Skyline College
Bid No. 86513

Building 8 Swing Space Revisions

 

Section 16120           LOW VOLTAGE WIRE AND CABLE

Part 1           GENERAL

1.01.                      Description of Work:

A.                  The work of this Section consists of providing all wire and cable rated 600 volts or less, including splices and terminations, as shown on the Drawings and as described herein.

1.02.                      Related Work:

A.                  See the following Specification Section for work related to the work in this Section:

1.                   16110     Conduits, Raceways and Fittings.

2.                   16130     Junction and Pull Boxes.

3.                   16140     Wiring Devices

1.03.                      Standards and Codes:

A.                  Work and materials shall be in compliance with and according to the requirements of the latest revision of the following Standards and Codes:

1.                   American Society for Testing and Materials (ASTM):

a.                   B3-90, Specification for Soft or Annealed Copper Wire.

b.                   B8-86, Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard or Soft.

c.                   B173-90, Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conductors.

2.                   Federal Standards (FED. STD.):

a.                   228, Methods of Testing Insulated Cable and Wire.

3.                   Federal Specifications (FS):

a.                   J-C-30A(1),  Electric Cable and Wire.

b.                   HH-I-595, Pressure Sensitive Electrical Plastic Insulation Tape.

4.                   National Electrical Manufacturers Association (NEMA):

a.                   WC 5-1973 (R1985), Thermoplastic-Insulated Wire and Cable for the Transmission and Distribution of Electrical Energy.

b.                   WC7-1988, Cross-Linked-Thermosetting-Polyethylene, Insulated Wire and Cable for the Transmission and Distribution of Electrical Energy.

5.                   National Fire Protection Association (NFPA), National Electrical Code (NEC) - Latest Revision.

6.                   California Electrical Code (CEC).

7.                   Underwriters Laboratories (UL):

a.                   44-83 (R1988), Rubber-Insulated Wires and Cable.

b.                   83-1983 (R1989), Thermoplastic-Insulated Wires and Cables.

c.                   510-1986, Insulating Tape.

1.04.                      Submittals:

A.                  As specified in Division 1 and Section 16010.

1.                   Catalog Data:  Provide manufacturer's descriptive literature.

2.                   Single Submittal:  A single complete submittal is required for all products covered by this Section.

1.05.                      Quality Assurance

A.                  Field tests shall be performed as specified in paragraph 3.04 of this Section.

Part 2           PRODUCTS

2.01.                      Conductors:

A.                  General: Conductors shall be copper, Class B stranded and of the sizes indicated.  All conductors 120 volts and above shall be in raceway unless otherwise noted. Minimum power and control wire size shall be No. 12 AWG unless otherwise specified by the Owner's Representative.  All cable used on this Project shall be of the same type and conductor material.

B.                  Unless otherwise noted, conductors #6 and larger shall be XHHW insulation suitable for operation in wet or dry locations at temperatures not to exceed 75C in wet locations and 90C in dry locations. Conductors #8 and smaller shall be THHN in dry locations and THWN/THHN in wet locations. Control Cable shall be THHN.

C.                  Insulation Marking: All insulated conductors shall be identified with printing colored to contrast with the insulation color.

D.                  Color Coding: As specified in paragraph 3.03.

E.                  Special Wiring: Where special wiring is proposed by an equipment manufacturer, submit the special wiring requirements to the Owner's Representative and, if approved, provide same.  Special wire shall be the type required by the equipment manufacturer.

F.                  Other Wiring: Wire or cable not specifically shown on the Drawings or specified, but required, shall be of the type and size required for the application and as approved by the Owner's Representative.

G.                 Manufacturer: Cablec, Southwire, or approved equal.

2.02.                      Clock Cable:

A.                  Clock circuit wiring: minimum (3) #12 AWG THHN color coded red, white and black.

2.03.                      Telephone and Data Cable:

A.                  Four pair UTP/24 AWG Solid Copper rated “Category 5e.”

1.                   Capable of transmitting analog and digital voice data rates up to 155 Mbps. Cable shall meet and exceed TIA/EIA-568-A Category 5 Specifications, meet IEEE 802.5 4/16 Mbps, meet IEEE 802.3 10 Mbps CSMA/CD and exceed IEEE 802.3 10Base-T standards.

B.                  Conductor Identification: Conductors shall be pigmented “White/Blue; White/Orange; White/Green & White/Brown.”

C.                  Jacket: Plenum rated thermoplastic.

D.                  Manufacturer: West Penn WP56471 or approved equal.

2.04.                      Terminations:

A.                  Manufacturer: Terminals as manufactured by T&B, Burndy or equal.

B.                  Cable Termination for Copper: Crimp style two hole NEMA spade terminals designed and rated for copper cable.

C.                  Wire Terminations: Crimp on ring-tongue terminals, insulated sleeve, of proper size for the wire used.

D.                  End Seals: Heat shrink plastic caps of proper size for the wire on which used.

2.05.                      Tape:

A.                  Tape used for terminations and cable marking shall be compatible with the insulation and jacket of the cable and shall be of plastic material.  Tape shall conform to FS HH-I-595 and UL 510.

Part 3           EXECUTION

3.01.                      Cable Installation:

A.                  Contractor installing Category 5e and Fiberoptic cables shall be manufacturer certified to pull and install such cables.

B.                  Clean Raceways: Clean all raceways prior to installation of cables as specified in Section 16110 - Conduits Raceway and Fittings.

C.                  Cable Pulling: Exercise care in pulling wires and cables into conduit or wireways so as to avoid kinking, putting undue stress on the cables or otherwise abrading them.  No grease will be permitted in pulling cables.  Only soapstone, talc, or UL listed pulling compound will be permitted.  The raceway construction shall be complete and protected from the weather before cable is pulled into it.  Swab conduits before installing cables and exercise care in pulling, to avoid damage to conductors.

D.                  Low Voltage Cables: All low voltage wires and cables concealed in walls shall be run in EMT conduit from flush outlet boxes to above accessible ceilings.  Provide conduit where cables penetrate fire walls above ceilings.  Where low voltage cables run parallel to line voltage (over 120 volts), they shall be installed a minimum of 6 inches apart.

E.                  Bending Radius: Cable bending radius shall be per applicable code. Install feeder cables in one continuous length.

F.                  Equipment Grounding Conductors: Provide an equipment grounding conductor, whether or not it is shown on the Drawings, in any conduit or any raceway.

G.                 Panelboard Wiring: In panels, bundle incoming wire and cables which are No. 6 AWG and smaller, lace at intervals not greater than 6 inches, neatly spread into trees and connect to their respective terminals.  Allow sufficient slack in cables for alterations in terminal connections.  Perform lacing with plastic cable ties or linen lacing twine.  Where plastic panel wiring duct is provided for cable runs, lacing is not necessary when the cable is properly installed in the duct.

H.                  Wiring at Hinges: For cables crossing hinges, utilize extra flexible stranded wire, make up into groups not exceeding 12, and arrange so that they will be protected from chafing when the hinged member is moved.

I.                     All wiring and cable shall be supported from the structure above.  All wiring over 100 volts shall be installed in conduit except as noted in Section 16130.  All wiring below 100 volts shall be installed in J hooks a maximum 48 inches on center or with cable ties to the structure a maximum 48 inches on center.

3.02.                      Cable Terminations and Splices:

A.                  Splices: UL Listed wirenuts. (For line voltage only)

B.                  Terminations: Shall comply with the following:

1.                   Make up and form cable and orient terminals to minimize cable strain and stress on device being terminated on.

2.                   Burnish oxide from conductor prior to inserting in oxide breaking compound filled terminal.

3.03.                      Circuit and Conductor Identification:

A.                  Color Coding: Provide color coding for all circuit conductors.  Insulation color shall be white for neutrals and green for grounding conductors.  An isolated ground conductor shall be identified with an orange tracer in the green body.  Ungrounded conductor colors shall be as follows:

 

VOLTAGE

208/120V

 

 

 

 

Phase A

Black

 

Phase B

Red

 

Phase C

Blue

 

Neutral

White

 

Ground

Bare/Green

 

B.                  Color coding shall be in the conductor insulation for all conductors #10 AWG and smaller; for larger conductors, color shall be either in the insulation or in colored plastic tape applied at every location where the conductor is readily accessible.

C.                  Circuit Identification: All underground distribution and service circuits shall be provided with plastic identification tags in each secondary box and at each termination.  Tags shall identify the source transformer of the circuit and the building number(s) serviced by the circuit.

3.04.                      Field Tests:

A.                  The Contractor shall perform the following tests at his expense:

1.                   Continuity Test of Wire: Test each wire for continuity and accuracy of the identifying tags at both ends and at all locations marked. Submit a report to the Owner's Representative certifying the fact of the test and the accuracy of the marking.

2.                   Insulation Resistance Tests: Perform insulation resistance tests on all wire and cable installed.  Make these tests after all equipment has been connected, except that equipment which may be damaged by the test voltage shall be disconnected.  Test the insulation with a 500 Vdc insulation resistance tester with a scale reading not less than 100 megohms.  The insulation resistance shall be 2 megohms or more.  Submit results for review.

3.                   Phase Rotation: The contractor shall test and verify that the phase rotation of all new three-phase services, feeders and branch circuits matches the phase rotation of the existing circuits being replaced.  A record shall be kept of each circuit tested and, on completion, given to the Owner's Representative for review.

end of section