Attachment_15_-_LRAFB_Section_26_05_04_Raceways.pdf

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SECTION 26 05 04 - RACEWAYS

PART 1 - GENERAL

1.01 CONDUIT

A. Minimum size conduit shall be 1/2-inch. No more than 4 No. 12 conductors shall be pulled in 1/2-inch conduit. For conductors larger than No. 12, 3/4-inch conduit shall be the minimum size. Other sizes shall be as indicated on the plans, or required by the N.E.C. for number and size of conductors installed.

B. All conduit shall be of standard sizes and each length shall bear Underwriter's Laboratories Label and manufacturer's trade mark.

C. Submit catalog data in accordance with Section 01 33 00.

1.02 REFERENCES:

A. NEMA Standards Publication TC-2 Electrical Plastic Tubing (EPT) and Conduit (EPC 40 and EPC 80)

B. NEMA Standards Publication TC-5 Corrugated Polyolefin Coilable Plastic Utilities Duct

C. NEMA TC 6&8- PVC Plastic Utilities Duct for Underground Installation.

D. NEMA Standards Publication TC-7 Smooth-wall Coilable Polyethylene Electrical Plastic Duct

PART 2 - PRODUCTS

2.01 RIGID GALVANIZED STEEL (RGS)

Rigid steel conduit shall be National Electric Products Company, or approved equal;

galvanized mild steel, specially selected with reference to uniformity of thickness and freedom from defects.

2.02 ELECTRICAL METALLIC TUBING (EMT)

Electrical metallic tubing raceways, where permitted, shall be as manufactured by Jones & Laughlin Conduit Products or approved equal. Couplings and connections shall be compression type for 1/2" through 4" conduit and set-screw type for 4-1/2" and larger conduit. Couplings and connectors shall be made up tight and snug. INDENTER TYPE

FITTINGS SHALL NOT BE USED.

2.03 FLEXIBLE CONDUIT

Flexible steel conduit shall be used to connect all motors and other moving electrical equipment. Liquid-tight flexible steel conduit, type U.A. as manufactured by Anaconda or approved equal, shall be used in damp locations where flexible conduit is required.

2.04 RIGID NONMETALLIC CONDUIT (RNC)

Rigid Nonmetallic Conduit (RNC) and Fittings: RNC shall be UL Listed schedule 40 PVC unless shown otherwise on the drawings. Provide a complete raceway system with watertight connections. Conduit and fittings shall be sunlight resistant and rated for 900 C conductors.

2.05 INNERDUCT

A. NEMA TC 5, UL Listed, corrugated, specifically designed for optical fiber cable pathways.

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B. Acceptable Manufactures: Arnco, Carlon, Dura-line, and Pyramid.

C. Composition:

1. Non-plenum rated: Polyethylene (PE), or High Density Polyethylene (HDPE).

2. Plenum rated: per manufacturer.

D. Nominal Size: 1” (inside diameter), minimum.

E. Pulling strength shall be a minimum of 600 pounds.

F. Color: Orange, solid.

G. Fittings and Innerduct Bodies: Manufacturer’s recommended fittings including couplings, adapters, end caps, end bells, expansion couplings, plugs, sleeves, a full compliment of connective devices, and all other components to make the system work.

H. Innerduct Labeling:

1. All innerduct installed under this project shall be labeled where exposed. This includes areas where the innerduct is (1) installed alone in risers, tunnels or trays, (2) where they transit manholes and/or pull boxes and (3) in equipment rooms.

2. The innerduct for fiber optic cable shall be labeled with a durable Yellow Polyethylene tag which reads “CAUTION FIBER OPTIC CABLE” and includes blank spaces for adding fiber count and destination information. The destination of the cable(s) contained in the innerduct and the fiber count shall be marked on the tag. Hand lettering is acceptable on this tag, using an indelible type ink.

3. The tag shall be secured to the innerduct(s) using self-locking ties.

4. Innerduct shall be labeled on each floor in a riser installation, in each manhole and/or handhole or at 25-foot intervals in a tunnel or tray installation.

2.06 MULTI-CELL RACEWAY SYSTEM

A. Each raceway section will be manufactured in standard twenty-foot lengths. Raceway design must incorporate a watertight seal and locking ring that enables fast, cement free assembly. Each section of raceway will be belled on one end with two grooves machined into the inside diameter (ID) of the bell and with a groove and chamfer machined into the outside diameter (OD) of the spigot end. Raceway must contain a lubricated triple-lobed gasket factory installed in the bell end of the pipe to seal up to 75 psi with a 65’ bend radius.

Each raceway section will be available in 3 and 4 way multi-cell configuration.

B. Acceptable Manufacturers: Carlon, Lamson & Sessios or approved equal.

C. Raceway characteristics:

1. Raceway outer duct will be gray in color and sunlight resistant.

2. PVC innerducts shall be made from PVC compound which meets cell classification PVC 12254 A, B, or C as defined in ASTM D1784.

3. Dimensions for innerduct shall be maximum 1.19” I.D. and maximum 1.315” O.D. for 4-cell and maximum 1.51” I.D. and maximum 1.66” O.D. for 3-cell.

D. Fittings: Schedule 40 fittings shall be used with the multi-cell raceway system. Schedule 40 fittings shall be easily attached using standard PVC cement. Manufacturer shall make available all necessary fittings and accessories.

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PART 3 - EXECUTION

3.01 INSTALLATION

A. Conduit run in finished areas of building shall be concealed in floor, wall, ceiling, above or behind furring, or as noted on the drawings. Contractor shall avail himself of architectural and structural drawings for information relating to slab thickness, reinforcing, finished lines, chases, furrings, ceiling construction and finishes, and shall be guided accordingly in installation of his work. In unfinished areas, conduit is to be run concealed where construction permits; otherwise, it may be run exposed. Exercise particular care in routing and grouping exposed conduit to present neat and workmanlike appearance with all lines running parallel with or perpendicular to building lines, giving due attention to ducts, pipe and other interferences. Exercise extreme care in laying out electrical work to insure that ceiling outlets are located symmetrically within areas and with respect to air conditioning, heating and ventilating outlets, tile patterns, finishes, etc. Any errors will be corrected at no additional cost to the government.

B. Where conduits cross building expansion joints, the contractor shall furnish and install an offset expansion joint or a sliding expansion joint. Sliding expansion joints shall be with bonding strap and clamp. Where conduits are exposed, provide expansion joints as indicated on the drawings or specified in subsequent sections.

C. Flexible conduit shall be used for connection on all motor terminal boxes to conduit stubs or outlets. Where motors are mounted on sliding bases, the flexible connection shall be of sufficient (minimum 12 in.) length to allow full travel of motor on base.

D. Flexible conduit shall be used for connection of control equipment requiring piping, such as solenoid valves, pressure control, aquastats, pneumatic-electric relays, etc. Certain lighting fixtures will require flexible conduit connections to junction boxes, as shown on the drawings or specified hereinafter.

E. Where conduits are run individually, they shall be supported by using 1/4-inch galvanized rods or No. 8 galvanized wire with clips equal to Caddy "Kon Clips". The hangers shall be secured by means of toggle bolts on hollow masonry; expansion shields and machine screws or standard preset inserts on concrete or solid masonry; machine screws or bolts on metal surfaces; and wood screws on wood construction. The use of perforated strap or steel tie-wire will not be permitted.

F. Where multiple conduits are run horizontally at the same elevation and grade, they may be supported on trapezes or channels suspended on rods. Trapeze members, including suspension rods, shall be properly sized for number, size and loaded weight of conduits to be supported.

G. Lay out and install conduit runs to avoid proximity to hot water piping. In no case run conduit within 3 inches of such piping.

H. Conduits entering panelboards, pull boxes, support boxes or outlet boxes shall be secured in place by galvanized steel lock-nuts and bushing.

I. Conduit joints shall be made tight with approved couplings; turns and offsets made with long sweep ells or bends. Ends of conduit are to be cut square, reamed and brought butt-to-butt in couplings.

J. Bends in conduit shall be made with an approved bending device and conduit bends or off-sets in which conduit in crushed, deformed or otherwise injured is not to be installed. Field

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bends and offsets shall be uniform and symmetrical. Install factory elbows on two-inch and above conduit.

K. Conduit not embedded in concrete, all vertical risers, etc. shall be firmly secured by means of approved pipe clamps, hangers, etc. Run conduit without sags and pockets and in general drain or pitch toward boxes. Where conduit crosses building expansion joints, provide expansion fittings and approved ground jumper.

L. Where conduits are supported under exposed steel beams or bar joints, approved type beam clamps and/or clamp/hangers shall be used.

M. Conduits shall be continuous from main distribution panel through distribution panels, power panels, lighting panels, etc., to outlets. Conduit system shall be bonded throughout.

N. All hangers shall be so located as to properly grade and support horizontal conduits without appreciable sagging of these lines. All conduit shall be of standard size and each length shall bear Underwriters' Laboratories Label and manufacturer's trade mark.

O. Where lines of different contractors are racked on same supporting structures, each contractor shall cooperate with the others involved to properly locate supporting members, and shall furnish a proportionate share of labor and materials involved in same installation;

also shall cooperate with the other contractors so that the same type hanger is used throughout.

P. Conduit shall be kept corked and dry during construction and shall be swabbed out before wires are pulled into conduit.

Q. Galvanized rigid conduit shall be used for all feeders. Galvanized rigid conduit shall also be used in damp locations, buried in earth and in concrete. In damp locations, joint compound shall be applied to the threads to make water-tight. Electric metallic tubing may be used for branch circuits where galvanized rigid conduit is not required and approved by contracting officer

3.02 INNERDUCT UNDERGROUND INSTALLATION

A. Innerducts shall be installed in schedule 40 PVC conduit in locations as shown on the drawings. All underground PVC runs shall use wide sweeping turns with a minimum radius of 40 feet.

B. Innerduct is to be racked as high as possible in each manhole or hand hole. Conduit or duct runs beneath the surface shall be watertight and continuous.

C. A waterproof corrosion resistant pull rope for use on future cable installations shall be installed in each innerduct where one or more innerducts is installed.

D. In manholes where the innerduct is broken (not pulled through), the Contractor shall install a suitable cable guard. This cable guard shall consist of an oversized piece of innerduct, a piece of split innerduct or such protection that is acceptable to the Government

E. The Contractor shall coordinate, assist and accompany the CO during inspections of underground facilities. No conduit runs shall be covered prior to inspection and acceptance of the installation by the Communications Squadron and the CO.

F. Innerduct installed in plenum space shall be plenum rated.

G. Installation of multi-cell raceway systems shall be done in accordance with the manufacturer’s instructions.