8/7/2019 CABLE TRAY CHOICE

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If you are looking for or if you are in process of installing cable tray wiring system, better you read this

article to know almost everything about cable tray wiring system.

What is a Cable Tray System?

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."

What does this mean?

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.

What types of Cable Tray are available?

1.Ladder

2.Solid Bottom

3.Trough

4.Channel

5.Wire Mesh

6.Single Rail

What materials / finishes are available for the various cable tray systems?

1.Steel

2.Aluminum

3.Fiber Reinforced Plastic

What types of cable trays are available, what configurations are available?

1.Straight sections are available to route cables in a horizontal or vertical plane.

2.Fittings are available to route cables in various directions in either the horizontal or vertical planes.

Typical examples of fittings include elbows, tees, crosses, and risers. Each of these fittings are available

in various radii and bend angles.

3.Covers are accessories and shouldn't be in here unless splices etc. are included.

After selecting the type of cable tray and configuration required, what support methods are available?

1.Trapeze Support (Single or Multi-tier)

2.Hanger rod clamps, "J" hangers

3.Center Hung Support

4.Wall Support

5.Under floor Support

6.Pipe stanchions or other structures

Each of these support methods are preferable in different applications. For instance, trapeze supportsmay be desired in an application where cables will be pulled through the cable tray. Center hung

supports, on the other hand, are generally used when cables will be installed from the side of the cable

tray. Center hung supports are especially useful when future cable additions are desired. Wall supports

and under floor supports are useful when ceiling structure is not available or undesired. Outdoor

installations are controlled by the structures available to support the cable tray.

Here are some the major characteristics that you must check before ordering Ladder Type Cable

Trays:

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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 / 513Stainless 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

Different types of Cable Trays:

Ladder Cable Tray:

Perforated Type Cable Tray:

The perforated type cable trays are made of HR sheets and also from pre galvanized sheets withvarious thickness and flange heights.

Solid Bottom Cable Tray:

Solid Bottom Cable Trays are generally used for minimal heat generating electrical ortelecommunication applications with short to intermediate support spans5 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 spans5 to 10 feet.

Single Rail Cable Tray:

Single Rail Cable Trays are generally used for low voltage and power cable installations wheremaximum 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 tointermediate support spans5 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.Read more at http://www.articlealley.com/article_1671860_45.html?ktrack=kcplink