Cable Trays For Electrical SystemsME- Building Group

SECTION 260536 – CABLE TRAYS FOR ELECTRICAL SYSTEMS

PART 1 - GENERAL

1.1RELATED DOCUMENTS

  1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this Section.

1.2SUMMARY

  1. This Section includes cable trays and accessories.

1.3ACTION SUBMITTALS

  1. Product Data: For each type of product.
  2. Include data indicating dimensions and finishes for each type of cable tray indicated.
  3. Shop Drawings: For each type of cable tray.
  4. Show fabrication and installation details of cable trays, including plans, elevations, and sections of components and attachments to other construction elements. Designate components and accessories, including clamps, brackets, hanger rods, splice-plate connectors, expansion-joint assemblies, straight lengths, and fittings.

1.4QUALITY ASSURANCE

  1. Source Limitations: Obtain cable trays and components through one source from a single manufacturer.
  2. Listing and Labeling: Provide cable trays and accessories specified in this Section that are listed and labeled.
  3. The Terms "Listed" and "Labeled": As defined in NFPA70, Article100.
  4. Comply with NEMAVE1 "Metal Cable Tray Systems" for materials, sizes, and configurations.
  5. Comply with NFPA70.

1.5COORDINATION

  1. Coordinate layout and installation of cable tray with other installations.
  2. Install cable tray at locations and elevations indicated.
  3. Submit proposed deviations to Owner for approval before installation.

PART 2 - PRODUCTS

2.1MANUFACTURERS

  1. Manufacturers: Unless otherwise directed by the Owner, provide products by one of the following:
  2. B-Line Systems, Inc.
  3. Chalfant Cable Trays.
  4. Husky: MP Husky Corp.
  5. P-W Industries, Inc.

2.2MATERIALS AND FINISHES

  1. Cable Trays, Fittings, and Accessories:
  2. Material and Finish: Aluminum Association alloy 6063-T6 for rails, rungs, and cable trays, and alloy 5052-H32 or 6061-T6 for fabricated parts.
  3. Type: Ladder.
  4. Cross-Rung Spacing: 9 inches on center.
  5. Minimum Fitting Inside Radius: 36 inches.
  6. Minimum Inside Depth: Load depth, 4 inches.
  7. NEMA VE 1 Load/Span Class: 12C.

2.3CABLE TRAY ACCESSORIES

  1. Fittings: Tees, crosses, risers, elbows, and other fittings as indicated, of same materials and finishes as cable tray.
  2. Cable tray supports and connectors, including bonding jumpers, as recommended by cable tray manufacturer.

2.4WARNING SIGNS

  1. Lettering: 1-1/2-inch-high black letters on yellow background with legend "WARNING! NOT TO BE USED AS WALKWAY, LADDER, OR SUPPORT FOR LADDERS OR PERSONNEL."
  2. Materials and fastening are specified in Division26 Section "Identification for Electrical Systems."

2.5SOURCE QUALITY CONTROL

  1. Perform design and production tests according to NEMAVE1.

PART 3 - EXECUTION

3.1EXAMINATION

  1. Examine substrates for compliance with requirements for installation tolerances and other conditions affecting performance of cable trays. Do not proceed with installation until unsatisfactory conditions have been corrected.

3.2INSTALLATION

  1. Install cable tray level and plumb according to manufacturer's written instructions, Coordination Drawings, original design, and referenced standards.
  2. Make changes in direction and elevation using standard fittings.
  3. Install cable trays with sufficient space to permit access for installing cables.
  4. Install expansion connections where tray crosses a building expansion joint.
  5. Space expansion connectors and set gaps according to NEMAVE1.
  6. Remove burrs and sharp edges from cable trays before installing cables.
  7. All cable trays where penetrate floors shall have a protective covers starting at floor level and up to 10'-0", Protective covers shall be provided as part of the cable tray and manufactured by the same cable tray manufacturer
  8. Provide cable tray supports fastened securely to building structure as specified in Division26 Section "Common Work Results for Electrical," unless otherwise indicated.
  9. Locate and install supports according to NEMAVE1.
  10. Design supports, including fastenings to the structure, to carry the greater of the calculated load multiplied by a safety factor of 4 or the calculated load plus 200 lbs.
  11. Grounding.
  12. Install a #4/0 bare copper ground cable the entire length of cable trays.
  13. Provide splices to connect all ground cables at Tee and Cross fittings.
  14. Install cable such that no power cable space is lost inside of tray.
  15. Provide cable clamp that effectively bonds cable to each section and fitting.
  16. Connect tray ground cable to switchgear, substation and busway ground bus.
  17. Test to ensure electrical continuity of connections.
  18. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. Where manufacturer's torque values are not indicated, use those specified in UL486A and UL486B.

3.3WARNING SIGNS

  1. After installation of cable trays is completed, install warning signs in visible locations on or near cable trays.

3.4CLEANING

  1. On completion of cable tray installation, including fittings, inspect exposed finish.
  2. Remove dirt, construction debris and other foreign objects from tray and cables.

3.5PROTECTION

  1. Provide protection and maintain conditions that ensure cable tray is without damage or deterioration.

END OF SECTION

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Revision Date: 01/21/14 Project & Bid Package

File name: 260536 CABLE TRAYS FOR ELECTRICAL SYSTEMS