1995 Metric CSJ , etc. SPECIAL SPECIFICATION ITEM Communication Hub Cabinet

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1 1995 Metric CSJ , etc. SPECIAL SPECIFICATION ITEM 6423 Communication Hub Cabinet 1.0 Description This Item shall govern for the furnishing and installation of the Communication Hub as shown on the plans, as detailed in these Special Specifications, and as directed by the Engineer. 2.0 Materials 2.1 General Requirements All materials furnished, assembled, fabricated or installed under this Item shall be in full compliance with Bellcore Technical requirements. Each Communication Hub shall be provided complete with all internal components, terminal strips, harnesses, connectors, as well as all mounting hardware necessary to provide for installation of equipment as described herein. All Communication Hubs shall be as depicted in the drawings, identical in size, shape and quality throughout the entire project. Details of design of the cabinet shall be submitted to the Engineer for review and approval prior to fabrication. The communication hub cabinet shall be designed for and compatible with all equipment located within the plans and specifications. Any cost associated with providing compatibility with the equipment shall be subsidiary to the various bid items and no direct payment shall be made. Telephone voice communication type line circuit with telephone jack and telephone shall be provided for voice communication. One jack/telephone with headset shall be installed in the cabinet. The telephone circuit shall be interfaced to the DS-1 Muldem, specified elsewhere, for transport over the ATM network for connection to the City's voice communication system or PBX. Each telephone with headset shall be provided with a 15 meter cord. 3.0 Communication Hub Cabinet 3.1 Performance The enclosure shall meet or exceed the requirements of a NEMA 4X rating, Bellcore TA-NWT (Issue 2)

2 3.2 Construction General: The cabinet and door shall be constructed from H32 sheet aluminum alloy which has a thickness of 3 mm. External welds shall be made by using the Heliarc welding method; whereas, internal welds shall be made by the wire welding method. All welds shall be neatly formed and free of cracks, blow holes and other irregularities. All inside and outside edges of the cabinet shall be free of burrs. The cabinet shall be designed to prevent accumulation of water on its top surface. The door opening shall be flanged on all sides which increases strength around openings and keeps dirt, sand and liquid from entering the enclosure when the door is open. A door restraint shall be provided to prevent door closure in windy conditions. Door/Hardware: The door opening shall be a minimum of 80 percent of the front surface area. The doors shall be furnished with a gasket that satisfies the physical properties as found in UL508 table 21.1 and shall form a weather-tight seal between the cabinet and the door. The hinges shall be continuous and bolted to the cabinet and the door utilizing 1/4-20 stainless steel carriage bolts and hylock nuts. The hinges shall be made of 2 mm thick aluminum and shall have 6 mm diameter stainless steel hinge pin. The hinge pin shall be capped top and bottom by weld to render it tamper proof. The hinge leaves shall not be exposed externally when the door is closed, but hinge knuckles may protrude. The latching mechanism shall be a 3-point draw roller type. Push-rods shall be turned edgewise at the outward supports and shall be 6 mm by 19 mm aluminum, minimum. Rollers shall have a minimum diameter of 22 mm and shall be made of nylon. The center catch shall be fabricated from 5 mm aluminum, minimum. An operating handle shall be furnished. The handle shall be stainless steel with a 19 mm diameter shank. The latching handle shall have a provision for padlocking in the closed position. A light/alarm switch bracket shall be provided. Main Chamber: The main chamber shall be designed to meet or exceed the requirements of NEMA 4X. It shall contain four (4) duplex GFI outlets. It shall also incorporate a U/L approved light, activated by and automatic door switch. It shall be grounded. Electrical Center: The electrical center shall be designed to meet or exceed the requirements of NEMA 3R. It shall house all electrical accessories described in the forthcoming ELECTRICAL section of this specification. It shall have provisions for separation of trade and shall be lockable. It shall also be grounded. Fiber Entry/Storage: The fiber entry/storage chamber shall be designed to meet or exceed the requirements of NEMA 3R. It shall have provisions for separation of trade and shall be lockable. It shall be grounded

3 Battery Chamber: The battery chamber shall provide for the housing of up to six (6) 100 AH batteries and support 635 kg via a sliding tray. The battery tray shall extend beyond the face of the enclosure by 635 mm. The compartment shall be ventilated and lockable. It shall also be grounded. 3.3 Cabinet Ventilation (NEMA 3R ONLY) Cabinets requiring ventilation shall be provided with louvered vents in the front door with a removable/replaceable filter. Louvers shall satisfy the NEMA rod entry test for 3R ventilated enclosures. The filter shall cover the vents and shall be held firmly in place with bottom and side brackets and spring-loaded clamps. Exhaust air shall be vented out between the top of the cabinet and door. The exhaust area shall be a series of 3 mm x 25 mm rectangular slots. The ventilation plenum area shall be equipped with a removable plate with provisions for mounting an optional fan assembly. (Note: On NEMA type 4, 4X and 12 enclosures, all louver air intake vents on the door and air exhaust vents in the roof overhang are deleted.) The ventilation system shall be designed to handle a minimum of 2.83 cubic meters of air per minute. 3.4 Equipment Mounting Rack Mounting: The enclosure shall be equipped with adjustable EIA rack(s). Rack(s) are to be fully adjustable to accommodate both 483 mm or 584 mm configurations. Rack(s) may also be adjusted both forward and back to accommodate a variety of equipment mounting needs. Shelves: If equipment is to be shelf mounted, the enclosure shall be provided with shelves fabricated from 5052-H32 aluminum, having a thickness of 3 mm. Aluminum Mounting Panels: If equipment is to be panel mounted, the enclosure shall be provided with a 5052-H32 aluminum panel having a thickness of 3 mm. The panel shall be of natural finish. All mounting hardware shall be furnished. Painted panels are optional. 3.5 Cabinet Finish Unless otherwise specified, the outside surface of the cabinet shall have a smooth, uniform, natural aluminum finish. If painted, the following steps shall be taken as a minimum requirement: A. The cabinet, doors and any other parts to be painted shall be submerged in each tank of a three (3) step iron phosphate conversion technique. B. After phosphatizing, the parts shall be baked to eliminate any moisture in the seams. C. The finish coat of a polyester power paint shall be baked for twenty (20) minutes at 204 C

4 3.6 Electrical D. The finish shall be commercially smooth, substantially free of flow lines, paint washout, streaks, blisters and other defects that would impair serviceability or detract from the general appearance. All electrical accessories are to be housed in the electrical center chamber unless otherwise specified. Electrical accessories include: A 100 amp load center, a 60 amp main disconnect and an A/C receptacle. The main chamber shall have four (4) duplex ground fault receptacles. The main chamber shall be equipped with a UL approved light fixture that operates automatically when the door is opened. All chambers shall be grounded. with ground straps. All doors shall be equipped All components shall be UL approved. 4.0 Cabinet Mounting Mounting instructions shall be provided with the enclosures. Pad mounting kits shall include mounting bracket, mounting hardware, and site preparation. 5.0 Construction Methods 5.1 General Requirements The equipment, design, and construction shall utilize the latest available techniques with a minimum number of different parts, subassemblies, circuits, cards and modules to maximize standardization and commonality. The equipment shall be designed for ease of maintenance. All components shall be readily accessible for inspection and maintenance. The only tools and test instruments required for maintenance by maintenance personnel shall be simple hand held tools, basic meters and oscilloscopes. 5.2 Electric Components All electronic components shall comply with Special Specification, "Electronic Components". 5.3 Mechanical Components All external screws, nuts, and locking washers shall be stainless steel. No self tapping screws shall be used unless specifically approved by the Engineer. All parts shall be made of corrosion resistant material, such as plastic, stainless steel, aluminum or brass

5 All materials used in construction shall be protected from fungus growth and moisture deterioration. Dissimilar metals shall be separated by an inert dielectric material. 5.4 Installation The cabinet foundation shall be included, but measured separately as part of this bid item. The cabinets shall be mounted on a concrete foundation as shown on the plans. The cabinet foundation shall be constructed in accordance with Item 656, "Foundations for Signs, Traffic Signals and Roadway Illumination Assemblies" except for Measurement and Payment. The cabinet shall be grounded to a 16 mm (minimum) copper clad ground rod 2.44 m long driven into the ground and installed in the foundation. 6.0 Documentation Requirements Three (3) copies and one (1) mylar reproducible shall be provided for the following items: A. Complete and accurate final cabinet wiring diagram. B. Complete parts list including names of vendors for parts not identified by universal part numbers such as JEDEC, RETMA or EIA. One set of the documentation shall be placed in the cabinet in a heavy duty plastic envelope approved by the Engineer. The other documentation shall be delivered to the Engineer. 7.0 Testing Requirements 7.1 General. It is the policy of the Texas Department of Transportation to require performance testing of all materials and equipment not previously tested and approved. If technical data is not considered adequate for approval, samples may be requested for test by the Engineer. The contract period will not be extended for time lost or delays caused by testing prior to final Texas Department of Transportation approval of any items. The equipment covered by this specification shall be subjected to Design Approval Tests and Factory Demonstration Tests at the equipment manufacturer's facility to determine conformance with all the specification requirements except that the Engineer may accept certification by an independent testing lab in lieu of the Design Approval Tests, to verify that the Design Approval Tests have previously been satisfactorily completed. The Contractor shall arrange for and conduct the tests in accordance with the testing requirements stated herein. Unless otherwise specified, the Contractor is responsible for satisfying all inspection requirements prior to submission for the Texas Department of Transportation's inspection and acceptance. Texas Department of Transportation reserves the right to have a representative witness all design approval tests and factory demonstration tests

6 The results of each test shall be compared with the requirements specified herein. Failure to conform to the requirements of any test shall be counted as a defect, and the equipment shall be subject to rejection by Texas Department of Transportation. Rejected equipment may be offered again for retest provided all non-compliances have been corrected and retested by the contractor and evidence thereof submitted to the Engineer. 8.0 Measurement The communication hub cabinet will be measured as each unit furnished, installed, and tested in accordance with this Special Specification. The communication hub cabinet foundation shall be measured as each foundation furnished and installed in accordance with this Special Specification. 9.0 Payment Work performed and materials furnished in accordance with this Item and measured as provided under "MEASUREMENT" will be paid for at the unit price bid for each "Remote Communications Hub Cabinet" of the type specified or "Hub Cabinet Foundation". This price shall include all equipment described under this item with all cable and connectors, all documentation and testing; and shall include the cost of furnishing all labor, materials, training and equipment necessary to complete the work