1. Section COVER PAGE: remove and replace with new Cover Page, Attached.

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1 BID ADDENDUM #04 (BID # ) Greenwich Public Schools District Wide Renovations Electric Generator 290 Greenwich Avenue Greenwich, CT Date: June 11th, 2013 KSQ Project #: This Addendum forms part of the Contract Documents and modifies the original bidding documents issued for bid on May 21, 2013 and consists of eleven (11) 8.5 X 11 pages and five (5) 30 x42 sheets. Revisions to Project Specifications: 1. Section COVER PAGE: remove and replace with new Cover Page, Attached. 2. Section LIST OF DRAWINGS: ADD new List of Drawings, Attached. 3. Section SUMMARY OF WORK: A. PART 1, paragraph 1.3, B: Change 7:00 am thru 10:30 pm to read 6:00 am thru 9:00 pm. 4. Section MILESTONE SCHEDULE: A. PART 1, paragraph 1.2, B: Delete June 28, 2013 and replace with the following, July 1, Section SCOPE OF WORK: ADD Section, Attached. 6. Section LOW VOLTAGE ELECTRICAL POWER: ADD Section, Attached. Revisions to Project Drawings: 1. ADD project drawings: A-100, A101, E-001, E-301, E-501 All project requirements, except for those that specifically added or modifies by this Addendum, shall remain in full effect. Eugene H. Watts END OF BID ADDENDUM # 04 Page 1 of 1 BID ADDENDUM #04

2 Volume 1 of 1 CONSTRUCTION DOCUMENTS: MAY 21, 2013 PROJECT MANUAL Greenwich Public Schools Electric Generator Board of Education Bid Number: KSQ Project # Architect: KSQ Architects, P.C. 235 Main Street, Suite 410 White Plains, NY T F Owner: Greenwich Public Schools 290 Greenwich Avenue Greenwich, CT Facility Names: Eastern Middle School 51 Hendrie Ave., Riverside Construction Manager: School Construction Consultants, Inc. 190 Motor Parkway Suite 201 Hauppauge, NY SPECIFICATION COVER PAGE of 1

3 Eastern Middle School Greenwich, CT SECTION SCOPE OF WORK PART 1 GENERAL 1.1 DESCRIPTION A. Provide the work included in accordance with the Contract Documents. 1.2 WORK INCLUDED Provide all labor, materials, equipment, tools, appliances, auxiliaries, services, hoisting, scaffolding, support, supervision, and Project Record Documents, and perform all operations for the furnishing and installing of the complete emergency electrical system with the automatic transfer switch and an updated utility metering with the current transformers, including but not limited to the work described hereinafter. The work shall meet or exceed the latest codes (including national electrical code), regulations and requirements of the local Building Department. If any extended building shutdowns are required they should be considered as included in the scope of work. A. The electrical work is shown schematically on the Drawings to indicate the general system arrangement and configuration. The work of this Division shall include coordination with the work of other Divisions of the Specifications and the Contract Documents so as to provide a complete and operational system capable of being readily operated and maintained, including approved rearrangement of the systems and equipment and rerouting of distribution services to enable the complete system to fit within the confines of the allotted electrical spaces, all to the satisfaction of the Construction Manager/Engineer or as directed by the Construction Manager/Engineer. Catalog cuts used for basis of design of generator, enclosure, fuel tank and exhaust system are attached. B. The work includes, but is not limited to the following:

4 Eastern Middle School Greenwich, CT 1. Install an underground 18 concrete duct bank with 4 4 PVC conduits from the utility pad mounted transformer to the room next to the old transformer room 021. Install 4 sets of 4 AWG#600 copper KCMIL plus AWG#3/0 copper ground in these conduits and connect them to a new 100 KAIC rated utility 1600 amp service breaker in the combination utility metering and service breaker switchboard (Siemens SB1 or equivalent and must meet CL&P requirements) in the new electrical equipment room. 2. Install the CT s to be supplied by CL&P in the above cabinet and provide all wiring per the utility company requirements.

5 Eastern Middle School Greenwich, CT 3. Provide and install metering socket on the wall outside the new electrical equipment room and install required wiring between the meter and the utility CT cabinet. Meter to be provided by CL&P. 4. Provide and install an indoor utility type 1,600 amp 208 volt 3 phase 4 wire Automatic Transfer Switch (ATS) with a switched neutral. The ATS shall be an ASCO 7000 series or an approved equal. This ATS needs to be located in the new electrical equipment room next to the old transformer room Provide and install a 300 kw, 208 volts, 3 Phase 4 Wire diesel engine generator set with a 1200 amp main breaker having 100 KAIC rating housed in a weather protective standard NEMA 3R enclosure with an exhaust system and UL listed base storage tank having a minimum capacity of 1,470 gallons. The diesel engine generator set shall be a Cummins Model 300 DQDAC or approved equal. 6. Provide the grounding system as shown on the drawings for the diesel engine generator set, utility transformer and the ATS per electrical code requirements. 7. Install 4-4 and 2-2 conduits (partially underground concrete duct bank in the back of the building, partially on the floor and overhead through the building and boiler room, and through the staircase to the room next to the old transformer room 021 to be connected to the emergency side of the new 1,600 amp ATS. The 4 conduits shall be used for the main emergency feeder and the 2 conduits shall be used for communications/monitoring and generator enclosure power needs. Use PVC conduits in the concrete duct banks and RGS conduits inside the building. From the generator, the standby/emergency feeder will have 3 sets of 4-AWG# 600 KCMIL conductors plus AWG#3/0 ground to the indoor new automatic transfer switch in the new electrical equipment room next to transformer room 021 and 1 set of 4-AWG#2 conductors plus a AWG#6 ground in the 2 conduit from the generator enclosure to the nearest power panel inside the building. Install the required number of communication and monitoring wires in the other 2 conduit up to the junction box in the boiler room (for connecting into the BMS system) and to the 1600 amp automatic transfer switch for the start-up signal and any others. 8. Install control wires from the ATS to the fire alarm annunciator to indicate the status of the generator per code requirements

6 Eastern Middle School Greenwich, CT 9. Provide and install a 60 amp 12 ckt 208 V 3 phase 4 wire power panel in the transformer room 021 and provide power to this panel from the 1600 amp Siemens Switchboard in the room. Install the required number of ckts in the 2 conduit from this panel and bring them to the generator enclosure outside in the back of the building. 10. Install a short 4-4 conduit duct bank between the existing 1,600 amp Siemens Switch in the old transformer room 021 and the new ATS located in the new electrical equipment room and pull 4 sets of 4 AWG#600 KCMIL plus AWG#3/0 ground and connect to the load side of the ATS later. 11. Currently the utility metering CT s exist in the 1600 Siemens Switchboard and consult with the utility company and ensure disconnection of the old meter and only one meter connection remains in service at any time. 12. Provide any temporary construction power required during the construction and the shutdown periods. 13. Provide and install required equipment supports and miscellaneous steel for electrical equipment as per code requirements. 14. Minimize the required shutdown time when the utility transformer secondary service reconnections and ATS load reconnections are to be made by doing as much construction work as possible ahead of the time. 15. Provide all the required field painting for the new equipment 16. Provide all the testing, adjusting and balancing 17. Provide a minimum of two day training to the facility staff on the operation of the emergency generator.

7 Eastern Middle School Greenwich, CT SECTION LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section Includes: 1. Building wires and cables rated 600 V and less. 2. Connectors, splices, and terminations rated 600 V and less. 1.3 SUBMITTALS During Construction: A. Submittals during construction shall be made in accordance with (Division 1 General Requirements and ). In addition, the following specific information shall be provided B. Submit certified report of factory tests performed in accordance with AEIC CS-3 for approval prior to shipment of cable from the factory. C. Installation test reports D. Product Data: For each type of product. 1.4 INFORMATIONAL SUBMITTALS A. Qualification Data: For testing agency. B. Field quality-control reports. 1.5 QUALITY ASSURANCE A. Testing Agency Qualifications: Member company of NETA or an NRTL. 1. Testing Agency's Field Supervisor: Certified by NETA to supervise on-site testing. 1.6 CONDUCTOR COLOR CODING A. For power conductors, provide all single conductors and individual conductors of multiconductor power cables with integral insulation pigmentation of the designated colors, except conductors larger than No. 6 AWG may be provided with color coding by wrapping the conductor at each end and at all accessible locations with vinyl tape. Where this method of color coding is used, wrap at least six full overlapping turns of tape around the conductor covering an area 1-1/2 to 2 inches wide at a visible location. LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

8 B. Phase A, B, and C implies the direction of positive phase rotation. Eastern Middle School Greenwich, CT C. Use the following colors unless directed otherwise by the owner or Engineer. Verify color coding with owner prior to construction. System Conductor Color All systems Equipment Grounding Green 208Y/120 Volts Grounded Neutral White 3-Phase, 4-Wire Phase A Black Phase B Red Phase C Blue 480Y/277 Volt Grounded Neutral Gray 3-Phase, 4-Wire Phase A Brown Phase B Orange Phase C Yellow D. Testing Agency Qualifications: Member company of NETA or an NRTL. PART 2 - PRODUCTS 2.1 CONDUCTORS AND CABLES A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1. Alpha Wire. 2. Belden Inc. 3. General Cable Technologies Corporation. 4. Southwire Incorporated. B. Single or multi-conductor cables 600 Volts and below: 1. Unless otherwise indicated, provide solid conductors for No. 10 AWG and smaller and stranded conductors for No. 8 AWG and larger for all power wiring. 2. Utilize only conductors meeting applicable requirements of NEMA WC 70/ ICEA S Provide conductors with THHN insulation for dry locations and XHHW-2 insulation for wet and underground applications C. Control and Instrumentation cable: Use Belden 6760 or equivalent #18 AWG copper shielded twisted pair with #20 AWG copper drain wire. D. Conductor Arc and Fireproofing Materials: Use Scotch Brand 77 or Plymouth Plyarc 30 arc and fireproofing tape, Scotch Brand 69 or Plymouth Plyglass cloth electrical tape, or equal. E. Equipment Grounding Conductors: 1. Provide stranded copper conductors, as indicated or as required by NEC for equipment grounding. 2. Provide conductors with green type TW insulation with a minimum thickness of 2/64 inch. 3. Provide equipment grounding conductors in all (PVC) conduits sized as required by NEC table whether indicated on the drawings or not. LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

9 Eastern Middle School Greenwich, CT 2.2 CONNECTORS AND SPLICES A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1. AFC Cable Systems, Inc. 2. Hubbell Power Systems, Inc. 3. O-Z/Gedney; a brand of the EGS Electrical Group. 4. 3M; Electrical Markets Division. 5. Tyco Electronics. B. Description: Factory-fabricated connectors and splices of size, ampacity rating, material, type, and class for application and service indicated. PART 3 - EXECUTION 3.1 General A. Do not exceed cable manufacturer s recommendations for maximum pulling tensions and minimum bending radii. Where pulling compound is used, use only UL listed compound compatible with the cable outer jacket and with the raceway involved. Use pulling means, including fish tape, cable, rope, and basket-weave wire/cable grips, that will not damage cables or raceway. B. Tighten all screws and terminal bolts using torque type wrenches and/or drivers to tighten to the inchpund requirements of the manufacturer and NEC. If manufacturer's torque values are not indicated, use those specified in UL 486A-486B. C. Make splices, terminations, and taps that are compatible with conductor material and that possess equivalent or better mechanical strength and insulation ratings than unspliced conductors. D. Where single conductors and cables in manholes, handholes, vaults, cable trays, and other indicated locations are not wrapped together by some other means such as are and fireproofing tapes, bundle throughout their exposed length all conductors entering from each conduit with nylon, self-locking, releasable, cable ties placed at intervals not exceeding 18 inches on centers. 3.2 Conductors 600 Volts and Below A. Provide conductor sizes indicated on drawings B. Place no more than one conductor in any single-barrel pressure connection. Use crimp connectors with tools by same manufacturer and/or UL listed for connectors of all stranded conductors. C. Soldered mechanical joints insulated with tape will not be acceptable D. Vinyl plastic insulating tape for wire and cable splices and terminations shall be flame retardant, 7-mil thick minimum, rated for 90 degree C minimum meeting the requirements of UL 510. E. Provide terminals and connectors acceptable for the type of material used. F. Arrange wiring in cabinets, switchgear, electrical equipment neatly cut to proper length, remove surplus wire, and bridle and secure in an acceptable manner. LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

10 Eastern Middle School Greenwich, CT G. Terminate control wiring with methods consistent with terminals provided, and in accordance with terminal manufacturer s instructions. Where terminals provided will accept such lugs, terminate all control and instrumentation wiring with insulated compression lugs, Thomas & Betts Sta-Kon, or equal. H. For terminals designed to accept only bare wire compression terminations, use only stranded wire, and terminate only one wire per terminal. Tighten all terminal screws with torque screwdriver to recommended torque values. I. Attach compression lugs with a tool specifically designed for that purpose which provides a complete, controlled crimp where the tool will not release until the crimp is complete. Use of plier type crimpers is not acceptable. J. Cap spare conductors and conductors not terminated with UL listed end caps. K. Where conductors pass through holes or over edges in sheet metal, remove all burrs, chamfer all edges, and install bushings and protective strips of insulating material to protect the conductors. L. For conductors that will be connected by others, provide at least 6 feet spare conductor in freestanding panels and at least 2 feet spare in other assemblies. Provide more spare conductor in any particular assembly where it is obvious that more conductor will be needed to reach the termination point. M. Support cables according to Section "Hangers and Supports for Electrical Systems." N. Complete raceway installation between conductor and cable termination points according to Section "Raceways and Boxes for Electrical Systems" prior to pulling conductors and cables. O. Install exposed cables parallel and perpendicular to surfaces of exposed structural members, and follow surface contours where possible. 3.3 Control and Instrumentaion Cables Below 600 Volts A. Do not splice without permission of the Engineer. Locate splices, when permitted, only in readily accessible cabinets or junction boxes using terminal strips. B. Maintaining the integrity of shielding of instrumentation cables is essential to the operation of the control systems. Take special care in cable installation to ensure that grounds do not occur because of damage to the jacket over the shield. 3.4 IDENTIFICATION A. Identify conductors and cables according to Section "Identification for Electrical Systems." B. Identify each spare conductor at each end with identity number and location of other end of conductor, and identify as spare conductor. 3.5 FIRESTOPPING A. Apply firestopping to electrical penetrations of fire-rated floor and wall assemblies to restore original fire-resistance rating of assembly as per code requirements. 3.6 FIELD QUALITY CONTROL & TESTING: LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

11 Eastern Middle School Greenwich, CT A. Perform the following tests and inspections: 1. After installing conductors and cables and before electrical circuitry has been energized, test service entrance and feeder conductors for compliance with requirements. 2. Perform each visual and mechanical inspection and electrical test stated in NETA Acceptance Testing Specification. Certify compliance with test parameters. 3. Perform insulation resistance testing of all power and control circuits below 600 volts with a 500- volt megger, applied for ten minutes and note the insulation resistance values at 30 second, 60 second and 10 minute time intervals. 4. Disconnect equipment that might be damaged by this test. Perform tests with all other equipment connected to the circuit B. Test and Inspection Reports: Prepare a written report to record the following and submit a copy for approval to the Engineer: 1. Procedures used. 2. Results that comply with requirements. 3. Results that do not comply with requirements and corrective action taken to achieve compliance with requirements. C. Cables will be considered defective if they do not pass tests and inspections. END OF SECTION LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

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