Learn more about the newest addition to the cablofil cable tray products. Universal has developed a simple sevenstep process to guide you in the process. Reference method f in free air or on a perforated cable tray horizontal or vertical touching spaced by one diameter 3 or 4 cables, three phase a. Select the material best suited to your environment.
This selection will lead to the best material for your application. Ladder cable tray is used for about 75 percent of the cable tray wiring system installations. Change is a complex problem when conduit banks are involved. Cables selection guide view our extensive range of cables and accessories.
Select the type of traythere are three different types of cable tray. The secure connection is ul classified and tested to be a. Best practice guide to cable ladder and cable tray. This allows the heat produced in the cables conductors to effectively dissipate. These corrections are viewable below under complimentary documents. A conduit wiring system is often a poor choice because large conduit banks. Calculate size of cable tray excel sheet electrical. Cable tray wiring systems are well suited for computer aided design drawings. Aluminum cable tray straight cover number selection. Ieee guide for the design and installation of cable systems in.
This article will be a good reference guide for how to size a cable, and we will also include a pdf version. Facilities with high density wiring systems devoted to control, instrumentation, data handling and branch circuit wiring have the choice of selecting cable tray or conduit wiring systems. Cable tray must be supported on spans shorter than or equal to the length of the cable tray being installed. Find product information quickly and easily with the 2016 17 cablofil. Download now for a product quick selection guide and overview of the offering. Eatons bline business is a global provider of innovative, laborsaving cable management systems, support systems, and enclosure solutions for engineered facility subsystem applications. Calculate cable tray width calculate cable tray area calculate cable tray length calculate cable tray weight calculate remaining width of cable tray calculate remaining area of cable tray free download. Cable tray selection process technical information a number of basic decisions must be made before a cable tray system can be specified. Ieee guide for the design and installation of cable.
Cable tray selection process selection process technical information a number of basic decisions must be made before a cable tray system can be specified. In addition, major cost savings are generated by the relative ease of installation. Ullisted subject 1277 for indooroutdoor installations in cable tray, trough, channel, duct, wireways, direct burial and aerial where supported by messenger. With a full range of cable support solutions, we offer one of the lowest lifetime cost of ownership. A ladder cable tray without covers permits the maximum free flow of air across the cables. The innovative, self connecting magic ends allow installers to connect tray lengths in a single snap. The bulletin is advisory in nature, informational in content, and is intended to assist employers in providing a safe and healthful workplace. The ladder cable tray must have an inside available width equal to or greater than the sum of the diameters sd of the cables, which must be installed in a single. As i am having a problem with the selection of cable if i am using a centrilised ac of 12 tr. The cable tray institute cti was founded in 1991 to support the cable tray industry by engaging in research, development, education, and the dissemination of information designed to promote, enhance, and increase the visibility of the industry. Arranged the annexes to better follow the flow of control cable systems selection and design e expanded and updated the annex for cable selection to include a table of common cable sizes.
If scheduling permits, freight costs for ladder tray can be greatly reduced if shipped with other project items e. Catalog material number to be prefix furnished a aluminum p pregalvanized g hot dip galvanized zn zinc plated s plain steel ss4 type 304 stainless steel ss6 type 316 stainless steel. The ladderperforated type cable tray shall be made out of min. From data centers to robotics to patient monitoring equipment, were committed to enabling the next generation of faster. Addresses shipping, handling, storing and installing cable tray systems. The value for we will be added to the static weight of cables in the tray. Select tray sizethere are different widths and heights of cable tray and what you require will depend on number, size, spacing and weight of the cables in the tray. Complete cable tray manual for electrical engineers and. How to size a cable, conductor sizing per the nec national electrical code experts in the usa. If any section of a part number is a different color, the part will typically ship with the longer lead time represented by the colors. Number of multiconductor cables rated 2000 volts or less. How to size a cable correctly stepbystep comprehensive. Explore our product lines and configure systems that work for your space. Safely installing, maintaining and inspecting cable trays.
The cable tray types to choose from are ladder, ventilated trough, or solid bottom. Most cable tray systems are fabricated from a corrosionresistant metal. You have determined you need a ladder tray aluminum at a 20 ft span and 100 lbsft load. Life to first maintenance for a selection of zinc coating systems in a range. Installation guide unitray cable tray systems, support. It is the predominate cable tray type due to its many desirable features. Cable ladder systems and cable tray systems are designed for use as supports for cables and not as enclosures giving full mechanical protection. What are the reasons for selecting a specific type of cable tray. For complete details on the cable tray selection process, see page a8.
Channel cable tray accessories eaton e7 bline series cable tray systems channel to floor base plate the channel to floor base plate is used to attach the end of a cable channel run to the floor or to an equipment mounting pad. Cable tray systems, including trays, supports, fittings and other materials, are generally much less expensive than conduit wiring systems. Nithiyananthan 38 figure 2 shows rating factors to be included for. Due to the ratio of ladder trays bulk to its weight, the freight costs for tray are higher than other metallic products. Electrical or communication cabling secured to cable tray in harsh environment. With a full range of cable support solutions, we offer one of.
Best practice guide to cable ladder and cable tray systems. Information on maintenance and system modification is also provided. To properly evaluate a cable tray wiring system vs. Code standard widths are available in 15cm, 30cm, 45cm, 60cm, 75cm, and 90cm. Individual rungs will support without collapse a 200 lb. For more information refer to the cable tray manual pages man1 thru man53 or call us at 18008517415. They are not intended to be used as ladders, walk ways or support for people as this can cause personal injury and also damage the system and any installed cables.
An effective cable sizing procedure model for industries an d commerial buildings dr. Safely installing, maintaining and inspecting cable trays this safety and health information bulletin shib is not a standard or regulation, and it creates no new legal obligations. These limits should not be used for cables subjected to pulling tensions during installation. The self connecting cable tray that started it all. Cable tray wiring systems are the preferred wiring system when they are evaluated against equivalent conduit wiring systems in terms of safety, dependability, space and cost.
Inumber of multiconductor cables rated 2000 volts or less in the cable tray 1 40 or larger cables the ladder cable tray must have an inside available width equal to or greater than the sum of the diameters sd of the cables, which must be installed in a single layer. Life to first maintenance for a selection of zinc coating systems in a range of corrosivity. Corrections were incorporated into this standard on 282016. The only reason to select a ventilated trough cable tray over a ladder type cable tray is. Cable pullers cable puller selection guide 6001 6800 page no. Support locations for cable ladder fittings and cable tray fittings. Cable trays simplify the wiring system design process and reduces the number of details. Resistance to extreme temperatures, chemicals, saltwater spray.
Beama best practice guide to cable ladder and cable tray systems including channel support systems and other associated supports companies involved in the preparation of this guide. I agree not to alter the publication in any way and agree not to change. Labor costs of installing a cable tray system can run up to 50 percent less. Cable typedescription ground plane flat cable ground plane flat cable ground plane flat cable. A small amount of engineering is required to change the width of a cable tray to gain additional wiring space capacity. Next, go to the cable tray selection chart, locate the proper class in the left hand column, and then read across the. Each part of our selection chart is shown in colors.
Cable tray selection tables for actual loading capacity see load tables in this section since it accommodates the most cable in the least space, flangein husky ladder is typically used in applications where strength and reliability are important, but space is limited. Single rail cable tray 1 ladder cable tray generally used in applications with intermediate to long support spans 12 to 30 feet. The final drawings for a cable tray wiring system may be completed and sent out for bid or construction more quickly than for a conduit wiring system. Products from our rs pro range bring you high quality, professionally approved rs brand products, while our wide. When using solid bottom cable tray, the sum of the cable diameters is not to. An evaluation of the costs and benefits of various wiring systems should be done in the design phase. Cable tray selection process cable trays manufacturers. Cable tray and cable management nema catalog eaton. Power cable installation guide figure f5 multiple sheaves figure f6 sheave arrangements for feeding into cable tray training radius the training radius is the final positioning of cable ends after the cable has been placed in the raceway. How to determine the correct cable tray type first, look up the desired support span and load designation in the nema load class table to determine the correct class of tray. Learn how to select the appropriate tray for your network centers and what factors to be aware of when making your selection. Grmagic cable tray is a patented selfconnecting wire mesh tray solution. We wrote this article because every single day we are asked by electrical engineers, electrical contractors, and others in the electrical construction field about how to size a cable.
88 584 565 1080 438 1444 719 884 524 735 652 1439 150 316 299 626 1324 573 1302 235 1242 918 571 1042 510 150 797 1109 325