Cable Trays Technical Instructions & Specifications

Transcription

1 Cable Trays Technical Instructions & Specifications

2 Products Catalogue Objective and Structure The company s main objective is the supply of quality products, with respect to: practical design increased durability easy and quick installation reasonable cost minimum delivery time At the same time, the correct design and selection of the cable tray system is critical for the optimum performance of the system, both in technical and economical terms. For that reason, this catalogue is also a guide to the best selection and use of cable support products. This way, each project s specifications will be fully met with a system of minimum purchase, installation and maintenance costs. The first few pages provide some basic technical instructions for the correct selection of: corrosion resistance cable tray support type dimensions of supports and cable trays material thickness and distance between supports By following the instructions and the detailed product description of each product, engineers can easily select the correct item for each application. GUARANTEE METALLODOMI S.A. covers with limited guarantee of twe (2) years from the day of purchase for all the products manufactured Hot Dip Galvanized According to DIN EN ISO George Koundourakis General Manager Page 2

3 Corrosion Resistance Selection Our products are classified according to their corrosion resistance level as follows: 1. Products made of pre-galvanized sheet metal. Method: The sheet metal is dipped in zinc bath at 450 ο C according to the EN ISO standard. The resulting zinc layer has an average thickness of 20μm. The next step is punching and bending of the metal sheet. The surfaces resulting from cutting and punching are also protected against corrosion (up to 2mm of sheet thickness) due to the formation of zinc oxide. Use: Dry-air, indoor applications. 2. Products made of mild steel sheet and then hot-dip galvanized. Method: The mild steel sheet is punched and formed. The next step is hot-dip galvanizing according to the EN ISO 1461 standard. The resulting zinc thickness is about 60 μm. Use: Indoor applications with high moisture or outdoor applications. 3. Products made of stainless steel. Method: Stainless steel sheet is punched and formed. Use: Special applications, food or chemical industries and seaside installlations. Additional types of corrosion resistance can also be applied and offered: Products made of raw steel sheet, electro-galvanized Products made of mild steel sheet, hot-dip galvanized and epoxy powder coated. 4. Life span The life span of a zinc-coated material cannot be accurately predicted. However, it can be roughly estimated according to environmental conditions: Expected life metal (in years) Environment: Pre-galvanized Hot-dip galvanized Countryside: Coastal: Urban: Industrial: Page 3

4 Selection of Cable Support System Selection of dimensions: The basic criterion for selecting the suitable cable support system is the type and cross-section of the cables. For example, large cross-section cables which are energy carriers release significant quantities of heat, therefore they need to be routed using cable ladders in order to enable the air flow around the cables. Telephone, network, signal cables or even low power cables can be routed through cable trays. When the cross section and the number of cables to be routed are known, the suitable cable tray cross section can be estimated. The suggested selection process is the following: 1. The sum of cable cross sections is calculated. 2. The result is multiplied by a factor of 1.3 to take into account the random placement of the cables into the cable tray. 3. The new result is multiplied again with a minimum factor of 1.3 to consider some extra free space in the cable tray for possible additional cables to be routed through the cable tray in the future. 4. The cable tray cross section (width x height) that will be selected must be equal to or greater than the result of the above mentioned calculations. In order to facilitate calculations, the following table contains the dimensions of the most commonly used cables. It must be noted however that the values in the table are approximate. The respective tables of the cable manufacturer should be used for better results. Page 4

5 Diameters and Cross Sections of commonly used Cables Multi-thread Power Cables Single-thread Power Cables Type Diameter Cross section (mm) (cm 2 ) 1 x 4 6,5 0,33 1 x 6 7 0,38 1 x ,50 1 x 16 9,5 0,71 1 x 25 12,5 1,23 3 x 1,5 8,5 0,57 3 x 2,5 9,5 0,71 3 x ,95 4 x 1,5 9 0,64 4 x 2,5 10,5 0,87 4 x 4 12,5 1,23 4 x 6 13,5 1,43 4 x 10 16,5 2,14 4 x ,84 4 x 25 23,5 4,34 4 x ,31 5 x 1,5 9,5 0,71 5 x 2,5 11 0,95 5 x 4 13,5 1,43 5 x 6 14,5 1,65 5 x ,54 5 x 16 21,5 3,63 5 x ,31 7 x 1,5 10,5 0,87 7 x 2,5 13 1,33 Signal Cables Type Diameter Cross section (mm) (cm 2 ) 2 x 2 x 0,6 5 0,20 4 x 2 x 0,6 5,5 0,24 6 x 2 x 0,6 6,5 0,33 10 x 2 x 0,6 7,5 0,44 20 x 2 x 0,6 9 0,64 40 x 2 x 6,6 11 0,95 60 x 2 x 0,6 13 1, x 2 x 0,6 17 2, x 2 x 0,6 23 4,15 2 x 2 x 0,8 6 0,28 4 x 2 x 0,8 7 0,38 6 x 2 x 0,8 8,5 0,57 10 x 2 x 0,8 9,5 0,71 20 x 2 x 0,8 13 1,33 40 x 2 x 0,8 16,5 2,14 60 x 2 x 0,8 20 3, x 2 x 0,8 25,5 5, x 2 x 0,8 32 8,04 Type Diameter Cross section (mm) (cm 2 ) 1 x ,87 1 x 16 11,5 1,04 1 x 25 12,5 1,23 1 x 35 13,5 1,43 1 x 50 15,5 1,89 1 x 70 16,5 2,14 1 x 95 18,5 2,69 1 x ,5 3,30 1 x ,5 3,98 1 x ,91 1 x ,16 1 x ,07 3 x 1,5 11,5 1,04 3 x 2,5 12,5 1,23 3 x 10 17,5 2,41 3 x 16 19,5 2,99 3 x ,31 3 x ,07 3 x ,18 4 x 1,5 12,5 1,23 4 x 2,5 13,5 1,43 4 x 6 16,5 2,14 4 x 10 18,5 2,69 4 x 16 21,5 3,63 4 x 25 25,5 5,11 4 x ,16 4 x ,07 4 x ,08 4 x ,95 4 x ,85 4 x ,35 4 x ,24 4 x ,42 5 x 1,5 13,5 1,43 5 x 2,5 14,5 1,65 5 x 6 18,5 2,69 5 x 10 20,5 3,30 5 x 16 22,5 3,98 5 x 25 27,5 5,94 5 x ,08 5 x ,57 Page 5

6 Cable Weight Tables TECHNICAL INSTRUCTIONS Multi-thread Power Cables Type Type Signal Cables Weight (kg/m) 1 x 4 0,08 1 x 6 0,105 1 x 10 0,155 1 x 16 0,23 1 x 25 0,33 3 x 1,5 0,135 3 x 2,5 0,19 3 x 4 0,265 4 x 1,5 0,16 4 x 2,5 0,23 4 x 4 0,33 4 x 6 0,46 4 x 10 0,69 4 x 25 1,64 4 x 35 2,09 5 x 1 0,19 5 x 2,5 0,27 5 x 4 0,41 5 x 6 0,54 5 x 10 0,85 5 x 16 1,35 5 x 25 1,99 7 x 1,5 0,235 7 x 2,5 0,35 Weight (kg/m) 2 x 2 x 0,6 0,03 4 x 2 x 0,6 0,035 6 x 2 x 0,6 0,05 10 x 2 x 0,6 0, x 2 x 0,6 0,11 40 x 2 x 0,6 0,2 60 x 2 x 0,6 0, x 2 x 0,6 0, x 2 x 0,6 0,87 2 x 2 x 0,8 0,04 4 x 2 x 0,8 0,055 6 x 2 x 0,8 0,08 10 x 2 x 0,8 0, x 2 x 0,8 0, x 2 x 0,8 0,38 60 x 2 x 0,8 0, x 2 x 0,8 0, x 2 x 0,8 1,79 Cable weight calculation: In order to proceed with the selection of cable support system, the total cable weight per meter length must be calculated first. For this calculation, cable weights can be found in tables provided by cable manufacturers. Such a table is provided below. Single-thread Power Cables Type Weight (kg/m) 1 x 10 0,18 1 x 16 0,24 1 x 25 0,35 1 x 35 0,46 1 x 50 0,6 1 x 70 0,8 1 x 95 1,1 1 x 120 1,35 1 x 150 1,65 1 x 300 3,2 3 x 1,5 0,19 3 x 2,5 0,24 3 x 10 0,58 3 x 16 0,81 3 x 50 1,8 3 x 70 2,4 3 x x 1,5 0,22 4 x 2,5 0,29 4 x 6 0,4 4 x 16 1,05 4 x 25 1,6 4 x 35 1,75 4 x 50 2,3 4 x 70 3,1 4 x 95 4,2 4 x 120 5,2 4 x 150 6,4 4 x 185 8,05 4 x x 1,5 0,27 5 x 2,5 0,35 5 x 6 0,61 5 x 10 0,88 5 x 16 1,25 5 x 25 1,95 5 x 50 3,5 Page 6

7 COMMENTS CABLE LADDERS Cable ladders are the most common solution for supporting and routing of cables in an installation. For this reason, cable ladders are available in a variety of sizes and standards, in order to cover the wide range of applications. Cable ladders and their accessories are classified in series Η35, Η60, Η85 and Η110 according to their profile height. It must be noted that all products displayed as perforated in this catalogue, are available in non-perforated form as well. Cable ladders are delivered in 3-meter long pieces. Other lengths between 2.5m and 6m are available on request. The corrosion resistance level available for each product is noted in the following tables with the respective letter: P: Pre-galvanized metal sheet H: Hot-dip galvanized metal sheet S: Stainless steel metal sheet In addition, all available products can be delivered epoxy powder coated to any desired color. TYPE H110 STOCK LENGTH: 3000mm PRODUCT DESCRIPTION PERFORATION: for ease in cable mounting and vetilation, holes 7x30mm in crossshape and hole centers 50mm in x-axis and 25mm in y-axis are punched. BENDED EDGE: on top of side rail for reinforcement and cable protection. Cable ladders can be manufactured from steel sheet pregalvanized acc. to EN ISO and also available in stock hot-dip galvanized acc. to EN ISO On request cable ladders made of stainless steel sheets can be manufactured. Page 7

8 SELECTION OF METAL SHEET THICKNESS & DISTANCE BETWEEN SUPPORTS According to the total cable weight per meter that has been calculated, the metal sheet thickness and the distance between supports can be selected. In this catalogue, a chart is provided for every cable tray type that gives the maximum allowed load per unit length for any combination of sheet metal thickness and distance between supports. By using the charts, the selected cable support system will be both robust and cost effective. Selection of support type The two basic criteria for selecting the support type are: The mounting surface (floor, wall, or ceiling) The load to be supported Our products cover all combinations of mounting surface and load to be supported. MATERIAL THICKNESS t=0,75mm Page 8