Does cable tray have to be accessible?
Answer: The NEC does not have a specific installation clearance, but indicates in section 318-6(b) that cable trays should be exposed and accessible. Telecommunications standard TIA/EIA-569 recommends a minimum of 12-inch access headroom above the cable tray.
Are cable trays raceways?
Cable Tray Definition Cable tray is classified by the NEC (NFPA 70 the National Electrical Code) as a support system and not as a raceway. Generally speaking raceway completely encloses the cable inside of it.
What NEC article covers cable trays?
Article 392
The article covering cable trays and their installation requirements has been moved from Article 318 in the 1999 NEC to new Article 392 in the 2002 NEC. Cable trays are not limited to industrial facilities and can be installed in commercial and residential facilities.
What types of cables can be installed in cable tray systems?
Although less commonly used, several other types of cables are permitted to be installed in cable trays. These include: Type AC, CATV, NM, NMC, NMS, SE, USE and UF.
What is Wireways and cable trays?
Cable trays are for cables. A group of wires surrounded but an overall jacket. Wireways are for wires, Individual insulated conductors such as THHN. Wireways can also used for cables, but normally for low voltage cables.
Can you direct bury tray cable?
XLP/XPTC tray cable can be installed in free air, in raceways, or direct burial. It can be used in rough environments hence approved for wet or dry locations as well as Class 1 Division 2 hazardous locations.
Where can cable trays be used?
Cable trays are used as an alternative to open wiring or electrical conduit systems, and are commonly used for cable management in commercial and industrial construction.
What type of cable tray?
Type of Cable Trays: Ladder Type Cable Tray Solid Bottom Cable Tray Trough Cable Tray Channel Cable Tray Wire Mesh Cable Tray Single Rail Cable Tray
What are the dimensions of a cable tray?
The width varies from 25 mm to 600 mm and the height from 25 mm to 125 mm. Cable trays in user-specified dimension are available upon request. All cable trays are made from round materials which are gentle to cables and tubes.
What is a cable ladder tray?
Ladder Cable Tray is used to load cable and wire in industrial projects. The Width of Ladders is ranging from 150mm to 1200 mm and height ranging from 50 mm to 150 mm. Ladder cable tray side is formed by a molding machine to improve the overall bending capacity of it.
What is an electrical cable tray?
According to the National Electrical Code (NEC), a cable tray is a unit or assembly of units or sections and associated fittings forming a rigid structural system used to securely fasten or support cables and raceways.