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HomeMy WebLinkAboutAgenda Report - December 20, 1989 (70)COUNCIL COMMUNICATION TO: THE CITY COUNCIL COUNCIL MEETING DATE I NO. FROM: THE CITY MANAGER'S OFFICE DECEMBER 20, I 1989 i I SUBJECT: SPECIFICATIONS AND ADVERTISEMENT FOR BIDS FOR THE PURCHASE OF PRIMARY OVERHEAD. PRIMARY UNDERGROUND, AND SECONDARY UNDERGROUND ELECTRICAL CABLE RECOMMENDED ACTION: That the City Council approve the specifications and authorize the advertisement for bids for the purchase of various sizes of overhead and underground conductor as detailed below: Primary Overhead Conductor #4/0 Bare Aluminum 14,000 feet #477 Bare Aluminum 45,000 feet 15KV Concentric Primary Under4round Conductor #2AWG, Jacketed 25,000 feet #2/OAWG 20,000 feet #750 KCM 20,000 feet #1000 KCM, Jacketed 22,000 feet Secondary Underground Conductor #350 KCM Triplex 20,000 feet BACKGROUND INFORMATION:- The overhead conductor is being purchased to support planned distribution system improvements budgeted for this fiscal year, and to provide an inventory of cable to cover other needs as they develop. The improvements are expected to require about 12,000 feet of #4/0 and 33,000 feet of #477 conductor. The underground primary cable is being purchased to support projects in the Sunwest subdivisions, the Kettleman Lane/Lower Sacramento Road development, at the substations, and in budgeted distribution system improvements. These specific needs are expected to take about 15,000 feet of #2AWG, 7,000 feet. of #2/OAWG, 10,000 feet of #750KCM, and 16,000 feet of #1000KCM. The balance of the quantities purchased would provide an inventory tc cover other requirements as they develop. The #350KCM Triplex is being purchased mainly to re-establish a working inventory, although abou.: 3,000 feet is planned for use in the Sunwest subdivisions. The anticipated cost of this purchase is about $235,000; funding is available in the Electric Utility Department's Operating Fund. The bid opening date has been set for Tuesday, January 16, 1990. 74 e,. J . Harris, P61rchasing Officer cc: Electric Utility Directcr Assistant Electric Utility Director Electrical Engineer EQUIPMENT SPECIFICATION OVERHEAD CONDUCTORS, 477.0 KCM, BARE ALUMINUM AAC This specification is for stranded aluminum overhead conductor, suitable for use in the City of Lodi's 12.0 kv overhead distribution system. SPECIFIC SPECIFICATIONS: 477.0 KCM all aluminum conductor (AAC), 19 strand, Class AA. Code Name: COSMOS. �y 110 ��NRE The conductor shall meet the requirements of the latest edition of the applicable NEMA, ASTM and ANSI standards, unless otherwise noted in this specification. Conductor to come in reels of 8,000 feet (nominal). Each end of the conductor shall be firmly secured to the reel. No lagging is required. All shipments shall be prepaid, F.O.B. Lodi, Califorsia. Reels shall be shipped upright. REEL MARKING: Each reel shall be marked with a durable label securely attached to a flange of the reel and plainly marked stating the destination, the purchaser's order number, shipping length of conductor on reel, weight of reel (tare weight), total weight of the conductor on reel, type and size of conductor and code name. MAKE UP AND LENGTHS:. NEMA standard code reel #6628 (66 in. flange diameter, 28 in. traverse width) shall be used. Conductor length on each reel shall be 8,000 feet (nominal). ENGINEERING STANDARD C17Y OF LO D I OVERFiF2.D CONDUCTOR, PRIMARY, 477.0 KCM ELECTRIC UTILITY DEPARTMENT ATE DRAWN CHECKED a!�-� SKEET OF J APPROVAL REVISION CITY OF LODI ELECTRIC UTILITY DEPARTMENT 13 I1 IENI SPECIFICATIONS 15 -KV, XLPE IlqRJLATM, JACK=, CONCENTRIC NEUTRAL CABLE 1.0 GENERAL Cable furnished under these specifications shall be limited to cross-linked thermosetting polyethylene (XLPE) insulated concentric neutral cable rated 15,000 volts and suitable fcr installation in ducts or for direct burial in earth, in wet or dry locations, with normal conductor temperatures up to 90°C. Cables furnished shall meet the requirements of the applicable NEMA, ICEA, ASIC and ASTM Standards, latest edition thereof, unless otherwise noted in this Specification. 2.0 CABLE A. Conductor Insulated conductor shall be aluminum alloy, EC Grade, Class B standard or compressed strand, three-quarter or half hard. B. Conductor Shield The conductor (strand) shielding shall be extruded and shall consist of virgin black semi -conducting cross -1 inked, thermosetting polyethylene. The extruded shield shall have an average thickness of not less thar 15 mils when measured over the top of the strands and a minimum thickness of not less than 12 mils. The outer surface of the conductor shield shall be cylindrical and shall be firmly bonded to the overlaying insulation. S-1 12/12/89 S/CABLEX/TXTU.01D C. Insulation Insulation shall be unfilled, semi -transparent, cross-linked polyethylene extruded directly over the conductor shield. The average insulation thickness shall not be less than 220 mils and the minimum thickness shall not be less than 50%of this value. D. Insulation Shield The insulation shielding shall be extruded and shall consist of one layer of virgin black semi -conducting polyethylene or semi -conducting cross-linked polyethylene, compatiblr, with and extruded over the i ns,:l ati on. It shall maintain its shielding properties after exposure to normal operating temperatures and environs. The thickness of tj,a insulation shield shall be in accordance with Table I below. TABLE I Thickness of Extruded Insulation Shield (Mils) Diameter of Care (Inches) Average NIUMMUM 0 - 1.000 3G 24 1.00.1 - 1.500 50 40 1.501 - 2.000 70 56 E. Construction Method Conductor shield, insulation and insulat on shield sha 1 be installed on the conductor using the triple extruding, dry cure me :hod. F. Concentri c Neutral The concentric conductor shall be composed of a number of round annealed bare (uncoated) copper wires helically wrapped around the cable. The number and size of the neutral wires shall be as spec,fied in Table I I . The length of lay shall not be less than 6 nor more than 10 times the diameter over the concentric wires. S-2 12/12/89 S/CABLEX/TXTU.OID G. Testing and Guarantee Testing of cable shall be performed according to procedures set forth by the ICEA, AEIC and ASTM Standards. Certified copies of pass/fail test results shall be supplied. Any cable found defective either upon inspection, testing or installation will be returned at the manufactorer's expense. H. Overal' Jacket An extruded, encapsulating and insulating layer of linear, low density black polyethylene, (Union Carbide DFDB 6425 or approved equivalent) shall be applied over the concentric neutral wires i n . accordance with ICEA 5-66-524, Part 4.3, except where modified by this Specification. The minimum thicknesses of this encapsulating jacket over the concentric wires are as follows: Conductor Size (,AWG or KCWI 82 #2/0 750 & 1,000 Minimum Thickness �Milcl� 50 80 110 1. Specific Requirements Any conditionsl bids such as "subject to availability in stock" will be rejected. Cable shall be furnished according to Table II below: TABLE II Conductor Size Conc. Neutral NEMA AWG or KCM Size - AWG Material Insulation Real Code (No. of Strands) (Min. No. of Wires) Phase (Neat.) Thick. (Mils) Number 12 (7) f14 (10) Alum. (Cu) 220 5832 #2/0 (19) #14 (9)/#12 (6) Alum. (Cu 220 5832 750 (61) f12 (24)/010 (15) Alum. (Cu) 220 7848 1,000 (61) #10 (20) Alum. (Cu) 220 7848 NOTE: Refer to proposal forms for specific sizes and quantities. 5-3 12/12/89 SiCABLEX/TXTU.OID J. Reels 1. Makeup and Lenath: Cable length on each reel shall be in accordance with Table III be 1 ow: TABLE III Conductor Size (AWG cr KCM) Cable Length (Feet) #2 4,000 ± 4% #2/0 2,500 ± 4% 750 2,500 ± 40% 1,000 2,000 ± 4% 2. Packaping: Each cable reel shall have adequate protective covering across the flanges. Such covering to consist of wood members from flange to flange cc'.ering the entire circumference of the reel (lagging). The lagging shall be nailed to the flange perimeters and shall be further secured with at least two steel bands around the reel. Each end of the cable shall be firmly secured to the reel. 3. Marking: Each reel shall be marked with a durable label securely attached to a flange of the reel and plainly marked stating the - destination, the purchaser's order number, shipping length of cable on reel , weight of reel (tare weight), total weight of cable on reel, type and size o f conductor, insulation type and thickness, voltage rating and manufacturer's identification number. K. Shipping Cable ends shall be adequately sealed with a water seal -type material and plastic end caps secured by tape to prevent the penetration of moisture. There shall be no water in the stranded conductor of the 5-4 12/12/89 S/CABLEX/TXTU.CiC cable Wm the reel is stripped. Reels shall be shipped upright. All shipments shall be prepaia, F.O.B. Lodi, California. s-5 12/12/89 5/CRBLEX/TXTU.0IU EQUIPMENT SPECIFIuATIONS 600 -VOLT XLPE TRIPLEX CABLE 101:4010:7_1m CABLE FURNISHED UNDER THESE SPECIFICATIONS SHALL BE LIMITED TO CROSS-LINKED POLYETHYLENE INSULATED CABLE RATED 600 VOLTS AND SUITABLE FOR INSTALLATION IN DUCTS OR FOR DIRECT BURIAL IN EARTH, IN WEE OR DRY LOCATIONS, WITH NORMAL CONDUCTOR TEMPERATURES UP TO 90 DEGREES C. CABLES FURNISHED SHALL MEET THE REQUIREMENTS OF THE APPLICABLE NEMA, ICEA, AEIC AND ASTM STANDARDS, LATEST EDITION THEREOF, UNLESS OTHERWISE NOTED IN THIS SPECIFICATION. CABLE: A. CONDUCTOR: THE CONDUCTOR SHALL BE ALUMINUM ALLOY, EC GRADE, 1/2 TO '/4 HARD, CLASS B STRANDING. B. INSULATION : PHASE CONDUCTOR INSULATION SHALL BE SINGLE -PASS, BLACK, CROSS-LINKED POLYETHYLENE. THE NEUTRAL CONDUCTOR SHALL HAVE YELLOW XLPE INSULATION OR BLACK XLPE INSULATION WITH YELLOW EXTRUDED STRIPES. C. ASSEMBLY: THE ASSEMBLED CABLE SHALL CONSIST OF PHASE AND NEUTRAL CONDUCTORS TWISTED TOGETHER WITH A LAY NOT LESS THAN 50 NOF MORE THAN 60 TIMES THE OUTSIDE DIAMETER OF ONE OF THE PHASE CONDUCTORS- ALL CABLE ENDS SHALL BE SEALED TO PREVENT THE ENTRFNCE OF MOISTURE. D. IDENTIFICFTION: EACH CONDUCTOR SHALL HAVE A PERMANENT MARKING SHOWING THE MANUFACTURER'S, NAME, VOLTAGE RATING, CONDUCTOR SIZE AND TYPE GF INSULATION. E. TESTING AND GUARANTEE: TESTING OF CABLE SHALL BE PERFORMED ACCORDINr3 TO PROCEDURES SET FORTH BY THE ICEA, AEIC AND ASTM. CEPTIFIED COPIES OF PASS/FAIL TEST RESULTS SHALL BE SUPRL 7 ED. ANY CABLE FOUND DEFECTIVE EITHER UPON INSPECTION, TESTING OR INSTALLATION WILL BE RETURNED AT THE MANUFACTURER'S EXPENSE. F. SPECIFIC REGUIRE-MENTS: CABLE SHPLL BE FURNISHED ACCORDING TO TPBLE 1 AS SHOWN BELOW. ANY CONDITIONAL BIGS SUCH AS "SUBJECT TO AVAILABILITY IN STOCK" WILL BE REJECTED. G. SHIPPING: CABLE ENDS SHALL BE ADEQUATELY SEALED WITH A WGTER SEAL -TYPE MATERIAL AND PLASTIC END CAPS SECURED EY TAPE TO FREVENT THE PENETRATION OF MOISTURE. THERE SHALL BE NO WATER IN THE STRANDED CONDUCTOR OF THE CABLE V*EN THE REEL IS SHIPPED. ALL SHIPMENTS SHALL EE PREPAID, F.O.B. LODI, CALIFORNIA. REELS SHALL EE SHIPPED UPRIGHT. REELS: A. MAKEUP AND LENGTH: THE SPECIFIED CONDUCTOR' SHALL EE SUPPLIED ON NEMA STANDARD HEELS IN ACCORDANCE WITH TABLE 1_ B_ PACKAGING: EACH CPFLE REEL SHALL HAVE ADEQUATE PROTECTIVE_ COVERING ACROSS THE FLANGES, SUCH COVERING TC CONSIST OF WOOD MEMBERS FROM FLANGE TO FLANGE COVERING THE ENTIRE CIRCUMFERENCE OF THE REEL (LAGGING), THE LAGGING SHALL BE NAILED TO THE FLFNGE PERIMETERS AND SHALL BE FURTHER SECURED WITH AT LEAST TWO STEEL BANDS AROUND THE REEL. EACH END OF THE CABLE SHALL RE FIRMLY SECURED TO THE REEL. C. MARKING: EACH REEL SHALL BE MARk'ED WITH A DURABLE LABEL SECURELY ATTACHED TO A FLANGE OF THE REEL Alv7 F LA I NY MARtCE i7 -TATI N(-3 THE DESTINATION, THE PURCHASER'S ORDER NUMBER, SHIPPING LENGTH OF CABLE ON REEL, TYPE AND S I ZE OF C� !NOL:cT� :RS , INSULATION TYPE AND THICKNESS, VOLTAGE RATING AND MANUFAC T '_}RER ' S I DENT I F I CATION NUMBER. CONDUCTOR SIZE i CODE WORD MATERIAL NEMA STANDARD PHASE (NEUTRAL) REEL CODE NO. i #2 (#2) AWG RAMAPO/YES ALUM. 3624 #1/0 (#i/0) AWG BERGEN/YES ALUM. 3424 350 MCM (#4/0) AWG WF_SLEYANtYES ALUM. 7736 G. SHIPPING: CABLE ENDS SHALL BE ADEQUATELY SEALED WITH A WGTER SEAL -TYPE MATERIAL AND PLASTIC END CAPS SECURED EY TAPE TO FREVENT THE PENETRATION OF MOISTURE. THERE SHALL BE NO WATER IN THE STRANDED CONDUCTOR OF THE CABLE V*EN THE REEL IS SHIPPED. ALL SHIPMENTS SHALL EE PREPAID, F.O.B. LODI, CALIFORNIA. REELS SHALL EE SHIPPED UPRIGHT. REELS: A. MAKEUP AND LENGTH: THE SPECIFIED CONDUCTOR' SHALL EE SUPPLIED ON NEMA STANDARD HEELS IN ACCORDANCE WITH TABLE 1_ B_ PACKAGING: EACH CPFLE REEL SHALL HAVE ADEQUATE PROTECTIVE_ COVERING ACROSS THE FLANGES, SUCH COVERING TC CONSIST OF WOOD MEMBERS FROM FLANGE TO FLANGE COVERING THE ENTIRE CIRCUMFERENCE OF THE REEL (LAGGING), THE LAGGING SHALL BE NAILED TO THE FLFNGE PERIMETERS AND SHALL BE FURTHER SECURED WITH AT LEAST TWO STEEL BANDS AROUND THE REEL. EACH END OF THE CABLE SHALL RE FIRMLY SECURED TO THE REEL. C. MARKING: EACH REEL SHALL BE MARk'ED WITH A DURABLE LABEL SECURELY ATTACHED TO A FLANGE OF THE REEL Alv7 F LA I NY MARtCE i7 -TATI N(-3 THE DESTINATION, THE PURCHASER'S ORDER NUMBER, SHIPPING LENGTH OF CABLE ON REEL, TYPE AND S I ZE OF C� !NOL:cT� :RS , INSULATION TYPE AND THICKNESS, VOLTAGE RATING AND MANUFAC T '_}RER ' S I DENT I F I CATION NUMBER.