Example - NEC® Section 392.9(B)
Cable Tray containing Type ITC or Type PLTC Cables
6" Usable Cable Tray Width
4" Usable
Cable Tray
Depth
Cross Section Of The Cables And The Cable Tray
50% of the cable tray useable cross sectional area can contain type PLTC cables
4 inches x 6 inches x .050 = 12 square inches allowable fill area.
2/C - #16 AWG 300 volt shielded instrumentation cable O.D. = 0.224 inches.
Cross Sectional Area = 0.04 square inches.
| 12 sq. in. |
| = 300 cables can be installed in this cable tray. | |
0.04 sq. in./cable |
| |||
| 300 cables | = 11.54 rows can be installed in this cable tray. | ||
|
|
| ||
| 26 cables/rows | |||
Notes:
1.The cable sizes used in this example are a random selection.
2.Cables - copper conductors with PVC insulation, aluminum/mylar shielding, and PVC jacket.
| Appendix Sheet 6 |
Cooper | Cable Tray Manual |
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