Cable Tray Installation Standards

Usually show that the installed cable tray wiring system will cost 10 to 60 percent less than an equivalent conduit wiring system.

Cable tray installation standards.

Nema stands for the national electrical manufacturer s association. Nema ve 2 this standard is a practical guideline used by engineers contractors and maintenance personnel for the proper shipping handling storing maintenance and installation of both metal and nonmetallic cable tray systems. Main keywords for this article are cable tray installation details with pictures cable tray installation details dwg cable tray installation drawings cable tray support span calculation cable tray support brackets. The amount of cost savings depends on the complexity and size of the installation.

2000 and bs en 10143. 4 2 3 galvanised cable trays all galvanised cable trays shall be manufactured from pre galvanised mild steel to bs en 10142. Electrical and industrial power management solutions eaton. Sheaves or a shoe may be used to guide the cable into the tray.

Cable tray systems design shall comply with nec article 392 nema ve 1 and nema fg 1 and follow safe work practices as described in nfpa 70e. Cable tray and cable fittings shall be fully perforated slot sizes shall be 20mm x 7mm or similar running. It is recommended that the work described in this guide is carried out by competent persons who are familiar with the products being installed and the safety standards associated with them. Figure f 3 cable feed into cable tray d cable sheaves or a shoe may be used to guide cable into the desired direction maintain minimum bend radius and reduce friction.

There are other savings in addition to the initial installation cost savings for cable tray wiring systems over conduit wiring systems. The standard iec 61 537 is the product standard defining the requirements and test methods for the cable tray and cable ladder systems. Ve2 is a nema standard that outlines cable tray installation practices material control and unloading storage standards. Being the only standard harmonized at european level it is the reference when marking ce on the products as requested in the lvd.

For cable tray installers this publication is intended as a practical guide for the proper installation of cable tray systems. Nema ratings are standards that define the types of environments an electrical enclosure can be used in. C from cable reel to cable tray the cable is fed from the top of the reel to main tain required curvature. Electrical power system design calculations in process industry leave a reply.