZ | 8 | 2 | 223 | 157 | 140 | 109 | 21 |
| WBS22-12-3M-EZ | 12 | 2 | 355 | 236 | 210 | 164 | 32 |
| WBS22-24-3M-EZ | 24 | 2 | 671 | 437 | 421 | 327 | 65 |
| WBS24-4-3M-EZ | 4 | 4 | 223 | 157 | 140 | 109 | 21 |
| WBS24-6-3M-EZ | 6 | 4 | 335 | 236 | 210 | 164 | 32 |
| WBS24-8-3M-EZ | 8 | 4 | 447 | 315 | 281 | 218 | 43 |
| WBS24-12-3M-EZ | 12 | 4 | 671 | 473 | 421 | 328 | 65 |
| WBS24-18-3M-EZ | 18 | 4 | 1006 | 710 | 632 | 493 | 98 |
| WBS24-24-3M-EZ | 24 | 4 | 1342 | 947 | 843 | 657 | 131 |
| WBS26-8-3M-EZ | 8 | 6 | 671 | 473 | 421 | 328 | 65 |
| WBS26-12-3M-EZ | 12 | 6 | 1006 | 710 | 632 | 493 | 98 |
| WBS26-18-3M-EZ | 18 | 6 | 1510 | 1065 | 948 | 740 | 147 |
| WBS26-24-3M-EZ | 24 | 6 | 2013 | 120 | 1264 | 968 | 197 |
| WBS26-30-3M-EZ | 30 | 6 | 2517 | 1771 | 1580 | 1233 | 245 |
| WBS26-36-3M-EZ | 36 | 6 | 3019 | 2130 | 1896 | 1479 | 295 |