National Data Supply offers raceway & raceway system solutions and Cabletraysystems from several manufacturer's including our new Snake Tray Cable Tray- Raceway raceway systems, plastic raceway systems and metal raceway system solutions, and cable trays featured above such as Cable Manager cable tray, and Cablofil raceway, Cabletrayand raceway systems, Hendry raceway , Newton, DEK raceways, ICC standard raceways, and ICC's custom Raceway System Solutions (RSS). Designed to make installation simple and easy, Cablofil wire Cabletrayis truly a revolutionary advancement in cable management. Per the National Electrical Code, a Cabletraysystem 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. National Data Supply offers raceway system solutions and Cabletraysystems from several manufacturer's including our new Snake Tray Cable Tray- Raceway raceway systems and cable trays featured above, Cable Manager cable tray, and Cablofil raceway, Cabletrayand raceway systems, Hendry raceway , Newton, DEK raceways, ICC standard raceways, and ICC's custom Raceway System Solutions ICC's raceway structured cabling solutions offer flexibility and ease of installation. Each component is skillfully engineered and crafted to provide a clean and secure system that fits virtually any open architectural environment. See all our raceway solutions below.
Cablofil Raceway- Cablofil Cabletray
Cablofil Now has Painted Cabletray and Raceway! Call Us Today At (866) 342-3721
We can ship most Cabletrayparts the same day!Snake Tray Cable Tray- Raceway® is pleased to announce the new larger size 18-inch wide and 4-inch deep Cabletraythat creates 72 square inches of cable path to hold over 1000 Cat5e (.21 OD) cables
$6.75 - $30.85
New!
Snake Hook!
New SnakeTube
Snake Tube Fire Resistant Duct! Up to 900 Degrees for 3 hours! As strong as steel yet as pliable as PVC, Snake Tube comes in 300 foot lengths for ultra-fire resistant environments. Specially designed for control cables, ships, communication-control situiations where if a fire breaks out- the cables inside will not melt and you will be able to get data through the firestorm and get people out safely and in time
Our best selling and most versatile labor saving raceway system and Cabletraycable management systems is the 201 Series Snake Tray Cable Tray- Raceway. It can be mounted below access floors, wall mounted, ceiling mounted or suspended from a threaded rod. The 201 Series Snake Tray Cable Tray- Raceway is available in six sizes and can hold up to 700 Category 5e Cables
CM-WBN-201
Snake Tray Cable Tray- Raceway 201 SERIES Wall Mount Bracket
$8.90
CM-WBN-201D
Snake Tray Cable Tray- Raceway 201 SERIES Wall Mount Bracket for DOUBLE SNAKE
$12.25
CM-RBN-201
Snake Tray Cable Tray- Raceway 201 SERIES RACK Mount Bracket
$30.85
CM-RBN-201D
Snake Tray Cable Tray- Raceway 201 SERIES RACK MOUNT FOR DOUBLE SNAKE
$30.85
CM-ST-201
Snake Tray Cable Tray- Raceway 201 SERIES PEDESTAL MOUNT BRACKET
$6.75
CM-ST-201D
Snake Tray Cable Tray- Raceway 201 SERIES PEDESTAL MOUNT BRACKET-DOUBLE SNAKE
$15.90
CM-CBN-201
Snake Tray Cable Tray- Raceway 201 SERIES CABINET MOUNT BRACKET
$30.85
CM-CBN-201D
Snake Tray Cable Tray- Raceway 201 SERIES CABINET MOUNT BRACKET-DOUBLE SNAKE
$30.85
CM-RBN-201D
Snake Tray Cable Tray- Raceway 201 SERIES RACK MOUNT FOR DOUBLE SNAKE
$30.85
CM-ST-201
Snake Tray Cable Tray- Raceway 201 SERIES PEDESTAL MOUNT BRACKET
$6.75
CM-ST-201D
Snake Tray Cable Tray- Raceway 201 SERIES PEDESTAL MOUNT BRACKET-DOUBLE SNAKE
$15.90
CM-CBN-201
Snake Tray Cable Tray- Raceway 201 SERIES CABINET MOUNT BRACKET
$30.85
CM-CBN-201D
Snake Tray Cable Tray- Raceway 201 SERIES CABINET MOUNT BRACKET-DOUBLE SNAKE
$30.85
CM-WBN-201
Snake Tray Cable Tray- Raceway 201 SERIES Wall Mount Bracket
$8.90
CM-WBN-201D
Snake Tray Cable Tray- Raceway 201 SERIES Wall Mount Bracket for DOUBLE SNAKE
$12.25
CM-RBN-201
Snake Tray Cable Tray- Raceway 201 SERIES RACK Mount Bracket
$30.85
CM-RBN-201D
Snake Tray Cable Tray- Raceway 201 SERIES RACK MOUNT FOR DOUBLE SNAKE
$30.85
CM-ST-201
Snake Tray Cable Tray- Raceway 201 SERIES PEDESTAL MOUNT BRACKET
$6.75
CM-ST-201D
Snake Tray Cable Tray- Raceway 201 SERIES PEDESTAL MOUNT BRACKET-DOUBLE SNAKE
$15.90
CM-CBN-201
Snake Tray Cable Tray- Raceway 201 SERIES CABINET MOUNT BRACKET
$30.85
CM-CBN-201D
Snake Tray Cable Tray- Raceway 201 SERIES CABINET MOUNT BRACKET-DOUBLE SNAKE
Call (866) 342-3721 for latest pricing or click on the chat button at the top of the page to talk to us
We now carry ADC Raceway-Click Here Now or Call (866)342-3721
Multilink Raceways
Dual Gang Surface Mount Box 3-1/4" x 5" x 2"
MJB-2-XX
Weight: 0.25 lbs
List Price: $5.19 Our Price:$3.63
Multilink Junction Box Single Gang - MJB-1-XX
MJB-1-XX
Weight: 3 lbs
List Price: $2.55 Our Price:$2.41
All Raceways and Raceway Fittings Come in Ivory- White and Office White
Plastic Raceway -Fiber-Optic and Category 6 - 1" Bend Radius Compliant
Multi-raceway holds cables to a one inch bend radius, thus maintaining end to end connectivity, even when filled to capacity or pulled through the raceway. The one piece design constructed of 94-o rigid vinyl, features a highly flexible hinge and self locking latch.
1-1/4" Multilink MultiRaceway - 6 Ft. Length
PRO-MRM12
72x1.25x.75$ 7.75 - 6 Foot Length
Fiber Optic Raceway -Fiber-Optic and Category 6 - 1" Bend Radius Compliant
Multiraceway holds cables to a one inch bend radius, thus maintaining end to end connectivity, even when filled to capacity or pulled through the raceway. The one piece design constructed of 94-o rigid vinyl, features a highly flexible hinge and self locking latch.
1-3/4" Multilink MultiRaceway - 6 Ft. Length
PRO-MRM17
72x1.75x1
$ 11.80 - 6 Feet
Fiber Optic Raceway-Fiber-Optic and Category 6 - 1" Bend Radius Compliant
Multiraceway holds cables to a one inch bend radius, thus maintaining end to end connectivity, even when filled to capacity or pulled through the raceway. The one piece design constructed of 94-o rigid vinyl, features a highly flexible hinge and self locking latch.
ICC Raceway System Cutting Tool-Part# ICACSTPE60 ICC's new raceway cutting tool is intended for making raceway installations faster and easier. This new tool cuts and trims with much less effort and provides a clean smooth finish. Its clean cutting capability eliminates rough edges and allows the connectors and track sections to fit together better, creating a much cleaner overall installation. The tool incorporates a ratcheting design and an ergonomic handle for added comfort. All components of the raceway system are designed to maintain a minimum one inch bend radius for both copper (making it Category 5e and 6 compliant) and fiber optic cable. Raceways can incorporate a wide variety of media, including UTP, STP, ScTP, Coaxial, Audio, Video and Fiber Optic. ICC's raceways utilize a one-piece adhesive back design with an integrated latching system for quick changes and ease of installation (RSS)
We will beat any US-Based Company's Price On CableTray or Raceway!
Raceway System Solutions- CabletraySystems-Cable tray-Cable trays-CabletraySystems-Raceway Systems- Flextray-Basket Tray
ITEM NUMBER
DESCRIPTION
Raceway3/4”, 1-1/4” and 1-3/4” Widths Raceway - Cable Tray
Runway- Raceway section is designed to support horizontal cable running over-head. Constructed of heavy duty 16-gauge steel with a durable powder coated finish, it can be easily attached to all ICC racks.
Part Number: ICCMSLST10
10 ft*., Runway, 12 in. Wide
*We Have Shorter Lengths!!
Runway- Raceway radius bend section is used to change the horizontal cable running over-head in a 90° vertical direction to route cables downward to a vertical ladder.
Part Number: ICCMSLOR90
Runway Radius Bend, 12 in. Wide
Runway-raceway radius bend section is used to change the horizontal cable running over-head in a 90° vertical direction to support ceiling cable entry.
Part Number:ICCMSLIR90
Runway Radius Bend, 12 in. Wide
Turn section is designed to change the horizontal cable running over-head in a 90° flat turn.
Runway- Raceway section is designed to support horizontal cable running over-head. Constructed of heavy duty 16-gauge steel with a durable powder coated finish, it can be easily attached to all ICC racks.
Part Number: ICCMSLST10
10 ft*., Runway, 12 in. Wide
*We Have Shorter Lengths!!
Runway- Raceway radius bend section is used to change the horizontal cable running over-head in a 90° vertical direction to route cables downward to a vertical ladder.
Part Number: ICCMSLOR90
Runway Radius Bend, 12 in. Wide
Runway-raceway radius bend section is used to change the horizontal cable running over-head in a 90° vertical direction to support ceiling cable entry.
Part Number:ICCMSLIR90
Runway Radius Bend, 12 in. Wide
Turn section is designed to change the horizontal cable running over-head in a 90° flat turn.
Part Number:ICCMSLFT90
Runway 90° Turn, 12 in. Wide
ELECTRIDUCT
Under Carpet Raceway - Cable Protector
Cable Protector Big brother to the Bumble Bee, the Yellow Jacket Cable Protector can handle up to 21,150 lbs per footprint. And with their many accessories and multiple channel designs, the YJ Series is still the BEST!
These cord covers are perfect and economical when you need cable protection for low traffic areas. Available in different colors, lengths and sizes. These cord covers are only good for ‘foot traffic’.
Protect your cable, wires, and hoses from foot, small carts, and vehicular traffic with the trusted Linebacker Series of Cord Covers! Whether it's a single channel drop-over or open-top to the more common General Purpose 5-Channel version to the dependable 2, 3, 4, & 5 channel Heavy Duty cable protectors.
Firestop Raceway Systems-Along with your raceway systems, please visit our new pages on firestop cable transit firestop. With each raceway system install, there may be a requirement to run your cable plant through a firewall, thereby requiring firestop. Please click on firestop.
We now carry Raceway Systems From the Manuacturers Below
We have just purchased thousands of feet of ADC 2", 4" 6" and 12" Fiberguide Raceway -See Below
West Coast (866) FIBER-21 --(866) 342-3721- East Coast (866) 650-3282
We now carry ADC Raceway-Click Here or Call (866)342-3721
ICC Raceway System Cutting Tool-Part# ICACSTPE60 ICC's new raceway cutting tool is intended for making raceway installations faster and easier. This new tool cuts and trims with much less effort and provides a clean smooth finish. Its clean cutting capability eliminates rough edges and allows the connectors and track sections to fit together better, creating a much cleaner overall installation. The tool incorporates a ratcheting design and an ergonomic handle for added comfort. All components of the raceway system are designed to maintain a minimum one inch bend radius for both copper (making it Category 5e and 6 compliant) and fiber optic cable. Raceways can incorporate a wide variety of media, including UTP, STP, ScTP, Coaxial, Audio, Video and Fiber Optic. ICC's raceways utilize a one-piece adhesive back design with an integrated latching system for quick changes and ease of installation (RSS)
We will beat any US-Based Company's Price On CableTray or Raceway!
Raceway System Solutions- CabletraySystems-Cable tray-Cable trays-CabletraySystems-Raceway Systems- Flextray-Basket Tray
We can ship most Cabletrayparts the same day!Snake Tray Cable Tray- Raceway® is pleased to announce the new larger size 18-inch wide and 4-inch deep Cabletraythat creates 72 square inches of cable path to hold over 1000 Cat5e (.21 OD) cables
National Data Supply offers raceway system solutions and Cabletraysystems from several manufacturer's including our new Snake Tray Cable Tray- Raceway raceway systems and cable trays featured above, Cable Manager cable tray, and Cablofil raceway, Cabletrayand raceway systems, Hendry raceway , Newton, DEK raceways, ICC standard raceways, and ICC's custom Raceway System Solutions (RSS). Designed to make installation simple and easy, Cablofil wire Cabletrayis truly a revolutionary advancement in cable management. Its easier because it requires fewer parts, making installation less complicated. That saves valuable time and money. A comprehensive range of accessories allows for every possible installation configuration. When youre looking for the most efficient cable management installation anywhere, you can rely on the Fast Assembly System (FAS) from Cablofil. FAS utilizes a simple one-step process that requires no screws, bolts or other tools. All you need is a screwdriver! Whether youre designing a new cable management system, or retrofitting an existing one, the FAS System allows you to save time and moneyfrom planning to installation.
Cable Mgr -Wiremaid Cabletrayand Raceway Systems
Cable Manager PRO-10 Cabletrayis an innovative and cost-effective system that easily adapts to the most difficult installations. Designed for the low voltage industry and developed with the architect, engineer and installer in mind, PRO-10's pre-fabricated junctions/intersections and ease of installation make it a cost-effective choice of contractors throughout the United States.
M.E.2 Cabletraymanagement system is manufactured with rigid .187 diameter zinc-plated steel wire, welded in a two inch by four inch grid facilitating easy cable break outs while supporting the cable. The open grid design prevents dirt build-up and dust experienced in closed cable trays.
Call For Pricing- Call (866) 342-3721 or click on the chat button on the top of the page
ICC Raceway Systems
National Data Supply offers raceway system solutions and Cabletraysystems from several manufacturer's including our new Snake Tray Cable Tray- Raceway raceway systems and cable trays featured above, Cable Manager cable tray, and Cablofil raceway, Cabletrayand raceway systems, Hendry raceway , Newton, DEK raceways, ICC standard raceways, and ICC's custom Raceway System Solutions (RSS).
PLEASE SEE ICC'S PARTIAL RACEWAY PRODUCTS LIST BELOW
ICC's raceway structured cabling solutions offer flexibility and ease of installation. Each component is skillfully engineered and crafted to provide a clean and secure system that fits virtually any open architectural environment.
ICC's new raceway cutting tool is intended for making raceway installations faster and easier. This new tool cuts and trims with much less effort and provides a clean smooth finish. Its clean cutting capability eliminates rough edges and allows the connectors and track sections to fit together better, creating a much cleaner overall installation. The tool incorporates a ratcheting design and an ergonomic handle for added comfort.
All components of the raceway system are designed to maintain a minimum one inch bend radius for both copper (making it Category 5e and 6 compliant) and fiber optic cable. Raceways can incorporate a wide variety of media, including UTP, STP, ScTP, Coaxial, Audio, Video and Fiber Optic. ICC's raceways utilize a one-piece adhesive back design with an integrated latching system for quick changes and ease of installation.
We also carry Premier Duct's new innerduct line of plenum, riser raceway and corrugated duct raceway. ICC, Wiremaid's Cable Manager and Snake Tray Cable Tray- Raceway's product lines offer flexibility and ease of installation. Each component is skillfully engineered and crafted to provide a clean and secure system that fits virtually any open architectural environment. Cable-Mgr.'s wire grid Cabletraysystems 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.
Call For New Pricing Today!
West Coast (866) 650- 3282 ------East Coast (866) 342-3721
ICC's new Elite Multi-Media Box has four separate knockouts for raceway system fittings and features rear access for cable entrance. ICC junction boxes allow easy cable access entry, contain cable routing posts for added stability, and are designed with raceway knockouts. All knockouts can be easily removed with pliers to accommodate all ICC raceway sizes. Made of 94V-0 rigid vinyl for low voltage (under 50V) communication cabling, the raceway is easy to cut, trim and can be painted in order to create a custom look.
All components of the Raceway System are designed to maintain a minimum 1 inch bend radius for both copper (making it Category 5, 5e and 6 compliant) and fiber optic cable. Raceways can incorporate a wide variety of media, including UTP, STP, ScTP, Coaxial, Audio, Video and Fiber Optic. ICC's raceways utilize a one-piece adhesive back design with an integrated latching system for quick changes and ease of installation.
ICC Raceway System Cutting Tool-Part# ICACSTPE60 This ICC Raceway System Cutting tool make cutting raceway a "snap".
West Coast (866) 650- 3282 ----East Coast (866) 342-3721
or talk to us by clicking the chat button at the top of the page
What is Cable Tray?
1. What is a CabletraySystem?
2. What standards / guidelines are available for Cabletraysystems?
3. What types of Cabletrayare available?
4. How do I know what type of Cabletrayis right for my application?
5. What materials / finishes are available for the various Cabletraysystems?
6. Now that I know what types of cable trays are available, what configurations are available?
7. After selecting the type of Cabletrayand configuration required, what support methods are available?
8. Before selecting the type of cable tray, Cabletrayconfiguration(s), and support method desired, what additional information do I need to supply to the Cabletraymanufacturer for them to best understand and satisfy my needs?
What is a CabletraySystem?
Per the National Electrical Code, a Cabletraysystem 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.
* Cabletrayis the bridge that allows for safe transport of wires across open spans.
* Therefore, think of Cabletrayas the structural component of a building's electrical system.
What standards / guidelines are available for Cabletraysystems?
1. The National Electrical Code publishes the standards for all types of electrical applications. Articles 318, 250, and 800 cover various aspects of Cabletraysystems.
2. NEMA, (National Electrical Manufacturers Association), is an association comprised of the major Cabletraymanufacturers in the industry. This committee has published three documents to date: NEMA VE1, FG1 and VE2.
NEMA VE1 covers general Cabletraydefinitions, 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 Cabletraysystems. Free download of this document is available on the NEMA website.
NEMA VE2 is a Cabletrayinstallation 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, (CabletrayInstitute), is a trade association comprised of the major Cabletraymanufacturers in the industry and was formed to provide specifiers, designers, and installers information on the advantages of using Cabletraysystems over other types of products. (i.e. conduit, ladder rack, etc.)
How do I know what type of Cabletrayis right for my application?
1. Ladder Cabletrayprovides:
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 Cabletrayis generally used in applications with intermediate to long support spans, 12 feet to 30 feet.
2. Solid Bottom Cabletrayprovides:
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 Cabletrayis generally used for minimal heat generating electrical or telecommunication applications with short to intermediate support spans of 5 feet to 12 feet.
3. Trough Cabletrayprovides:
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 Cabletrayis generally used for moderate heat generating applications with short to intermediate support spans of 5 feet to 12 feet.
4. Channel Cabletrayprovides:
1. an economical support for cable drops and branch cable runs from the backbone Cabletraysystem.
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 Cabletrayis 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 Cabletrayprovides:
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 Cabletrayprovides:
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 Cabletrayis 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 Cabletraysystems?
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 Cabletrayand 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, Cabletrayconfiguration(s), and support method desired, what additional information do I need to supply to the Cabletraymanufacturer 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, Cabletraymaterial, or Cabletraytype 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
CabletrayToday: An overview
The face of Cabletrayis changing to meet todays market needs
A few short years ago, Cabletraywas a "smoke stack" product, used primarily in heavy industrial facilities to support power cables. Today it is still servicing the industrial and power users, but it has also found its way into institutional and commercial applications, supporting telecom cabling systems. The reason for its rapidly changing characteristics is that the products are adapting to changing customer needs.
The electrical and telecom industries have discovered Cabletraystrengths, safety, speed of installation, openness for future change, adaptability, and today, the vast product selection tailored to particular needs.
Traditional two side rail cable tray
This grouping of product is from the old school. Its primary characteristic is as the product is defineda support system. In its heaviest form, cable trays are very efficient bridges that can span long distances, up to 30 feet, and carry amazing loads (Figure A).
These "bridges" can be built from steel, stainless steel, aluminum, and fiberglass. The carbon 0/2 steel can be hot dip galvanized after fabrication or mill galvanized. Each material/finish has its advantages and disadvantages.
Aluminum is the material of choice--excellent corrosion protection, light weight, high strength, no finish to specify or repair, ease of field fabrication, and more economical to install. The environment is the ultimate controller as to the material and/or finish of a system. 316 stainless steel or fiberglass may be required in some corrosive areas.
After the material /finish has been considered, the bottom type of Cabletrayneeds to be determined. Ladder, ventilated trough, solid bottom (trough) are common styles available. Ladder is the most common as it provides the most cable freedom and air circulation (for power cables).
For ladder-type systems, the rung spacing needs to be selected for the straight section. The most common rung spacing (not the standard) in the U.S. is nine inches. With certain exceptions, the rung spacing is controlled by the support requirements of the cables being supported. Longer rung spacings are more economical and provide added cable freedom but can affect the systems strength.
Ventilated trough systems are for very small cables requiring more support and solid bottom flat floor systems provide a safe resting place for delicate high tech cables that do not generate heat (Figure B).
The solid bottom metal system with solid metal covers also has applications in environmental air areas supporting non-plenum rated cables (Figure C).
It's important to note that a solid bottom, covered Cabletrayremains a Cabletrayand is not a wireway (tray-rated cables required).
The next issue is the strength requirement. Remember, these are support systems (bridges), so not only is it important to consider the load but the span (distance between supports) must be known. It is also important to consider other stresses the system must withstand--ice, wind, and snow loads. Needless to say, matching the system strength to the installation requirement is important.
As standard two side rail Cabletraysystems cover a wide range of sizes, strengths, and styles, so do their applications. The heaviest special systems can span 30 feet and are used when intermediate supports are impossible or impractical (over roadways, for example). The lightest systems are best suited for non-power, indoor installation where the span is from eight to ten feet. The mid-range between these extremes covers a vast amount of applications and can be found from offshore oilrigs to your county courthouse, supporting heavy power cables to fiber optic cables.
The traditional two-side rail Cabletrayproduct offering is the core of the domestic Cabletrayindustry. New systems are being developed to satisfy more specific customer needs.
Channel type cable systems are used as a flexible, low-cost means of connecting equipment to main tray runs. Often channel feeds power down to a pump or motor within an industrial facility.
The compact size of channel makes it easier to position around and connect to equipment. This style of Cabletrayis available non-ventilated or ventilated, as shown in (figure D).
Center supported cable trays
Today, another type of Cabletrayis available for cable support and management. These systems (Figure E) are manufactured from aluminum and steel, with aluminum again being the material of choice. The advantages of these types of Cabletrayare installation speed and maximum cable freedom. These systems were generated to allow installers to side fill the cables, eliminating the stresses of pulling cables. They install using a variety of connectors and couplings, as opposed to pre-manufactured fittings. This adds to the installation speed and simplicity. The applications of these systems are primarily to support datacom cabling systems.
The rungs pass through the center spine at the bottom, as shown in (Figure E), or through the top, as shown in (Figure F).
Both top or bottom mount systems allow the installer to lay cable in from the sides as opposed to pulling cables through trapeze type supports.
As not all installations or customer needs are the same, more specialized systems have developed. Wall-mounted racks are available (Figure G)
as well as multi-tiered systems (Figure H).
Wire basket systems
The newest cable support systems to hit our shores are wire basket systems (Figure I).
These systems are created from a steel wire two-inch by four-inch mesh. Their strengths are their low profile, unmatched installation adaptability, simplicity of accessories, and distribution stockable characteristics. Of the variety of finishes available, zinc plated is the most commonly used. These systems are not new to the world systems, as they are commonly used in Europe.
The 2x4 wire mesh construction (Figure J) offers some desired advantages not at first visible.
By cutting and removing segments of this system, it can be reformed and changed into "fittings" (Figure K). Installers will find these wire basket systems the most on-site adaptable of all the systems.
The wire baskets are being used primarily in the telecom sector of the market. As the acceptance increases and as distribution stock becomes more common, these systems can become an important part of the continuing Cabletrayevolution.
Cabletraytoday is ever changing, ever growing. It is doing what it should; it is evolving to satisfy a constantly changing set of customer needs. All of these systems have their strengths, all have their weaknesses. They are a growing part of the cable support products today and will continue to adapt and grow.
Standards
Standards affecting the two-side rail product groupings are: the applying electrical code, NEMA VE-1 or FG-1, UL classification, and NEMA VE-2. The applying electrical code depends on your area. Should it be the National Electrical Code, Article 318 will be of major interest. This document addresses cable fill allowed for different product types, where it can and cant be used, and the cable types it can support. The NEMA VE-1 and NEMA FG-1 standards address the manufacturing standards for metal (VE-1) and non-metallic (FG-1) systems. These publications contain the standards to which the National Electrical Manufacturers Association members manufacture their products. The NEMA VE-2 is a fairly new document created to be an installation guide.
At this time, there are no domestic standards that mention wire basket systems. The systems loading capabilities are being stated in terms that the U.S. standards do not address. The loading is being determined by continuous beam testing, and a specified deflection is the controlling factor. This type of testing is common in Europe and is part of the proposed IEC (International Electrotechnical Commission) Cabletrayspecification.
As the IEC spec will not be completed until sometime in 1999, the testing method being used is hard to define.