Snap Track Expansion Guidesto view All Expansion GuidesInstallation Guideline:Thermal expansion guides are recommended per NEMA VE-2 to provide longitudinal movement from a fixed point.When installing Snap Track Expansion Guides, two guides should be used and attached to each side rail.Installation Guideline:The should be anchored at the support nearest to its midpoint between expansion splices, and secured by expansion guides at all other support locations. The cable tray should be permitted longitudinal movement in both directions from that fixed point- NEMA VE-2 (Current Issue).Standard maybe used as expansion plates when secured to the tray with ¼” carriage bolts and nylon insert nuts.Do not strap tray or fitting covers within 3 ft. Of expansion guides.
And expansion in a cable tray installation. The length of the straight cable tray run and the temperature differential govern the number and spacing of expansion connectors. Expansion splice plates permit 2' of movement. Sold in pairs. ProduCt number fastener options 1314 Cd s6 C atalog numbering example: Connector System No.† Fasteners 4a2. Of the cable tray, or where expansion joints occur in the supporting structure. Cross Connector Bracket. For field connecting crossing section. Furnished in pairs with 3/8' hardware. Conduit to Cable Tray Adaptor. For easy attachment of conduit terminating at a cable tray.
PROCEDURE FOR CABLE TRAY SYSTEM INSTALLATION1. All cable trays & accessories received at site shall be inspected, handled and stored upon receipt in accordance with Project Procedure for Material Control.2. Inspections shall be conducted by the Electrical contractor, Electrical QC Inspector and Company representative in accordance with Inspection & Test Plan (ITP) inspection test plan.3.
Cable trays and covers for electrical & instrumentation cables shall be manufactured from hot dip galvanized carbon steel matching to project requirement specifications.4. Cable trays shall be self supporting type with a wide flange (48mm or 72mm or 100mm) in accordance with cable cross section.5. Cable trays shall preferably be installed flat in buildings or operating structures. Tray shall run as far as possible under flooring and walkways. Only in special cases shall cable trays be installed vertically or on edge.
On vertical cable trays and on edgewise – horizontal cable trays, each cable shall be fixed with 20mm wide stainless steel strips (two per meter). On horizontal cable trays, laid flat cables are fixed in group (one fastening for every two or three meters). On pipe racks, cable tray shall run on the top most level(s). Cable trays shall be fixed onto standard steel shapes, welded to steel structures or fixed on to concrete structures with self-drilling dowels. Distance between fixing points and cable tray support spacing shall be a maximum of three meter for ladder type tray and two meter maximum for perforated tray so as to avoid strain on cable trays.7.
Cable trays shall be designed to carry a load of 100kg/m. All cable trays shall be perforated or ladder type to avoid the retention of water and to allow fastening of the cables.8. Cable trays shall be provided with covers where there is high risk of mechanical damage during normal operation or maintenance periods. Cover fabrication shall be the same as that of cable trays themselves and shall be fixed on cable trays with proper clips recommended by cable tray Manufacturer/Vendor and comply with project required specification.9. The number of single or multi-conductor cables rated 11kV, 6.6kV, 1kV or less in cable trays shall include an allowance of 20% extra space for future expansion.10. Separate racking/trays shall be installed for the following electrical systems, generally arranged top to bottom manner.a.) HV and MV cablesb.) LV Power, Lighting and Control cables for non-instrument cablesc.) Instrument Cables (Electronic and Signal Cables)d.) Telecommunication Cables. Ensure sufficient space provided and maintained for cable tray to permit adequate access for installing & maintaining the cable.Ensure that cable trays are exposed and accessible for installation.Cable tray sections, fittings and connected raceways shall be bonded using bolted mechanical connectors or bonding jumpers.
CHECK THE SIZE, MATERIAL AND ACCESSORIES AS PER ISSUED FOR CONSTRUCTION (IFC) DRAWINGS AND PROJECT SPECIFICATION REQUIREMENTS.2. CHECK FITTINGS, BENDS & SUPPORTS ARE CORRECTLY INSTALLED AS PER DRAWINGS/SPECIFICATIONS.3. CHECK PROPER SPACING OF SUPPORTS & CLEARANCES FROM OTHER STRUCTURE/EQUIPMENT OF CABLE TRAY/LADDER.4. VERIFY CORRECT ROUTING OF CABLE TRAY/LADDER AS PER ISSUED FOR CONSTRUCTION DRAWINGS.5. CHECK BONDING JUMPER& COVER WAS PROPERLY INSTALLED.6. ENSURE NO SHARP EDGES & BURR THAT WOULD CUT OR DAMAGE THE CABLES.6. CHECK EARTHING CONNECTION TO MAIN GRID & CONTINUITY OF CABLE TRAY/LADDER AS PER SPECIFICATION.7.
CHECK COMPLETE CABLE TRAY/LADDER SYSTEM INSTALLATION.INTERNATIONAL REFERENCES FOR CABLE TRAY.