Raceways and Boxes For Electrical Systems ME- Building Group

SECTION 260533 - RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS

PART 1 - GENERAL

1.1  RELATED DOCUMENTS

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

1.2  SUMMARY

  1. This Section includes raceways, fittings, boxes, enclosures, and cabinets for electrical wiring.

1.3  SUBMITTALS

  1. Product Data: For surface raceways, wireways and fittings, floor boxes, hinged-cover enclosures, and cabinets.
  2. LEED Submittals:
  3. Product Data for CreditIEQ4.1: For solvent cements and adhesive primers, documentation including printed statement of VOC content.

1.4  QUALITY ASSURANCE

  1. Listing and Labeling: Provide raceways and boxes specified in this Section that are listed and labeled.
  2. The Terms "Listed" and "Labeled": As defined in NFPA70, Article100.
  3. Comply with NECA "Standard of Installation."
  4. Comply with NFPA70.

1.5  COORDINATION

  1. Coordinate layout and installation of raceways and boxes with other construction elements to ensure adequate headroom, working clearance, and access.
  2. Provide a layout and installation of raceways and boxes to result in the maximum free area remaining in truss spaces for process utilities installed under other contracts.
  3. Coordinate installation with other trades.
  4. Route upward, and then horizontally near roof to maximize space for other utilities.
  5. Avoid flanges of members that support hangers of other systems.

PART 2 - PRODUCTS

2.1  MANUFACTURERS

  1. Manufacturers: Unless otherwise directed by the Owner, provide products by one of the following:
  2. Metal Conduit and Tubing
  3. Anamet, Inc.; Anaconda Metal Hose.
  4. Grinnell Co.; Allied Tube and Conduit Div.
  5. Triangle PWC, Inc.
  6. Nonmetallic Conduit and Tubing
  7. George-Ingraham Corp.
  8. Lamson & Sessions; Carlon Electrical Products.
  9. Conduit Bodies and Fittings
  10. Crouse-Hinds; Div. of Cooper Industries.
  11. Emerson Electric Co.; Appleton Electric Co.
  12. Hubbell, Inc.; Killark Electric Manufacturing Co.
  13. O-Z/Gedney; Unit of General Signal.
  14. Metal Wireways
  15. Hoffman Engineering Co.
  16. Square D Co.
  17. Surface Metal Raceways
  18. Wiremold Co. (The); Electrical Sales Division.
  19. Boxes, Enclosures, and Cabinets
  20. Appleton Electric Co.
  21. Crouse-Hinds; Div. of Cooper Industries.
  22. Hubbell Inc.; Killark Electric Manufacturing Co.
  23. Hubbell Inc.; Raco, Inc.
  24. O-Z/Gedney; Unit of General Signal.

2.2  METAL CONDUIT AND TUBING

  1. Rigid Steel Conduit: ANSIC80.1.
  2. IMC (Intermediate Metal Conduit): ANSIC80.6.
  3. EMT (Electrical Metallic Tubing) and Fittings: ANSIC80.3.
  4. Fittings: Compression type. Setscrew type not acceptable.
  5. FMC (Flexible Metal Conduit): Zinc-coated steel.
  6. LFMC (Liquidtight Flexible Metal Conduit): Flexible steel conduit with PVC jacket.
  7. Fittings: NEMAFB1; compatible with conduit/tubing materials.

2.3  NONMETALLIC CONDUIT AND TUBING

  1. ENT (Electrical Nonmetallic Tubing): NEMATC13.
  2. RNC (Rigid Nonmetallic Conduit): NEMATC2, Schedule 40 or 80 PVC.
  3. ENT and RNC Fittings: NEMATC3; match to conduit or conduit/tubing type and material.
  4. LFNC (Liquidtight Flexible Nonmetallic Conduit): UL1660.

2.4  METAL WIREWAYS

  1. Material: Sheet metal sized and shaped as indicated.
  2. Fittings and Accessories: Include couplings, offsets, elbows, expansion joints, adapters, hold-down straps, end caps, and other fittings to match and mate with wireways as required for complete system.
  3. Select features, unless otherwise indicated, as required to complete wiring system and to comply with NFPA70.
  4. Wireway Covers: Hinged type.
  5. Finish: Manufacturer's standard enamel finish.

2.5  OUTLET AND DEVICE BOXES

  1. Sheet Metal Boxes: NEMAOS1.
  2. Cast-Metal Boxes: NEMAFB1, TypeFD, cast box with gasketed cover.

2.6  PULL AND JUNCTION BOXES

  1. Small Sheet Metal Boxes: NEMAOS1.
  2. Cast-Metal Boxes: NEMAFB1, cast aluminum with gasketed cover.

2.7  ENCLOSURES AND CABINETS

  1. Hinged-Cover Enclosures:
  2. NEMA250, Type (1, 3R, 4, 7, 12, etc.) as specified
  3. Galvanized steel box
  4. Continuous hinged cover with flush latch.
  5. Finished inside and out with manufacturer's standard enamel.
  6. Cabinets:
  7. NEMA250, Type (1, 3R, 4, 7, 12, etc.) as specified
  8. Galvanized steel box
  9. Removable interior panel.
  10. Finished inside and out with manufacturer's standard enamel.
  11. Hinged door in front cover with flush latch and concealed hinge.
  12. Provide locks keyed to match key of panelboards.
  13. Provide metal barriers to separate wiring of different systems and voltage,
  14. Provide accessory feet where required for freestanding equipment.

PART 3 - EXECUTION

3.1  EXAMINATION

  1. Examine surfaces to receive raceways, boxes, enclosures, and cabinets for compliance with installation tolerances and other conditions affecting performance of raceway installation. Do not proceed with installation until unsatisfactory conditions have been corrected.

3.2  WIRING METHODS

  1. Outdoors: Use the following wiring methods:
  2. Exposed: Rigid steel or IMC.
  3. Concealed: Rigid steel or IMC.
  4. Underground: Direct buried, concrete encased, or duct bank, as indicated.
  5. Connection to Vibrating Equipment (Including Transformers and Hydraulic, Pneumatic, Electric Solenoid, or Motor-Driven Equipment): LFMC.
  6. Boxes and Enclosures: NEMA250, Type3R or Type4.
  7. Indoors: Use the following wiring methods:
  8. Exposed: Rigid steel conduit to 10 feet above floor and EMT above that point.
  9. Concealed: EMT.
  10. Connection to Vibrating Equipment (Including Transformers and Hydraulic, Pneumatic, Electric Solenoid, or Motor-Driven Equipment): FMC; except in wet or damp locations, use LFMC.
  11. Damp or Wet Locations: Rigid steel conduit.
  12. Boxes and Enclosures: NEMA250, Type1, except as follows:
  13. Production facilities: NEMA 250, Type 12.
  14. Damp or Wet Locations: NEMA250, Type4, stainless steel, or Type 4X, fiberglass-reinforced polyester.

3.3  INSTALLATION

  1. Install raceways, boxes, enclosures, and cabinets as indicated, according to manufacturer's written instructions and the following:
  2. Provide minimum 1/2-inch trade size
  3. Conceal raceway in finished walls, ceilings, and floors, unless otherwise indicated,
  4. Maintain at least 6 inches clearance from parallel flues, steam or hot-water pipes.
  5. Install level and square and at proper elevations.
  6. Provide adequate headroom.
  7. Complete installation before starting conductor installation.
  8. Use temporary closures to prevent foreign matter from entering.
  9. Protect stub-ups through floor slabs from damage.
  10. Make bends and offsets so as not to reduce the ID.
  11. Keep bends in the same plane and straight legs of offsets parallel.
  12. Provide fittings compatible with raceways and suitable for use and location.
  13. Provide threaded rigid steel conduit fittings for intermediate steel conduit.
  14. Route with a minimum of bends, in the shortest practical distance, considering the type of building construction and obstructions.
  15. Tighten setscrew fittings with suitable tools.
  16. Install exposed raceways parallel to or at right angles to nearby surfaces or structural members, and follow the surface contours as much as practical.
  17. Run parallel or banked raceways together, on common supports where practical.
  18. Make bends in parallel or banked runs from same centerline to make bends parallel. Use factory elbows only where elbows can be installed parallel; otherwise, provide field bends for parallel raceways.
  19. Join raceways with fittings designed and approved for the purpose and make joints tight.
  20. Make raceway terminations tight.
  21. Provide bonding bushings or wedges at connections subject to vibration.
  22. Provide bonding jumpers where joints cannot be made tight.
  23. Provide insulating bushings to protect conductors.
  24. Terminations:
  25. Align raceways to enter boxes squarely and install locknuts.
  26. Provide one locknut inside and one outside a box where one locknut is not secure.
  27. Screw raceways or fittings tightly into the hub so the end bears against the wire protection shoulder at threaded hubs,
  28. Align raceways so the coupling is square to the box.
  29. Tighten so that no threads remain exposed where chase nipples are used.
  30. Install pull wires in empty raceways.
  31. Provide #14 AWG zinc-coated steel or monofilament plastic line with not less than 200-lb tensile strength.
  32. Provide at least 12 inches of slack at each end of the pull wire.
  33. Telephone and Signal System Raceways, 2-Inch Trade Size and Smaller:
  34. Install raceways in continuous lengths not to exceed 250 feet
  35. Install raceways with a maximum of four 90-degree bends or equivalent.
  36. Provide pull or junction boxes where necessary to comply with these requirements.
  37. Provide an insulating bushing for each conduit not terminated in a box or fitting.
  38. Flexible Connections:
  39. Use maximum of 6 feet of conduit for recessed and semi-recessed lighting fixtures, equipment subject to vibration, noise transmission, or movement; and motors.
  40. Provide liquid tight flexible conduit in wet or damp locations.
  41. Provide separate equipment grounding conductor.
  42. Install hinged-cover enclosures and cabinets plumb. Support at each corner.

3.4  PROTECTION

  1. Provide final protection and maintain conditions, in a manner acceptable to manufacturer and Installer that ensures coatings, finishes, and cabinets are without damage or deterioration at time of Substantial Completion.
  2. Repair damage to galvanized finishes with zinc-rich paint recommended by manufacturer.

3.5  CLEANING

  1. After completion of installation, including outlets, fittings and devices:
  2. Inspect exposed finishes.
  3. Remove burrs, dirt, and construction debris.
  4. Repair finishes that have damage such as chips, scratches, and abrasions.

END OF SECTION

Page 6 of 6

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

File name: 260533 RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS