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
|
Tray Size
|
# of 0.1852"
O.D. Cables |
# of 0.21"
O.D. Cables |
|
2" x 2"
|
74
|
57
|
|
2" x 4"
|
148
|
115
|
|
2" x 6"
|
222
|
173
|
|
2" x 6"
|
296
|
230
|
|
2" x 8"
|
296
|
230
|
|
2" x 12"
|
445
|
346
|
|
2" x 16"
|
593
|
461
|
|
2" x 18"
|
668
|
519
|
|
2" x 22"
|
816
|
635
|
|
2" x 24"
|
890
|
692
|
|
2" x 28"
|
1039
|
808
|
|
4" x 4"
|
296
|
230
|
|
4" x 8"
|
594
|
461
|
|
4" x 12"
|
890
|
692
|
|
4" x 14"
|
1039
|
808
|
|
4" x 16"
|
1187
|
923
|
|
4" x 18"
|
1336
|
1039
|
|
4" x 20"
|
1484
|
1154
|
|
4" x 24"
|
1781
|
1385
|
|
6" x 8"
|
890
|
692
|
|
6" x 16"
|
1781
|
1385
|
|
6" x 20
|
2227
|
1732
|