Cable trays are available in many different forms and are used for many different purposes. As defined by the National Electrical Code (NEC), 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"
Ladder Tray <a href="http://www.guangjupaper.com/product/paper-cups/ripple-wall-paper-cups/">ripple wall paper cups</a> is a cable tray consisting of two longitudinal side members connected by individual transverse members, designed for use as power cable or control cable support.
Cable trays are made of either steel, aluminum or fiber reinforced plastic (FRP) and are available in many types, each with its own characteristics and intended applications.
Different types of Cable Trays:
Ladder Cable Tray:
Ladder Type Cable Trays are generally used in applications with intermediate to long support spans"12 to 30 feet.
Perforated Type Cable Tray:
The perforated type cable trays are made of HR sheets and also from pre galvanized sheets with various thickness and flange heights.
Solid Bottom Cable Tray:
Solid Bottom Cable Trays are generally used for minimal heat generating electrical or telecommunication applications with short to intermediate support spans"5 to 12 feet.
Channel Cable Tray:
Channel Cable Trays are generally 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.
Single Rail Cable Tray:
Single Rail Cable Trays are generally used for low voltage and power cable installations where maximum cable freedom, side fill and speed to install are factors.
Trough Cable Tray:
Trough Cable Trays are generally used for moderate heat generating applications with short to intermediate support spans�"5 to 12 feet.
Wire Mesh Cable Tray:
Wire Mesh Cable Trays are generally used for telecommunication and fiber optic applications, installed on short support spans.
Here are some the major characteristics that you must check before ordering Ladder Type Cable Trays:
Width: From 100 mm to 1500 mm
Height: From 50 mm from 200 mm
Length: Standard length of tray is 2500/3000mm
Galvanizing: As per IS: 2629 / 4759 / 2633
Thickness: 1.2mm, 1.5mm, 2mm, 2.5mm, 3mm
Bending: From 10 mm to 25 mm
Material: Mild Steel / Pre Galvanized: As per IS: 1079 Grade O / 513
Stainless Steel: SS 304 / 316 / 316L
Aluminum: Aluminum Alloy
M.S. goods Finish by: Red Oxide/ Enamel Painted/ Epoxy Paint powder coating/ Hot Dip Galvanized or as per customer specification.
Aluminum goods Finish by: Anodized
ELECTRAY FLANGE OUT:
Best constructed tray available for multiple large cables. Typically used by paper mills, power plants and industrial construction requiring strength and reliability.
Exclusive Thru-Weld completely welds rungs to the outside of the rails for optimum structural integrity and reduced side rail rotation.
Rung Spacings: 9", 12" and 18"
Load Depths: 3" through 5"
Materials available: Aluminum, Steel, Steel HDGAF, Stainless Steel, PVC-coated Aluminum or Steel.
VENTRAY FLANGE IN:
Best for supporting various diameter instrumentation, control and power cables.
Typically used by power plants, pulp and paper mills, petrochemical plants and industrial construction requiring strength and reliability where space is limited.
Rung Spacing: 6", 9" and 12"; Load Depths: 3" through 5"
Materials available: Aluminum, Mill-galvanized Steel, Steel HDGAF, Fiberglass, Stainless Steel, PVC-coated Aluminum or Steel.
After all, these days selecting any type of cable tray takes a lot of studies and experience..