(3) Trough Cable Tray

It is used for moderate heat generating applications with short to intermediate support spans 5 to 12 feet

Characteristics:

• Moderate ventilation with added cable support frequency—with the bottom configuration providing cable support every four inches.
• Available in metal and nonmetallic materials
• Standard widths of 6, 12, 18, 24, 30 & 36 inches
• Standard depths of 3, 4, 5 & 6 inches
• Standard lengths of 10, 12, 20 & 24 feet
• Fixed rung spacing of 4 inches on center.

(4) Channel Cable Tray

• Used for installations with limited numbers of tray cable when conduit is undesirable. Support frequency with short to medium support spans 5 to 10 feet.

Characteristics:

• Economical support for cable drops and branch cable runs from the backbone cable tray system
• Standard widths of 3, 4, & 6 inches in metal systems and up to 8 inches in nonmetallic systems
• Standard depths of 1 1/4 to 1 3/4 inches in metal systems and 1, 1 1/8, 1 5/8 in nonmetallic systems
• Standard length of 10, 12, 20 & 24 feet.