HomeMy WebLinkAboutAgenda Report - October 5, 1994 (57)0
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CIN OF LODI COUNCIL COMMUNICATION
AGENDA TITLE: Specifications and Advertisement for Bids for
Underground Primary Electrical Cable
MEETING DATE: October 5, 1994
PREPARED BY: Electric Utility Director
RECOMMENDED ACTION: That the City Council approve the specifications
and authorize advertisement for bids for the
purchase of 30,800 feet of #2/0, and 21,000 feet
of #2, 15kY jacketed underground primary conductor
for the Electric Utility Department.
BACKGROUND INFORMATION: This cable will be needed for installation in
at least eight new residential and commercial subdi-
visions scheduled during the next twelve months, and
to provide an inventory for routine or emergency
maintenance of the existing electrical system.
Some of the developments where this cable is required are Sunwest Plaza,
Johnson Ranch 3, Century Meadows 1 and 2, Towne Ranch 2 and 3, Lodi West 2,
and the Big 5 Sporting Goods store. Cable installations are also scheduled
for the Industrial Substation, and for the Washington Street/Poplar Street
project.
FUNDING:
BID OPENING DATE:
Included in the Electric Utility Department's 1994/
1995 fiscal year budget.
Estimated cost: $60,000
Wednesday, October 26, 1994
Henry J. Rice, Electric Utility Director
Prepared by Joel Harris, Purchasing Officer
APPROVED �-1--'----- ----- --- -- %141THOMAS A PETERSON lecruea oaoe
City Manager
CC-
CITY OF LODI ELECTRIC UTILITY DEPARTMENT
EQUIPMENT SPECIFICATIONS
15 -KY, XLPE INSULATED, JACKETED AND NON-JACKETED,
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 for 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, AEIC 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,
stranded 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-linked, thermosetting
polyethylene. The extruded shield shall have an average thickness of
not less than 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.
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C.
Insulation
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Insulation shall be unfilled, semi -transparent, cross-linked
thermosetting 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 90% of this
value.
yr.
D.
Insulation Shield
The insulation shielding shall be extruded and shall consist of one
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layer of virgin black semi -conducting, cross-linked thermosetting
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polyethylene, compatible with and extruded over the insulation. It
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shall maintain its shielding properties after exposure to normal
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operating temperatures and environs. The insulation shield compound,
and thickness shall be in accordance with ASIC Standard.
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E.
Construction Method
Conductor shield, insulation and insulation shield shall be installed
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on the conductor using the triple extruding, dry cure method.
6
F.
Concentric Neutral
The concentric conductor shall be composed of a number of round
annealed bare (uncoated) copper wires helically wrapped around the
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cable. The number and size of the neutral wires shall be as specified
in Table I. The length of lay shall not be less than 6 nor more than
10 times the diameter over the concentric wires.
G. Overall Jacket (if required on Proposal Form)
An extruded, encapsulating and insulating layer of linear, low density
black polyethylene, (Union Carbide DFDB 6425, British Petroleum BP D
995, or approved equivalent) shall be applied over the concentric
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S#CABLEX/TXTU.01D
neutral wires in accordance with ICEA S-66-524, Part 4.3, except where
modified by this Specification. The minimum thicknesses of. this
encapsulating jacket over the concentric wires shall be as follows:
Conductor Size Minimum Thickness
(AWG or KCM) (Mils)
#2 50
#2/0 80
750 b 1,000 110
H. 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
manufacturer's expense.
I. Specific Requirements
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Any conditional bids such as "subject to availability in stock" will ;
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be rejected. Cable shall be furnished according to Table I below: }
TABLE I
Conductor Size
Conc. Neutral
NEMA
AWG or KCM
Size - AWG
Material
Insulation
Reel Code
(No. of Strands)
(Min. No. of Wires)
Phase (Neut.)
Thick. (Mils)
Number
#2 (7)
#14 (10)
Alum. (Cu)
220
5832
#2/0 (19)
#14 (9)/#12 (6)
Alum. (Cu)
220
5832
750 (61) #12 (24)/#10 (15) Alum. (Cu) 220 7848
1,000 (61) #10 (20) Alum. (Cu) 220 7848
NOTE: Refer to proposal forms for specific sizes, quantities and jacketing
requirements.
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S#CABLEX/TXTU.01D
J. Reels
1. Makeup and Length: ,
Reels are to be shipped full to their maximum capacities.
2. Packaging:
Each cable reel shall have adequate protective covering across the
flanges. Such covering to consist of wood members from flange to
flange covering 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 of conductor, insulation type ana
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 penetration of
moisture. There shall be no water in the stranded conductor of the
cable when the reel is shipped. Reels shall be shipped upright. All
shipments shall be prepaid, F.O.B. Lodi, California.
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