Cable,Tray,Wring,System,you,ar business, insurance A to Z of Cable Tray Wring System
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If you are looking for or if you are in process ofinstalling cable tray wiring system, better you read this article to knowalmost everything about cable tray wiring system. What is a Cable Tray System?Per the National Electrical Code, a cable tray system is "a unit orassembly of units or sections and associated fittings forming a rigidstructural 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? Ladder Solid Bottom Trough Channel Wire Mesh Single Rail What materials / finishes are available for the various cable traysystems? Steel Aluminum Fiber Reinforced Plastic What types of cable trays are available, what configurations areavailable? Straight sections are available to route cables in a horizontal or vertical plane. 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. Covers are accessories and shouldn't be in here unless splices etc. are included. After selecting the type of cable tray and configuration required, whatsupport methods are available? Trapeze Support (Single or Multi-tier) Hanger rod clamps, "J" hangers Center Hung Support Wall Support Under floor Support Pipe stanchions or other structures Each of these support methods are preferable in different applications. Forinstance, trapeze supports may be desired in an application where cables willbe pulled through the cable tray. Center hung supports, on the other hand, aregenerally used when cables will be installed from the side of the cable tray.Center hung supports are especially useful when future cable additions aredesired. Wall supports and under floor supports are useful when ceilingstructure is not available or undesired. Outdoor installations are controlledby the structures available to support the cable tray.Is it common practice to use cable trays in thevertical position? It is common practice to use cable trays in the verticalposition. I have many photos of such installations. There is no problem. Cablesmust be fastened securely. Do they maintain their integrity during a 25 or 30year life of a plant? Yes, they do maintain their integrity. The only agingproblem could be the tie wraps, especially for single conductor cables. Is the percent filling of a vertical tray the sameas a horizontal cable tray? There are no differences between the cable fill requirementsfor vertical and horizontal cable tray installations. Can mechanical utility piping or tubing containingwater or compressed air be installed in cable trays with electrical cables? No. Cable trays are a support system for electrical cables,power, signal, and communication and optical fiber cables. What types of cablescan be installed in Cable Tray systems?They include: Power and Control Tray Cable Power Limited Tray Cable Optical Fiber Cables Fire Alarm Circuit Conductors Communication Cables Mineral Insulated (MI)Cable Metal Clad (MC) CableAnd other cables, including those specially approved forinstallation in cable trays. Medium voltage (type MV) and single conductorcables in sizes 1/0 and larger are permitted with some restrictions inIndustrial Establishments where qualified persons service the installation. Hope, all the information provided in this article will helpyou in deciding whether or not to g o for the cable tray wiring system.
Cable,Tray,Wring,System,you,ar