SPECIAL SPECIFICATION 1276 Pedestrain Overpass Lighting

Transcription

1 1993 Specifications CSJ SPECIAL SPECIFICATION 1276 Pedestrain Overpass Lighting 1. Description. This Item shall govern for furnishing and installing the various types of lighting fixtures, and other items necessary to form a complete and independent lighting system as shown on the plans. The term Pedestrian Overpass Lighting as used herein shall constitute the complete assemblage of poles, mast arms, internal conductors, fixtures, lamps, equipment and miscellaneous components erected as shown on the plans and in accordance with these specifications. 2. General. All materials furnished by the Contractor under this contract shall be new, ULlisted, and shall meet NEMA, NEC, and the Electrical Detail requirements. All materials submittals shall be submitted to the Engineer for approval fabrication, 2 copies of the completed material identification form shall be furnished to the Engineer in accordance with Item 441, Steel Structures. All materials and construction methods shall be in accordance with the details shown on the plans, the requirements of this Item and the pertinent requirements of the following Items: Item 616, Performance Testing of Lighting Systems Item 618, Conduit Item 620, Electrical Conductors Item 628, Electrical Services 3. Materials. (1) The 100 watt metal halide (MH) area fixture shall be mounted at 12 ft.-4 in. on a 4 in. diameter steel base support. The base support shall be in accordance with structural details, base pole shall be non-tapered circular structural pipe welded to upper steel plate of 12 in. diameter columns. Unless otherwise approved by the Engineer the base support shall be galvanized as specified on structural drawings and free of scratches. The area fixture filter shall be 1-piece cast aluminum. The upper housing shall be spun aluminum. The top shall be removable to access the ballast. The top shall be secured with 2 captive, slotted screws. All hardware shall be stainless steel. The lens shall be one piece molded clear acrylic with a lightly diffused finish. The lamp shall be accessed by removing the top cover and opening the lamp compartment. The reflector shall consist of specular and semi-specular die formed panels precisely positioned within the reflector housing. The reflectors shall meet IES-ANSI specifications for full cut off reflectors. The reflector module shall be accessible for re-lamping by loosening one captive fastener on the hinged, cast aluminum doorframe. The doorframe shall be sealed

2 to the housing with a silicone compression gasket. A tempered glass lens shall be sealed to the doorframe. Electrical voltage shall be 120 volt with multi-tap installed ballast. All electrical components shall be sealed with an aluminum cover. All electrical components and materials shall be U.L. recognized. Ballast shall be high power factor rated for 30 Deg. Starting. Medium base sockets shall be rated 4 KV. Mounting of fixture shall be slipped over 4 in. O.D. pipe. Fixture finished shall be galvanized color and shall be top coated with a thermoset TGIC super polyester powder coat finish. The finish shall pass a 3000 hrs salt spray test for corrosion resistance. Fixture shall be listed as an outdoor, wet location use, UL 1570 and 1572 and Canadian CSA C22.2 no. 9.IP=54. Fixture shall be warranted to be free of defects for 3 years. Ballast shall carry the ballast manufacturer s limited warranty. (2) The 100-watt metal halide in ground landscape flood light fixture shall be encased in concrete within fixture manufacturer s provided casing. The fixture housing shall be compression molded, fiberglass reinforced polyester composite. Fixture shall have an integrated junction box with 3/4 in. conduit entries with provisions for a field drilled and tapped branch outlet. Shall be provided with re-enterable potting compound provided to seal junction box. Junction box cover shall incorporate waterproof connector with pigtails for field wiring connections. External lens shall be soda-lime glass for high impact resistance. Flat lens shall incorporate a slight crown to assist in water runoff. Lens shall be slip resistant and have concentric rings sandblasted into the surface for added traction without harming the mechanical integrity of the lens. External lens gasket shall be high temperature 40-durometer silicone for perfect seal in extreme conditions. Lamp module shall be constructed of high temperature (200 C) Ryton material for maximum strength and durability. Electrical connections shall be waterproof. Flood reflector shall be brushed aluminum protected by an open cell silicone gasket and an internal lens that keeps optics clean during installation. Lamp module shall have an integral thermal protection. Interlock switch shall be provided as an added safety feature for personnel. Interlock switch shall be designed to disconnect ballast primary voltage whenever the lamp module is removed from housing. Junction box cover shall have an incorporated wiring hardness for easy selection of ballast primary voltage and make field-wiring connections with the liquid-tight connectors. The ballast module shall be multi-tap and waterproof. High temperature cords and connectors shall be waterproof and provided with strain relief to ensure that ballast will retain waterproof integrity when lifted by cord. Ballast shall be encapsulated in weatherproof, two parts epoxy. All capacitors shall be rated for 100 C for double life. Fixture shall be U.L approved for wet locations and shall be warranted to be free of defects for 3 years. (3) The 120/240 Volt, 16 poles, 100 amp MCB, single phase electrical panel shall be UL listed and rated 22,000 AIC Min. Panel shall be provided with solid copper bus and

3 branch fingers. Fingers shall be tin-plated. Enclosure shall be rated NEMA 3R and shall be manufactured from cold rolled 16 gauge-galvanized steel. Enclosure shall be finished with an electrostatic powder coat, backed urethane paint process. Enclosure shall be provided with a factory installed ground bar and neutral bar. Enclosure shall be designed for bottom feed. Panel shall be provided with 1P20A circuit breakers as shown on drawings. (4) The electrical lighting contactor shall be rated 30 amp, 10 poles, with 120 Volt control coil and a HOA switch installed on enclosure door. Contactor coil shall be wired through out a photocell installed on outdoor electrical enclosure sidewall. Lighting contactor shall be provided in a NEMA 3R enclosure. Lighting contactor assembly shall be installed on a back plate installed inside the electrical outdoor enclosure. (5) The electrical outdoor enclosure shall be 36 in. wide by 48 in. high by 12 in. deep. Enclosure shall be provided with an aluminum made back plate for equipment installation. Enclosure shall be provided with a full size door and continuous hinge. Door shall have ventilation louvers on front and be provided with insect screen. Door lock mechanism shall make locking contact at 3 different places around door perimeter and shall be provided with a vandal proof lock mechanism. Enclosure shall be provided with a sloped roof to maintain water off top. Roof shall be designed with a louver system to allow heat to dissipate from inside enclosure. Enclosure shall be attached to foundation provided by civil contractor by minimum 4 anchor bolts at the internal side of enclosure. Enclosure material shall be stainless steel 316 with a minimum thickness of 12 gauge. Enclosure shall be manufactured with no sharp edges. (6) Pull box enclosures shall be designed for 8000# with a minimum of 12000# test load. Pull boxes shall be made of polymer concrete, gray color non-conductive material. Boxes shall be provided with stainless steel inserts and bolts, skid resistant covers and shall be installed flush with concrete finish. Box size shall be 6 in. wide by 8 in. long by 6 in. deep. Contractor shall drill conduit holes on the width side (6 in.) of enclosure. Cover shall be permanently marked with the logo High Voltage Electric. (7) 120 volt GFI, 20 Amp receptacle shall be installed on internal back plate of outdoor enclosure and shall be provided with a weatherproof cover. Receptacle shall be installed in a 2 in. by 4 in. cast metal box. Box shall be grounded to the rest of the system as per NEC code. (8) Electrical Photocell shall be sized to handle electrical load caused by lighting contactor coil. Photocell shall be installed inside outdoor enclosure and have cell facing west through a high impact resistance glass window (see item 9 below). (9) High impact resistance window shall be installed on west side of NEMA 3R enclosure to protect internally installed electric photocell. Window shall be round and provided with a gasket around window perimeter to keep enclosure NEMA 3R rating. Window shall be 3 in. O.D. or sized as per photocell installed to provide enough daylight to deenergize lighting contactor during daytime. 4. Construction Methods. Lighting fixtures shall be fabricated and installed in accordance with this specification, the details and dimensions shown on the plans, the electrical details or as approved in writing by the Engineer. Area light fixtures shall be located as shown on

4 the plans. Landscape flood light fixtures shall be installed as shown on plans and coordinated with landscape contractor before installation of fixtures and underground conduit. The area light fixtures shall be installed on a 4 in. O.D. pipe provided welded on top of 12 in. columns. Contractor shall install it using only stainless steel hardware sized as per light fixture mounting sleeve requirement. All fixtures shall have same orientation. All electrical conduits sizes shall be as shown on drawings. Contractor shall install all conduits coordinating with work of others trades to minimize interference. All conduits passing through concrete expansion joints shall be provided with a conduit expansion joint and sleeve. Conduit expansion joints shall be provided with a grounding jumper not smaller than #6 AWG. All grounding grid connections within concrete encasement shall be done utilizing an exothermic connection. All grounding connections to metal columns and equipment shall be done internally unless otherwise noted on drawings, using a mechanical post type connector made of copper alloy and designed for single wrench installation. Ground grid passing through concrete expansion joints shall be provided with a sleeve and a minimum 4 in. wire slack of grounding conductor to allow concrete expansion. 5. Lighting Equipment and Illumination Requirements. Lighting fixtures, and associated accessories as herein specified and as indicated on the drawings shall be furnished and installed by the Contractor. References to manufacturer s and illumination criterion indicated on the drawings and specified herein are intended to establish the minimum requirements of illumination, quality, durability, and longevity of service. Substitute products may be proposed by the Contractor if and only if the proposed substitute fixtures are equivalent to the specified fixtures with regard to all such characteristics. Point-by-point photometric drawings shall be included with the submitted data. These drawings shall indicate the level of illumination in units of footcandles on the entire surface of the pedestrian bridge. Point indications for such levels shall be spaced maximum 2 ft.-0 in. on center. Illumination levels and associated ratios will be required as hereinafter specified. Illumination zones shall be defined as follows: the 16 ft. space between columns shall be referred to as the inner zone. The 2-11 ft. spaces between the columns and the guard rails shall be referred to as the outer zones. Required illumination levels and ratios are as follows. Average Inner Zone Illumination: 5 footcandles. Maximum Inner Zone Point Illumination: 5.2 footcandles. Minimum Inner Zone Point Illumination: 4.6 footcandles. Average/Minimum Inner Zone Point Ratio: 1.1:1. Maximum/Minimum Infield Point Ratio: 1.15:1. Average Outer Zone Illumination: 3.8 footcandles

5 Maximum Outer Zone Illumination: 5.1 footcandles. Minimum Outer Zone Illumination: 1.9 footcandles. Average/Minimum Outer Zone Point Ratio: 2:1. Maximum/Minimum Outer Zone Point Ratio: 2.7:1. 6. Acceptance. Final acceptance of the system will not be made until the system has operated satisfactorily for a period of 14 Days (this includes energizing and de-energizing the lighting circuits at dusk and dawn) and as described in Item 616. All circuits shall be test clear of faults, grounds and open circuits. 7. Measurement. This Item will be measured as a lump sum unit, complete in place. 8. Payment. The work performed and the materials furnished in accordance with this Item and measured as provided under Measurement will be paid for at the unit price bid for Pedestrian Overpass Lighting. This price shall be full compensation for furnishing installing and testing all the fixtures, ballasts, lamps, internal conductors and connections, equipment and incidentals necessary to complete work. Testing will be in accordance with Item 616 Performance Testing of Lighting Systems. Conduit will be paid under Item 618, Conduit. Electrical Conductors will be paid for under Item 620, Electrical Conductors". Electrical Services will be paid for under Item 628, Electrical Services