Cable Tray Selection
Per the National Electrical Code, a cable tray system is “a unit or assembly of units or sections and associated fittings forming a rigid structural system used to securely fasten or support cables and raceways.”
- Cable trays support cable the way that roadway bridges support traffic.
- A bridge is a structure that provides safe passage for traffic across open spans.
- Cable tray is the bridge that allows for safe transport of wires across open spans.
- Therefore, think of cable tray as the structural component of a building’s electrical system.
Types of Cable Tray are available :
- Ladder
- Solid Bottom
- Perforated
- Raceway
Perforated Cable Tray provides:
- Moderate ventilation with added cable support frequency and with the bottom configuration providing cable support every 4 inches. Available in metal and nonmetallic materials.
- standard widths of 50mm – 600mm
- standard thickness of 1mm – 3mm
- standard height of 25mm – 150mm
- standard lengths of 2500mm
Applications :
Perforated cable tray is generally used for moderate heat generating applications with short to intermediate support spans of 1.5mtr – 2.00mtr .
Ladder Cable Tray provides:
- Solid side rail protection and system strength with smooth radius fittings and a wide selection of materials and finishes.
- maximum strength for long span applications
- standard widths of 100mm – 2000mm
- standard thickness of 1mm – 3mm
- standard height of 40mm – 200mm
- standard lengths of 2500mm
Applications :
Ladder cable tray is generally used in applications with intermediate to long support spans, 2.50mtr – 3.00mtr
Solid Bottom Cable Tray provides:
- Non ventilated continuous support for delicate cables with added cable protection available in metallic and fiberglass.
- Solid bottom metallic with solid metal covers for nonplenum rated cable in environmental air areas.
- standard widths of 50mm – 600mm
- standard thickness of 1mm – 3mm
- standard lengths of 2500mm
Applications :
Solid Bottom cable tray is generally used for minimal heat generating electrical or telecommunication applications with short to intermediate support spans of 1.50mtr – 2.00mtr .
Raceway Cable Tray provides:
- An economical support for cable drops and branch cable runs from the backbone cable tray system.
- standard widths of 50mm – 1000mm
- standard thickness of 1mm – 3mm
- standard height of 25mm – 100mm
- standard length of 40mm – 200mm
Applications :
Channel cable tray is used for installations with limited numbers of tray cable when conduit is undesirable. Support frequency with short to medium support spans of 2.50mtr – 3.00mtr .