ARCAT, Inc.

 SECTION 26 05 36CABLE TRAYSDisplay hidden notes to specifier. (Don't know how? Click Here) Copyright 2016 - 2016 ARCAT, Inc. - All rights reserved** NOTE TO SPECIFIER ** MP Husky USA; cable tray and cable bus products..This section is based on the products of MP Husky USA, which is located at:204 Old Piedmont Hwy.Greenville, SC 29605Tel: 864-234-4800Fax: 864-234-4822Email: request info (mphusky@)Web: [ Click Here ] for additional information.MP Husky designs and manufactures UL CSA NEMA Cable Tray Systems , UL CSA NEMA Wire Mesh/Basket Cable Tray Systems, and UL CSA NEMA Cable Bus Power Distribution Systems. Founded in 1955, MP Husky originally began operations as Husky Products. Over the following 50+ years of leadership and service, MP Husky has gone through several transformations and mergers, including Husky/Burndy and Metal Products, leading to what is today MP Husky - Americas leading manufacturer of UL CSA NEMA Cable Tray , Wire Mesh/Basket Cable Trays , UL CSA NEMA Cable Bus , and nuclear cable tray systems .Throughout these changes one thing has remained constant - the Husky drive to be the most reliable, highest quality, cost effective and innovative cable tray manufacturer and cable bus manufacturer of NEMA compliant Cable Support Systems and Cable Bus Power Distribution Systems. We have an unsurpassed commitment to customer satisfaction and service and we are eager to earn your loyalty and trust. As we continue to build and strengthen our partnerships with our customers, we look forward to the next 50 years of service and support.MP Husky has over 30 Representative locations throughout the United States, Canada, Europe, Middle East, Asia, Puerto Rico, Chile, Korea and throughout the world. Our home office and plant locations are in Greenville, South Carolina, and in Saudi Arabia . Sales offices are located in Houston, TX and Los Angeles, CA

GENERAL

SECTION INCLUDES

** NOTE TO SPECIFIER ** Delete items below not required for project.

Metal Ladder Type Cable Trays.

Metal Trough Type Cable Trays.

Fiberglass Type Cable Trays

Center Rail Type Cable Trays.

Way Tray

Cable bus and fittings.

RELATED SECTIONS

** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.

Section 26 05 48 - Vibration and Seismic Controls for Electrical Systems.

Section 07 80 00 - Fire and Smoke Protection.

Section 27 05 29 - Hangers and Supports for Communications Systems.

Section 26 05 53 - Identification for Electrical Systems.

Section 26 05 19 - Low-Voltage Electrical Power Conductors and Cables.

Section 27 05 39 - Surface Raceways for Communications Systems.

Section 26 27 26 - Wiring Devices.

Section 26 05 00 - Common Work Results for Electrical.

Section 48 00 00 - Electrical Power Generation.

Section - .

Section 27 11 23 - Communications Cable Management and Ladder Rack.

REFERENCES

** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.

ANSI/NFPA 70 - National Electrical Code (NEC).

ASTM A 123/A123M - Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products.

ASTM A 653/A653M - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process.

ASTM D 635 - Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position

ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials

IEC 61537 - Cable Tray Systems and Cable Ladder Systems for Cable Management.

NEMA FG 1 - Nonmetallic Cable Tray Systems.

NEMA VE 1/CSA C22.2 No. 126.1-02 - Metal Cable Tray Systems.

NEMA VE 2 - Metal Cable Tray Installation Guidelines.

NEMA BU 1.1 - General Instructions for Handling, Installation, Operation, and Maintenance of Busway Rated 600 Volts or Less

NEMA VE 1/CSA C22.2 No. 126.1 - Metal Cable Tray Systems, for materials, sizes, and configurations

NFPA 70 - National Electrical Code

ANSI/NETA ATS-2013 - Acceptance Testing Specifications for Electrical Power Distribution Equipment and Systems.

ICEA publication #P-46-426

ICEA publication #5-66-524 interim STD #1842

DESIGN / PERFORMANCE REQUIREMENTS

Source Limitations: Obtain cable tray components through one source from a single manufacturer.

Approval and Labeling: Provide cable trays and accessories specified in this Section that are approved and labeled.

The Terms "Classified" pertaining to cable trays (rather than "Listed") and "Labeled": As defined in NFPA 70, Article 100.

Listing and Labeling Agency Qualifications: A "Nationally Recognized Testing Laboratory" as defined in OSHA Regulation 1910.7.

Comply with NFPA 70, National Electrical Code, Article 392: Cable Trays; provide UL Classification and labels.

Comply with IEC 61537, Cable Tray Systems and Cable Ladder Systems for Cable Management.

Comply with NEMA VE 1/CSA C22.2 No. 126.1, Metal Cable Tray Systems, for materials, sizes, and configurations; provide cCSAus Certificate and labels.

Provide UL (or ETL) test documentation showing cable compression/deformation testing.

Structural Performance: Cable trays shall be tested and rated for load carrying capacity and safety factors.

Uniform Load Distribution: Capable of supporting a uniformly distributed load on the indicated support span when supported as a simple span and tested according to NEMA VE 1.

Concentrated Load: A load applied at midpoint of span and centerline of tray.

Load and Safety Factors: Applicable to both side rails and rung capacities.

SUBMITTALS

Submit under provisions of Section 01 30 00 - Administrative Requirements.

Product Data: Manufacturer's data sheets on each product to be used, including:

Preparation instructions and recommendations.

Storage and handling requirements and recommendations.

Installation methods.

Shop Drawings:

Indicate tray type, dimensions, support points, splices and finishes. Include load and deflection tables.

For cable bus Indicate ratings, dimensions and finishes. Include dimensioned layout diagram; installation details; locations of supports and fittings; and firestops and weatherseals at penetrations. Include details of wall and floor penetrations.

Include floor plans and sections drawn to scale showing cable tray layout and relationships between components and adjacent structural and mechanical elements. Field verification of all dimensions, routing, etc., is required.

Manufacturer's Certificates: Certify products meet or exceed specified requirements.

Closeout Submittals: Record actual routing of cable tray and locations of supports. Record actual locations of busway routing and location of plug-in units.

QUALITY ASSURANCE

Manufacturer Qualifications: Company specializing in manufacturing Products specified in this section with minimum five years documented experience and ISO 9001 quality certified.

Installer Qualifications: Company specializing in installing products specified in this section with minimum three years documented experience.

** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.

Mock-Up: Provide a mock-up for evaluation of installation techniques and application workmanship.

Finish areas designated by Architect.

Do not proceed with remaining work until workmanship is approved by Architect.

Refinish mock-up area as required to produce acceptable work.

Pre-installation Meeting:

Convene minimum one week prior to commencing work of this section.

Convene prior to performing field measurements for fabrication drawings.

Review proposed routing, sequence of installation, and protection requirements for installed cable trays and busway

DELIVERY, STORAGE, AND HANDLING

Store products in manufacturer's unopened packaging until ready for installation.

Handle in accordance with NEMA BU 1.1 and manufacturer's written instructions.

Protect from moisture by using appropriate coverings. Store in dry interior locations.

SEQUENCING

Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.

PROJECT CONDITIONS

Do not install indoor cable trays and busway until building is closed in and suitable temperature conditions are controlled.

Coordinate layout and installation of cable tray with other installations.

PRODUCTS

MANUFACTURERS

Acceptable Manufacturer: MP Husky USA, which is located at: 204 Old Piedmont Hwy.; Greenville, SC 29605; Tel: 864-234-4800; Fax: 864-234-4822; Email: request info (mphusky@); Web:

** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.

Substitutions: Not permitted.

Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.

CABLE TRAYS - GENERAL

Product Description: MP Husky tray as manufactured in accordance with and by a member of NEMA VE 1.

Cable tray systems shall be of the design of one manufacturer with no burrs, projections or sharp edges to damage cable insulation.

Fittings shall be as shown on the Drawings.

Tray sections shall be of the width indicated on the Drawings to provide the planned cable capacity.

Provide maximum lengths and widths available that will minimize joints in each area that correspond with the support system indicated.

** NOTE TO SPECIFIER ** Edit the following paragraphs as required and applicable to project requirements. Delete the paragraphs that are not applicable.

METAL LADDER TYPE CABLE TRAYS

Product Description: Husky Ladder type tray as manufactured in accordance with and by a member of NEMA VE 1.

Fittings shall have the same load carrying capacity as straight sections. Fittings shall be of the continuous arc type with a 12, 24, 36, or 48 inch radius. unless otherwise shown on the Drawings.

Ladder type tray straight sections shall be 10 feet, 17 feet 20 feet, 24 feet or 30 feet long and shall be of the width indicated on the Drawings to provide the planned cable capacity.

Material and Construction:

** NOTE TO SPECIFIER ** Select one of the following two paragraphs as required for the project. Delete the one not required.

Aluminum Ladder type cable tray longitudinal members shall be 4-1/2 inch, 6 inch, 7 inch 8 inch or 10 inch deep extruded aluminum channels or I-Beams of 6063-TB aluminum alloy and shall be of the depth indicated on the Drawings to provide the planned cable capacity.

Aluminum Ladder transverse members (rungs) shall be of extruded aluminum alloy 6063-T6 and designed to prevent collection pockets for moisture of contaminant materials.

** NOTE TO SPECIFIER ** Select the following paragraph if required for the project. Delete if not required.

Provide aluminum cable tray with PVC coated finish.

Steel Ladder type cable tray shall be 3-3/8 inch, 4 inch, 4-1/2 inch, 6 inch or 7 inch deep channels. Steel Ladder transverse members (rungs) shall be designed to prevent collection pockets for moisture or containment materials. Cable tray shall be of the depth indicated on the Drawings to provide the planned cable capacity and fabricated of:

** NOTE TO SPECIFIER ** Select the one of the following paragraphs as required for the project. Delete those not required.

Mill galvanized steel per ASTM A 653, G90;

Steel hot dip galvanized after fabrication per ASTM A 123;

Type 304 stainless steel

Type 316 stainless steel

Powder coated steel

Husky Ladder (I-Beam): Transverse members (rungs) shall be inserted into a slot punched in the longitudinal members conforming to the contour of the transverse member and heliarc welded on the outside of the longitudinal member. Transverse members shall be located on 9 inch, 12 inch and 18 inch spacing.

Husky Ladder (Flange-Out): Transverse members (rungs) shall be inserted into a slot punched in the longitudinal members conforming to the contour of the transverse member and heliarc welded on the outside of the longitudinal member. Transverse members shall be located on 9 inch, 12 inch and 18 inch spacing. Flanges on straights and fittings shall point outward.

Husky Ladder (Flange-in)-Transverse members (rungs) shall be joined to the longitudinal members by means of a minimum of two resistance welds or two high strength clinches or heliarc welded at each end of the transverse member. Transverse members shall be located on 6 inch, 9 inch and 12 inch spacing. Flanges on straights and fittings shall point inward.

Splice Joints:

Resistance across any splice connection shall not exceed 330 microhms.

Splice connector design shall be universal for use on straight sections and fitting.

Splice connectors shall be of the high pressure bolted type with a minimum of four bolts per connector.

Loading:

Husky Ladder type cable tray shall have a load safety factor of 1 5 based on the destruction load capacity as defined within NEMA Standard VE 1.

Husky Ladder type cable tray shall meet or exceed the following NEMA load classification.

8A (50 Ibs, per ft / 8 ft Span)

8B (75 lbs. per ft / 8 ft Span)

8C (100 lbs per ft / 8 ft. Span)

12A (50 lbs. per ft /12 ft Span)

128 (75 lbs, per ft /12 ft Span)

128+ (80 lbs, per ft /12 ft Span)

12C (100 lbs. per ft /12 ft Span)

12C+ (120 lbs. per ft /12 ft Span)

16A (50 Ibs per ft /16 ft Span)

16B (75 lbs per ft /16 ft Span)

16C (100 lbs, per ft /16 ft Span)

20A (50 lbs per ft /20 ft Span)

20A+ (69 lbs per ft /20 ft Span)

20B (75 lbs. per ft /20 ft Span)

20B+ (95 lbs. per ft /20 ft Span)

20C (100 Ibs per ft /20 ft Span)

20C+ (110 Ibs per ft /20 ft Span)

24B+ (89 lbs. per ft /24 ft Span)

30B (89 lbs. per ft /30 ft Span)

40A (72 lbs. per ft /40 ft Span)

UL: Cable tray system shall be UL classified for use as an equipment ground and shall have the minimum cross sectional area shown on the tray labels.

METAL TROUGH TYPE CABLE TRAYS

Product Description: Husky Trough type tray as manufactured in accordance with and by a member of NEMA VE 1.

Fittings shall have the same load carrying capacity as straight sections. Fittings shall be of the continuous arc type with a 12, 24, 36, or 48 inch radius. unless otherwise shown on the Drawings.

Trough type tray straight sections shall be 10 feet, 12 feet, 20 feet, 24 feet or 30 feet long and shall be of the width indicated on the Drawings to provide the planned cable capacity.

Material and Construction

** NOTE TO SPECIFIER ** Select one of the following two paragraphs as required for the project. Delete the one not required. Note: For ventilated trays over 24 wide, use ladder type construction (Ventray) with 4 inch spacing.

Steel Trough type cable tray longitudinal members shall be 3-3/8 inch, 4 inch, 4-1/2 inch, 6 inch or 7 inch. Cable tray shall be of the depth indicated on the Drawings to provide the planned cable capacity and fabricated of:

** NOTE TO SPECIFIER ** Select the one of the following paragraphs as required for the project. Delete those not required.

Mill galvanized steel per ASTM A 653, G90;

Steel hot dip galvanized after fabrication per ASTM A 123;

Type 304 stainless steel

Type 316 stainless steel

Powder coated steel

Aluminum Trough type cable tray longitudinal members shall be 4-1/2 inch, 6 inch, 7 inch 8 inch or 10 inch deep extruded aluminum channels or I-Beams of 6063-T6 aluminum alloy.

Aluminum Trough bottom shall be of corrugated sheet type construction. Corrugation shall be approximately 3/8 inch deep on 1-1/2 inch pitch to provide a minimum cable support surface of 5-1/2 inches per linear foot of tray length.

Corrugated bottom shall be attached to the bottom flange of the channel or I-Beam shaped longitudinal member by means of resistance welding or high strength clinches at a minimum of 3 inch intervals.

** NOTE TO SPECIFIER ** Select the following paragraph if required for the project. Delete if not required.

Provide aluminum cable tray with PVC coated finish.

** NOTE TO SPECIFIER ** Select one of the following two paragraphs as required for the project. Delete the one not required.

Husky Trough with Solid Bottom: Constructed of continuous solid corrugation with flanges on straights and fittings pointing inward.

Husky Trough with Ventilated Bottom: Constructed of continuous ventilated corrugation with flanges on straights and fittings pointing inward. Corrugations have 40 percent open area.

Slice Joints

Resistance across any splice connection shall not exceed 330 microhms.

Splice connector design shall be universal for use on straight sections and fittings.

Splice connectors shall be of the high pressure bolted type with a minimum of four bolts per connector

Loading

Husky Trough type cable tray shalt have a load safety factor of 1.5 based on the destruction load capacity as defined within NEMA Standard VE 1.

Husky Trough type cable tray shall meet or exceed the following NEMA load classification:

8A (50 Ibs, per ft / 8 ft Span)

8B (75 lbs. per ft / 8 ft Span)

8C (100 lbs per ft / 8 ft. Span)

12A (50 lbs. per ft /12 ft Span)

128 (75 lbs, per ft /12 ft Span)

12C (100 lbs. per ft /12 ft Span)

16A (50 Ibs per ft /16 ft Span)

16B (75 lbs per ft /16 ft Span)

16C (100 lbs, per ft /16 ft Span)

20A (50 lbs per ft /20 ft Span)

20B (75 lbs. per ft /20 ft Span)

20C (100 Ibs per ft /20 ft Span)

UL: Cable tray system shall be UL classified for use as an equipment ground and shall have the minimum cross sectional area shown on the tray labels.

FIBERGLASS TYPE CABLE TRAYS

Product Description: All manufacturing practices will be in accordance with NEMA FG-1.

Cable Tray System shall be made of straight sections, fitting and accessories as defined in the latest NEMA FG-1

Loading classifications and test specimens shall be per NEMA FG-1

Materials and Construction:

Straight section structural elements: side rails, rungs and splice plates shall be pultruded from glass fiber reinforced polyester or vinylester resin.

Pultruded shapes shall be constructed with a surface veil to insure a resin-rich surface and ultraviolet light resistance

Pultruded shapes shall meet ASTM E 84 Class 1 flame rating and self-extinguishing requirements of ASTM D 635.

Straight section lengths will be 120 inches (305 cm) or 240 inches (610 cm) standard.

Side rails will be inward "C' configuration and be pre-drilled to accept splice plates.

Loading depths for cable tray systems shall be 5 inches, 3 inches or 2 inches per NEMA FG-1 tolerances.

Overall heights shall be 6 inches, 4 inches and 3 inches respectively

Fittings:

Molded fittings shall be formed with a minimum 3 inch tangent following the radius.

3 inch or 5 inch loading depth systems shall have 90 degree and 45 degree molded fittings in 12 inch or 24 inch radius.

Width: usable inside tray width shall be 6 inches, 9 inches, 12 inches, 18 inches, 24 inches, 30 inches and 36 inches. Outside widths shall not exceed inside by more than 2 inches.

Straight and expansion splice plates will be of stainless steel or fiberglass design with an eight bolt pattern in 5 inch fill systems and four bolt pattern in 3 inch and 2 inch fill systems.

Dimension tolerances will be per NEMA FG-1

Cable tray must have integral connection between side rails and rungs consisting of non-metallic mechanical fasteners and adhesive bonding,

CENTER RAIL TYPE CABLE TRAY

Product Description: Tray shall be manufactured by a member of NOVA and tray manufactured in accordance with the latest NEMA or CSA requirements.

Material:

Tray manufactured from 6063-T6 high strength aluminum. Spine is a minimum of 3 inches high and 1-1/2 inches wide, Top and bottom portions of spine have a 0145 inch minimum thickness and vertical web portions of spine have a minimum thickness of 0.098 inch. Rung is a minimum of 0.50 inch wide by 0.50 inch high. Rung is a minimum of 0.060 inch thick. Ends of rungs are rounded to prevent damage to cables and injury to personnel

Top/Bottom Mount Tray Construction:

Spine is punched to minimize distortion from punching of rung holes for insertion of rungs. Rungs are inserted through the holes in the spine and fastened by high pressure staking in four locations to assure that rungs are secure and to prevent loose rungs. Splice connector are also usable as a hanger with a 1/2 inch diameter hanger rod. Splice connector uses two bolts per connection that pass through the spine in the horizontal direction.

Wall Mount Tray Construction:

Wall mount trays are constructed in the same manner as top/bottom mount trays, except rungs protrude 1/2 inch from the spine on the back side. Wall mount tray shall be mounted to wall in three locations per 10 foot or 12 foot straight section. Tray is mounted using 3/4 inch spacers supplied with the section for rung clearance and to compensate for irregularities in walls.

Loading:

Top mount trays meet NEMA 12C (100 lbs/ft.-12 foot span) loading requirements. Top mount trays meet CSA Class D (179 kg/m-3 m span) loading requirements. Bottom mount trays meet NEMA 12B (75 lbs/ft -12 foot. span) loading requirements. Bottom mount trays shall meet GSA Class C (97kg/m - 3 m span) loading requirements.

Widths:

Widths are measured to the inside of rungs, except for bottom rung mount 6 inch, 9 inch and 12 inch wide trays. These widths include an additional 1-1/2 inch for the spine width. (Example: a 6 inch wide bottom mount width is 7-1/2 inches).

WAY TRAY

General:

Cable tray systems shall be of the design of one manufacturer and shall be designed so that there are no burrs, projections, or sharp edges to damage cable insulation_

Fittings shall have the same load carrying capacity as straight sections_ Fittings shall be of the continuous arc type with a 12, 24 or 36 inch radius unless otherwise shown on the Drawings.

Trough type tray straight sections shall be 10 feet or 12 feet long and shall be of the width indicated on the Drawings to provide the planned cable capacity.

Materials and Construction:

Trough type cable tray sides shall be 3-3/8, 4, or 6 deep,

Tray shall be Aluminum, Galvannealed, Steel Mill-Galvanized per ASTM A 653.1, or 304 or 316 stainless steel as indicated on the Drawings.

Trough bottom shall be of solid flat sheet type construction. Flanges on straights and fittings shall point inward

Splice Joints:

Resistance across any splice connection shall not exceed 330 microhms,

Splice connector design shall be universal for use on straight sections and fittings,

Splice connectors shall be of the high pressure bolted type with a minimum of four bolts per connector.

Tray shall be manufactured by a member of NEMA in accordance with NEMA VE-1 and shall be installed in accordance with NEMA VE-2

CABLE BUS

General:

Provide a complete metal enclosed bus system including all necessary fittings, tap boxes, enclosure, connectors, entrance fittings, insulated conductors, electrical connectors, terminating kits and other accessories as required.

Bus system shall be suitable for indoor or outdoor use with conductor spacing and ventilation maintained throughout the system.

Design all elements of the bus enclosure to eliminate any sharp edges or projections that may injure personnel or conductor insulations.

Bus system shall be CABL-BUS, as manufactured by MP Husky.

Construction:

Fabricate all load carrying members of the bus system from extrusions of aluminum alloy 6063-T6. Maximum allowable stress used in designed shall be 10,000 PSI.

Bus enclosure fittings shall normally have a radius of 24 inches, other bending radii shall be provided as required.

Top and bottom enclosure sections shall be corrugated to provide mechanical strength and slotted for ventilation. Fasten top cover to the enclosure with self tapping screws spaced approximately 2 feet on centers and shall be removable for inspection. Bottom section is factory installed by welding.

Splice joints between sections of the bus enclosure shall be the high pressure splined bolted type design which avoids any structural weakness at the connection and does not exceed the electrical resistance specified in this specification.

Design conductor support blocks in segments to maintain a minimum of one conductor diameter in both the horizontal and vertical planes, as required for free air conductor rating. Horizontal runs will have blocks spaced every 36 inches and vertical runs every 18 inches.

Electrical:

Current carrying conductors shall have insulation rated for 90 degrees C operating temperature in accordance with ICEA publication #P-46-426 and interim STD #1 and #2 to ICEA publication #S-66-524 for the ampacity and voltage specified.

Phased and support conductors to maintain low impedance and assure the mechanical strength necessary to prevent cable movement or damage under short circuit currents up to 100,000 RMS symmetrical amps.

Conductors shall be of continuous length and pulled in after the bus enclosure is in place. Use electrical connectors only at termination of conductor runs or. if necessary, tap points. Electrical connectors shall be as manufactured by MP Husky

Bus enclosure shall have a continuous current rating of not less than 1,000 amperes (50PC Rise) and the resistance across the enclosure section splice shall not exceed 50 microhrns.

Ground bus enclosure at sufficient intervals for the purpose of preventing a potential above ground on the bus enclosure in the event of a fault

Arrange conductors in a phasing pattern that exhibits minimal inter-phase and intra-phase imbalance.

All transposing of cables must occur at termination points. Transposing of cables will not be done in the bus housing

EXECUTION

EXAMINATION

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.

If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.

PREPARATION

Clean surfaces thoroughly prior to installation.

Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

INSTALLATION

Install in accordance with manufacturer's instructions.

Install metal cable tray in accordance with NEMA VE 2.

Install fiberglass cable tray in accordance with NEMA FG 1.

Install as a complete system, including all necessary fasteners, hold-down clips, splice-plate support systems, barrier strips, hinged horizontal and vertical splice plates, elbows, reducers, tees, and crosses.

Remove burrs and sharp edges from cable trays. All wire mesh tray must be manufactured with top wire safety edge design.

Fasten cable tray supports to building structure and install seismic restraints.

Design each fastener and support to carry load indicated by seismic requirements.

** NOTE TO SPECIFIER ** Delete the following paragraph if seismic controls are not required.

Design each fastener and support to comply with seismic-restraint details according to Section 27 05 29 - Hangers and Supports for Communications Systems Vibration and Seismic Controls for Electrical Systems.

Place supports so that spans do not exceed maximum spans on schedules.

Construct supports from channel members, threaded rods, and other appurtenances furnished by cable tray manufacturer. Arrange supports in trapeze or wall-bracket form as required by application.

Support bus assembly to prevent twisting from eccentric loading.

Locate and install supports according to NEMA VE 2 or NEMA FG 1 as applicable.

** NOTE TO SPECIFIER ** Retain paragraph below if cable tray connects to equipment. Delete if not required.

Make connections to equipment with flanged fittings fastened to cable tray and to equipment. Support cable tray independent of fittings. Do not carry weight of cable tray on equipment enclosure.

** NOTE TO SPECIFIER ** Retain first paragraph below if expansion fittings are required. Delete if not required.

Install expansion connectors where cable tray crosses building expansion joint and in cable tray runs that exceed dimensions recommended in NEMA VE 2 or NEMA FG 1 as applicable. Space connectors and set gaps according to NEMA VE 2 or NEMA FG 1 as applicable.

Make changes in direction, connections and elevation using manufacturer recommended fittings.

** NOTE TO SPECIFIER ** If cable trays are sized for future cables, specify provisions for penetrations with sleeves through fire-rated partitions or use "repairable" firestop-sealing material.

Seal penetrations through fire and smoke barriers according to Section 07 80 00 - Fire and Smoke Protection. Install ASTM E 90 certified cable tray for critical circuits, hallways or in areas of egress as shown on Drawings.

Workspace: Install cable trays with enough space to permit access for installing cables.

** NOTE TO SPECIFIER ** Retain the following paragraph for metal tray systems only. Delete if not required.

Ground and bond metal cable tray in accordance with Section 26 05 48 - Vibration and Seismic Controls for Electrical Systems.

Provide continuity between tray components.

Use anti-oxidant compound to prepare aluminum contact surfaces before assembly.

Install equipment grounding conductor through entire length of tray; bond to each component.

Make connections to tray using mechanical, compression or exothermic connectors.

Install warning signs at 50 feet (1500 mm) centers along cable tray, located to be visible.

CABLE BUS INSTALLATION

Install in accordance with manufacturer's instructions.

Install in accordance with NEMA BU1.1.

Install busway length with expansion fitting at each location where busway run crosses building expansion joint.

Mount horizontal busway runs as indicated on Drawings.

Support busway at maximum intervals as recommended by manufacturer. Support vertical riser at each floor.

Install busway with integral fire stops located where busway penetrates fire-rated walls and floors. Seal around opening to maintain fire-rating equal to wall or floor rating.

Install concrete curb around interior floor penetrations.

Install busway with integral weatherseal located where busway penetrates exterior wall, or roof. Provide wall and roof flange and seal around opening to maintain weathertight installation.

Install fuses in fused switches.

Ground and bond busway in accordance with Section 26 05 48 - Vibration and Seismic Controls for Electrical Systems.

CABLE INSTALLATION

Install cables only when cable tray installation has been completed and inspected.

Tighten cable clamps only enough to secure the cable, without indenting the cable jacket. Install cable ties with a tool that includes an automatic pressure-limiting device.

On vertical runs, fasten cables to tray every 18 inches (457 mm).

In existing construction, remove inactive or dead cables from cable tray.

Install covers, if required, after installation of cable is completed.

FIELD QUALITY CONTROL

After installing cable trays and after electrical circuitry has been energized, survey for compliance with requirements. Perform the following field quality-control survey:

Visually inspect cable insulation for damage. Correct sharp corners, protuberances in cable tray, vibration, and thermal expansion and contraction conditions, which may cause or have caused damage.

Verify that the number, size, and voltage of cables in cable tray do not exceed that permitted by NFPA 70. Verify that communication or data-processing circuits are separated from power circuits by barriers.

Verify that there is no intrusion of such items as pipe, hangers, or other equipment that could damage cables.

Remove deposits of dust, industrial process materials, trash of any description, and any blockage of tray ventilation.

Visually inspect each cable tray joint and each ground connection for mechanical continuity. Check bolted connections between sections for corrosion. Clean and re-torque in suspect areas.

Check for missing or damaged bolts, bolt heads, or nuts. When found, replace with specified hardware.

Perform visual and mechanical checks for adequacy of cable tray grounding; verify that all takeoff raceways are bonded to cable tray. Test cable tray in accordance with NFPA 70B Chapter 18 and verify cable tray is bonded with a total resistance less than 5 ohms.

Inspect and test busway in accordance with ANSI/NETA ATS-2013

Report results in writing to engineer of record.

PROTECTION

Protect installed products until completion of project.

Repair damage to galvanized finishes with zinc-rich paint recommended by cable tray manufacturer.

Repair damage to paint finishes with matching touchup coating recommended by cable tray manufacturer.

Install temporary protection for cables in open trays to protect exposed cables from falling objects or debris during construction. Temporary protection for cables and cable tray can be constructed of wood or metal materials until the risk of damage is over.

Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION ................
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