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Cooper B-Line, Inc Cable Tray Manual
Appendix Sheet 6
Example - NEC
®
Section 392.9(B)
Cable Tray containing Type ITC or Type PLTC Cables
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.
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.
6" Usable Cable Tray Width
4" Usable
Cable Tray
Depth
Cross Section Of The Cables And The Cable Tray
= 300 cables can be installed in this cable tray.
12 sq. in.
0.04 sq. in./cable
= 11.54 rows can be installed in this cable tray.
300 cables
26 cables/rows