Support locations of cable tray straight in a continuous run should follow the _ rule. Deflection of non-metallic cable tray can be adversely affected by _ġ6. If a cable tray system will be subjected to thermal expansion and contraction, expansion splice plates must be considered during the installation T/Fġ5. Pre-galvanizing is the most widely used coating for steel cable tray. fittings are subject to NEMA/CSA load ratings T/Fġ3. Aluminum is often the material of choice for cable tray installations because it _ (is corrosion resistant in certain environmnents, is lightweight, has a high strength-to-weight ratio, is maintenance free, is nonmagnetic)ġ2. Lengths of straight sections of cable tray are generally manufactred in which of the following lengths (10', 12',20',24',25')ġ1. NEMA VE 2 addresses which of the following (handling, load capacity, maintenance, modification, shipping, storing)ġ0. USE ONLY AS A MECHANICAL SUPPORT FOR CABLES., or noneĩ. Each cable tray fitting must be marked with which of the following ( manufacturer's name or trademark, type of material, "WARNING DO NOT USE AS A WALKWAY, LADDER,OR SUPPORT FOR PERSONNEL. Covers for cable trays should generally be installed _ (in a vertical tray run accessible by pedestrian & vehicular traffic, where falling objects may damage cables, outdoors, all)Ĩ. A cable tray having openings on the bottom sufficient for the passage of air and utilizing 75% or less of the plan area of the surface to support cables is known as a _ħ. Cable trays containing conductors rated over 600 volts must have a permanent, legible warning notice carrying the wording "DANGER-HIGH VOLTAGE-KEEP AWAY" placed in a readily visible position on all cable trays. _ specifies the requirements for fiberglass cable trays and associated fittings designed for use in accordance with the requirements of the NECĤ A _ is a prefabricated metal structure consisting of two longitudinal side rails connected by individual transverse membersĥ. (aluminum, stainless steel, pre-galvanized steel, hot-dip galvanized steel, all of the above)ģ. A cable tray system is defined as a system of raceways and associated fittings used to securely fasten or support cables. Code and Pract ch 4 Introduction to cable tray systems Questionġ.
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