| What is Cable Tray? | | | | varied and multiple purposes. The uses are varied |
| Cable trays are ideally used for building and | | | | and can be used extensively. |
| construction purposes. Cable trays are used to | | | | |
| hold up and distribute cables. Steel, plastic, | | | | A cable tray normally is used and functions for |
| aluminum, Fiberglass are mostly used to make | | | | the following purposes: |
| cable trays. | | | | - Cable trays support cable the way that |
| These trays are easy to customize because of | | | | roadway bridges support traffic. |
| its variety in sizes and shapes. The user can | | | | - A bridge is a structure that provides safe |
| choose from Straight, L-shape, T-shape, and | | | | passage for traffic across open spans. |
| X-shape cable trays that can also be mixed and | | | | - Cable tray is the bridge that allows for safe |
| matched. These different shapes of cable trays | | | | transport of wires across open spans. |
| can be interconnected using common splice | | | | - Therefore, think of cable tray as the structural |
| washer clamps. They all provide ease in cable | | | | component of a building's electrical system. |
| routing because of its 2x4 inch grid and factory | | | | Cable Trays can be used outdoor and because of |
| fabricated junction that cuts down time and cost | | | | their powder coating they are corrosion |
| of installation. Cable trays can be installed on | | | | protected, however they do not have a specific |
| ceilings, walls, or under raised flooring. | | | | approval and they should not be used in an |
| Importance of cable tray- | | | | environment where there is extreme salt content |
| In any electrical installation, the structure type | | | | because it will eventually corrode. |
| used to support, fasten, direct, and protect the | | | | The types of cables permitted by the 2005 NEC |
| installed wire and cable runs is critical. That's why | | | | for installation in cable tray systems are indicated |
| choosing the appropriate pathway is so important. | | | | in Section 392.3 uses permitted, (a) Wiring |
| Various places where cable trays are preferably | | | | Methods. They include: |
| used: | | | | |
| - Houses | | | | - Power and Control Tray Cable (Type |
| - Stores | | | | TC)—NEC Article 336 |
| - Buildings | | | | - Power Limited Tray Cable (Type PLTC)—NEC |
| | | | | Sections 725-61(C) and 725.82(E) Instrument Tray |
| Types of cable tray available: | | | | Cable (Type ITC)—NEC Article 727 |
| - Ladder | | | | - Optical Fiber Cables—Article 770 |
| - Solid Bottom | | | | - Fire Alarm Circuit Conductors—Article 760 |
| - Trough | | | | - Communication Cables—Article 800 |
| - Channel | | | | - Mineral Insulated (MI) Cable—Article 332 |
| - Wire Mesh | | | | - Metal Clad (MC) Cable—Article 330 |
| - Single Rail | | | | - Other cables, including those specially approved |
| | | | | for installation in cable trays. Medium voltage (type |
| Other types of cable tray include: | | | | MV) and single conductor cables in sizes 1/0 and |
| Solid Bottom Cable Tray | | | | larger are permitted with some restrictions in |
| Trough Cable Tray | | | | Industrial Establishments where qualified persons |
| Channel Cable Tray | | | | service the installation. |
| Wire Mesh Cable | | | | |
| Tray Single Rail Cable Tray | | | | These guidelines permit engineering companies to |
| Perforated type cable tray | | | | select and install the necessary type of Cable |
| | | | | tray. These regulations entrust proper usage and |
| These various types of cable tray are used for | | | | no misuse of the cable tray. |