Cable Tray Installations-Cable Tray-Cabletray-Cable Trays- Cable Tray Systems- Raceway Systems

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ATS carries raceway systems and Cable Tray from Cable Manger due to Cable-Mgr.'s innovative cable tray, and extensive cable tray systems design which are based on pre-fabricated junctions/intersections and the ability to provide powder coated finishes while maintaining grounding. The design eliminates the need to cut or bend sections or install a separate ground wire. Cable-Mgr. is U.L. classified as to its suitability as an equipment grounding conductor only.No connecting hardware required. All support hardware available. Powder coating is standard finish.Custom sizes available. Furthermore, Cable-Mgr.'s wire grid cable tray systems require only one tool and very few accessory items for installation. Pre-fabricated junctions/intersections reduce man-hours by eliminating cutting and fabrication in the field. With center hung trapeze, wall or floor mount accessories, Cable-Mgr. is prepared to handle the toughest installations

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Cable Tray Installations

Cable tray Installations-Cable-Mgr. should be installed from the originating head-end i.e., the electrical or telecommunications closet. Once the pathway has been established, it is important the layout of the pre-fabricated junctions be installed first. Junctions/intersections lengths are standard: 12 inches wide or less come 2 feet in length and junctions/intersections more than 12 inches wide come 3 feet in length. This allows for field measurements to be taken before installing the cable tray. If the straight sections are installed first, it will cause unnecessary field adjustments. Each section has loops at each end. When the sections are connected, the loop on the bottom aligns under the galvanized masked area of the adjoining section. The loop on the side slides into the outside loop guide. Once the trays are aligned, install the 5/16 inch carriage bolt (included) through the loops with the treaded end to the outside of the tray. Install and tighten the flanged nuts with a ½ inch socket. This reduces the chances of damage when pulling the cables. Elevation may be adjusted by using pre-fabricated drop with universal hooks (Fig. 1) or individual straight sections with universal hooks and extenders (Fig. 2). Adjust the length with the Cable-Mgr. cable tray extensions CM-58 (Fig. 3). The extensions fit into the side guides facilitating adjustment of the tray up to 6 inches on each end. It is not recommended that the cable tray be cut as it will interfere with the grounding characteristics and UL classification

Grounding Cable Tray

 

(1) Cable Tray Elevation Change CM15, CM25 and CM35 Drop

Cable Tray Elevation Change During some installations, it may be necessary to make an elevation change under or over an obstruction. This is accomplished by using a Drop. The Drop connects to a section with universal loops acting as a hinge. Set the desired angle, insert bolts, and tighten the hex flanged nuts. Powder-coating should be removed to ensure ground continuity.

 

(2) Cable Tray Elevation Change Using Straight Sections using Universal Loop (CM-70) and Universal Loop Off-Set (CM-71)

Cable Tray Elevation Change-Straight sections can be used to make elevation adjustments. The universal loop CM-70 is attached in the same way as a Drop. Scrape the powder-coated area where the loop attaches to ensure continuity in grounding. Bolt the universal off-set to the masked area on the side rail and to the loop attached to the next section. Place a 5/16 bolt through the loop to provide a pivot point. To set and lock the angle of elevation, use a 5/16 flanged nut.

 

(3) Cable Tray Extension using Offset Loop (CM-58)

Straight sections can be used to make elevation adjustments. The universal loop CM-70 is attached in the same way as a Drop. Scrape the powder-coated area where the loop attaches to ensure continuity in grounding. Bolt the universal off-set to the masked area on the side rail and to the loop attached to the next section. Place a 5/16 bolt through the loop to provide a pivot point. To set and lock the angle of elevation, use a 5/16 flanged nut.

 

Accessories

Center Support CM54xx Widths 02, 04, 06, 08, 12 inches

Trapeze Support CM55xx Widths 06, 08, 12, 18, 24 inches

Wall Mount* CM57xx Widths 02, 04, 06, 08, 12, 18, 24 inches*Anchor to floor or wall using 3/8 inch bolt & washer. Anchor hardware not included.

Tray Extension CM58xx

Waterfall CM5902 (4 inch width) 02 = Ø.187"

Universal Loop** CM70xx 02 = Ø.187" 03 = Ø.250" **Use 1 5/16 inch bolt on double loop end

What is Cable Tray?

1. What is a Cable Tray System?
2. What standards / guidelines are available for cable tray systems?
3. What types of Cable Tray are available?
4. How do I know what type of cable tray is right for my application?
5. What materials / finishes are available for the various cable tray systems?
6. Now that I know what types of cable trays are available, what configurations are available?
7. After selecting the type of cable tray and configuration required, what support methods are available?
8. Before selecting the type of cable tray, cable tray configuration(s), and support method desired, what additional information do I need to supply to the cable tray manufacturer for them to best understand and satisfy my needs?

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 standards / guidelines are available for cable tray systems?

1. The National Electrical Code publishes the standards for all types of electrical applications. Articles 318, 250, and 800 cover various aspects of cable tray systems.
2. NEMA, (National Electrical Manufacturers Association), is an association comprised of the major cable tray manufacturers in the industry. This committee has published three documents to date: NEMA VE1, FG1 and VE2.

NEMA VE1 covers general cable tray definitions, manufacturing standards, performance standards, test standards, and application information. Free download of this document is available on the NEMA website.

NEMA FG1 addresses the standards for fiberglass cable tray systems. Free download of this document is available on the NEMA website.

NEMA VE2 is a cable tray installation guideline which covers receiving and unloading material, storage of material, and general installation practices. Free download of this document is available on the NEMA website.
3. CTI, (Cable Tray Institute), is a trade association comprised of the major cable tray manufacturers in the industry and was formed to provide specifiers, designers, and installers information on the advantages of using cable tray systems over other types of products. (i.e. conduit, ladder rack, etc.)

What types of Cable Tray are available?

1. Ladder
2. Solid Bottom
3. Trough
4. Channel
5. Wire Mesh
6. Single Rail

How do I know what type of cable tray is right for my application?

1. Ladder Cable Tray provides:
1. Solid side rail protection and system strength with smooth radius fittings and a wide selection of materials and finishes.
2. maximum strength for long span applications
standard widths of 6,12,18, 24, 30, and 36 inches
3. standard depths of 3, 4, 5, and 6 inches
4. standard lengths of 10, 12, 20 and 24 feet
5. rung spacing of 6, 9, 12, and 18 inches
Ladder cable tray is generally used in applications with intermediate to long support spans, 12 feet to 30 feet.

2. Solid Bottom Cable Tray provides:
1. Nonventilated continuous support for delicate cables with added cable protection available in metallic and fiberglass.
2. Solid bottom metallic with solid metal covers for nonplenum rated cable in environmental air areas
3. standard widths of 6, 12, 18, 24, 30, and 36 inches
4. standard depths of 3, 4, 5, and 6 inches
5. standard lengths of 10, 12, 20 and 24 feet
Solid Bottom cable tray is generally used for minimal heat generating electrical or telecommunication applications with short to intermediate support spans of 5 feet to 12 feet.

3. Trough Cable Tray provides:
1. Moderate ventilation with added cable support frequency and with the bottom configuration providing cable support every 4 inches. Available in metal and nonmetallic materials.
2. standard widths of 6, 12, 18, 24, 30, 36 inches
3. standard depths of 3, 4, 5, and 6 inches
4. standard lengths of 10, 12, 20 and 24 feet
5. fixed rung spacing of 4 inch on center
Trough cable tray is generally used for moderate heat generating applications with short to intermediate support spans of 5 feet to 12 feet.

4. Channel Cable Tray provides:
1. an economical support for cable drops and branch cable runs from the backbone cable tray system.
2. standard widths of 3, 4, and 6 inches in metal systems and up to 8 inches in nonmetallic systems.
3. standard depths of 1¼-1¾ inches in metal systems and 1, 1 1/8, 1 5/" and 2 3/16 inches in nonmetallic systems
4. standard length of 10, 12, 20 and 24 feet
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 5 to 10 feet.

5. Wire Mesh Cable Tray provides:
1. A job site, field adaptable support system primarily for low voltage, telecommunication and fiber optic cables. These systems are typically steel wire mesh, zinc plated.
2. standard widths of 2, 4, 6, 8, 12, 16, 18, 20, and 24 inches
3. standard depths of 1, 2, and 4 inches
4. standard length of about 10 feet (118")
Wire Mesh tray is generally used for telecommunication and fiber optic applications and are installed on short support spans, 4 to 8 feet.

6. Single Rail Cable Tray provides:
1. These aluminum systems are the fastest systems to install and provide the maximum freedom fort cable to enter and exit the system.
2. Single hung or wall mounted systems in single or multiple tiers.
3. Standard widths are 6, 9, 12, 18, and 24 inches.
4. Standard depths are 3, 4, and 6 inches.
5. Standard lengths are 10 and 12 feet.
Single Rail Cable Tray is generally used for low voltage and power cables installations where maximum cable freedom, side fill, and speed to install are factors.

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

1. Steel (Min. Yield = 33KSI) (35 KSI for Stainless)
1. Plain: hot rolled pickled and oiled steel per ASTM A569 (Commercial Quality) or A570 (Structural Quality)
2. Pre-Galvanized: mill galvanized steel per ASTM A653 CS (Commercial) or SS (Structural) G90
3. Hot Dip Galvanized After Fabrication: plain steel which is hot dipped after fabrication per ASTM A123.
4. Stainless Steel: type 304 or 316L fully annealed stainless steel

2. Aluminum (Min.Yield = 23 KSI)
1. 6063-T6 or 5052-H32 alloy per ASTM B209

3. Fiber Reinforced Plastic (FRP)
1. Polyester and Vinyl Ester resin systems available
2. meet ASTM E-84 smoke density rating; Polyester 680, Vinyl Ester 1025
3. Class 1 Flame Rating and self-extinguishing requirements of ASTM D-635.

Now that I know 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. Underfloor Support
6. Pipe stanchions or other structures

Each of these support methods are preferable in different applications. For instance, trapeze supports may 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 underfloor supports are useful when ceiling structure is not available or undesired. Outdoor installations are controlled by the structures available to support the cable tray.
Before selecting the type of cable tray, cable tray configuration(s), and support method desired, what additional information do I need to supply to the cable tray manufacturer for them to best understand and satisfy my needs?

1. Where? Job site and installation considerations
1. Outdoor
1. supports available affect the length and strength requirements
2. environmental loads, ice, wind, snow, and possibly seismic
3. corrosion requirements affect the materials and finishes
4. classified hazardous locations affect the cable types acceptable
2. Indoor
1. support locations available affect the length and strength of the system
2. industrial installation may require a 200 lb. Concentrated Load
3. commercial or institutional installation may make system appearance, system weight, and space available important factors
4. environmental air handling area may affect cable types, cable tray material, or cable tray type and need for covers
5. classified hazardous locations affect the cable types acceptable

2. What?
1. Type and number of cables to support
1. NEC cable fill requirements dictate size, width and depth, of system
2. cable support requirement may control bottom type
3. largest bending radius of cable controls fitting radius
4. total of cable weight determines load to support
2. Future requirements
1. cable entry / exit freedom
2. design partially full or an expandable system
3. support type to allow for needs

Features and Benefits

Key Features- Applications

• Requires NO bending or cutting; ready–made 4-way, “T” and “L” shaped junctions
• Conforms to the National Electric Code, UL Classified
• Acts as a continuous ground conductor; no grounding splices
• Adapts to difficult architectural designs to accommodate changes in direction and elevation of cable runs
• Cuts installation time up to 50 percent
• Provides strength, rigidity without additional hardware; has smooth edges
• Manufactured in an array of protective, powder-coated, colored finishes to minimize corrosion
• Featured in light or heavy duty product styles
• All support hardware available
• Powder coating is standard finish
• Custom sizes available

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