ESBD_File_336316_02_TWU_East Campus Utilities - Narrative.pdf

East Campus Infrastructure

IT Relocation and Ductbank Installation

Schematic Narrative

Presented to:

Texas Woman’s University Denton, Texas

September 7, 2023

Prepared By:

EEA Consulting Engineers

6615 Vaught Ranch Rd, Ste. 200

Austin, TX 78730

512-744-4400

Texas Firm Registration Number F-2497

JQ Engineering

100 Glass St

Dallas, TX 75207

512-453-0767

Texas Firm Registration Number F-1294

Datacom Design Group

9111 Jollyville Rd, Suite 290

Austin TX 78759

512-478-6001

IT RELOCATION NARRATIVE

The intent of this project is to re-route existing fiber and copper telecom wires between pull boxes

4 and 6 to avoid site utilities for future buildings. As part of this project, the contractor will be responsible for the following scope:

1) All work and material shall comply with campus standards.

2) Perform SUE to locate all existing utilities along proposed route.

3) Install new (2) new 4” conduits from PB 4 to 6 at ~30’ depth. These will follow route of existing conduit. Refer to attached plan. Boring to occur without disturbing existing utilities.

a. Each new 4” conduit shall have a 3-cell fabric innerducts installed.

b. All spare conduits and inner-ducts will have mule-tape or pull string for future use.

c. Tracer wire of 12 AWG or better.

d. All unused conduits in pull boxes will be plugged with removable watertight plugs.

4) Run temporary comms copper wire from end point at parliament village to existing emergency phones to avoid downtime. Wire shall be overhead and use contractor provided poles for the duration of downtime. Location of emergency phones to be provided via addendum.

5) Owner (TWU IT) needs to coordinate outage with affected buildings/departments.

6) Prior to disconnecting any elements, Contractor will need to confirm that all strands/terminations are in working order.

7) Owner’s IT team will disconnect the fiber patch cords.

8) Contractor will take the necessary means to protect the existing terminations.

9) Existing OSP fiber will be pulled back to the existing pullbox #4 and protected in place.

10) New communications conduit will be installed prior to disconnecting the existing fiber.

11) Existing fiber is then re-pulled/routed in new communications ductbank.

12) Re-terminate and test fiber in existing fiber shelf.

13) Patching by Owner.

14) Demo existing conduit to extent necessary to avoid damage to PB #4 and PB #6.

15) TWU shall be responsible for testing cable including terminations. In case of failure during test, contractor shall repair and pay for re-test at no additional expense to the owner.

16) Contractor shall provide as-builts to owner.

Notes / Assumptions:

1) TWU to be responsible for disconnecting and reconnecting devices at end point.

2) TWU needs temporary comms to emergency phones for duration of project via overhead lines. Temporary fiber will not be run to fieldhouse.

3) Owner (TWU IT) needs to coordinate outage with affected buildings/departments and/or provide a temporary connection/patch to keep buildings operational.

C01.00

EXISTING CONDITIONS

SHEET NUMBER

PROJECT NUMBER

SHEET TITLE

KEYPLAN

SEALS AND SIGNATURES

ISSUED FOR DATE

DATACOM DESIGN GROUP

AUDIO VISUAL - SECURITY - INFORMATION TECHNOLOGY

9111 Jollyville Rd, Suite 290 Austin, TX 78759 512.478.6001

JQ ENGINEERING

CIVIL - STRUCTURAL

100 Glass Street Dallas, TX 75207 214.752.9098

SUITE 100

Pl ot

Da te:

3333 WELBORN ST.

SUITE 100

DALLAS, TX 75219

469.232.5521

NORTH

HEALTH SCIENCE CENTER

FRAME STREET

DENTON, TX

smithgroup.com

140003

Fil e:

SCHEMATIC DESIGN 04 APR 2023

PROJECT NO:

JQ INFRASTRUCTURE, LLC

100 GLASS STREET, SUITE 201

972.392.7340

DALLAS, TEXAS 75207

TBPE FIRM 7986

shaping the built environment

Infrastructure

4220094

DESIGN DEVELOPMENT 28 JUNE 2023

EXISTING MINOR CONTOUR LINE

EXISTING MAJOR CONTOUR LINE

BUILDING

ASPHALT

OVERHEAD UTILITY LINE

CONCRETE

TOP OF CURB

GUTTER

CONCRETE SIDEWALK

CHAIN LINK FENCE

BARBED WIRE FENCE

CONTROL POINT

AC AIR CONDITIONING UNIT

BOLLARD

ELECTRIC JUNCTION BOX

ELECTRIC MANHOLE

GAS METER

GUY ANCHOR

FIRE HYDRANT

IRRIGATION CONTROL VALVE

LIGHT POLE

MAIL BOX

SANITARY SEWER MANHOLE

SIGN

STORM DRAIN MANHOLE

UTILITY POLE

WATER METER

WATER VALVE

CREPE MYRTLE

CYPRESS TREE

ELM TREE

HACKBERRY TREE

OAK TREE

PECAN TREE

FLOWLINE

ELEVATION

FL

ELEV

OUL

WROUGHT IRON FENCE

SANITARY SEWER CLEANOUT

ELECTRIC METER

MANHOLE (AS NOTED)

MONITORING WELL

CEDAR TREE

BOIS D'ARC TREE

PEAR TREE

APPROXIMATE SUBSURFACE GAS LINE

APPROXIMATE SUBSURFACE WATER LINE

APPROXIMATE SUBSURFACE SANITARY

SEWER LINE

APPROXIMATE SUBSURFACE STORM LINE

Survey Legend

N

PB #4

PB #6

IT RELOCATION PLAN

PB8

PB1

PB2

PB3

PB4

PB5

PB6

PB??

PB9

PB7

PULL BOX LOCATION REFERENCE

ELECTRICAL DUCTBANK NARRATIVE:

The intent of this project is to provide site power to future buildings. There are two sections of electrical ductbank and wire that will be installed as part of this project. One section includes running ductbank and wire from PME #85 to new PME #XX to serve HSC, and one section includes running ductbank and wire from PME #XX TO PME #136. New PME #XX to be provided by Others. Routing will follow the attached marked up plan.

1) All work and material shall comply with campus standard. Refer to attached relevant campus standards.

2) Perform SUE to locate all existing utilities along proposed route.

3) Coordinate any required outage with owner at least 2 weeks before required outage.

4) Install new electrical ductbank. For pricing assume 48” deep. Final depth shall be determined in design to be provided by TWU at a later date. Ductbank to be encased in reinforced red concrete with PVC conduits. Provide conduit charts to maintain spacing ever

4’, #3 rebar stirrups every 4 feet, compressive strength of 2,500 psi at 28 days.

5) Ductbank will be sized 3’ x 2’ with (6) 6” conduits when running in main corridors, and 2’ x

2’ with (4) 6” conduits for lateral runs. Refer to drawings for locations.

6) Ductbank shall have 3#500 MCM 15 KV feeders. These shall be routed in 6” conduit.

a. Refer to TWU standards for cable specifications.

7) Install total of (3) manholes where shown on drawings. Precast concrete, min 10’x10’x8’ interior height, wall knock outs on every wall, 18” galvanized ladder, sump and sump pump with power, grounding rods and ring, traffic rated ring and cover. Ductbank reinforcing rebar to be drilled and anchored into manhole.

8) Terminate feeders at HSC switch (PME #XX).

9) TWU shall be responsible for testing cable including terminations. In case of failure during test, contractor shall repair and pay for re-test at no additional expense to the owner.

2'x2' DUCTBANK NEW MANHOLE

NEW MANHOLE

NEW MANHOLE

(E) PME #136

(E) PME #85

3' x2

' D U

C T

B A

N K

3' x2

' D U

C T

B A

N K

2'x2' DUCTBANK 2'x2' DUCTBANK

PME #XX

ELECTRICAL DUCTBANK ROUTING

Design Criteria Division 26 - Electrical

General Information

This Division provides general information and standard design criteria for the typical medium-voltage and low-voltage electrical distribution systems presently serving most of the TWU System Member campuses, including those campuses that are in relatively early stages of development.

Note: The terms “medium-voltage” and “low-voltage” refer to the following voltage classes as defined in IEEE 141, Chapter 3: Medium-voltage includes the class of nominal system voltages equal to or greater than 1000V but less than 100,000V. Low-voltage encompasses the class of nominal system voltages less than 1000V.

Purpose & Application of this Division

NFPA 70, the National Electrical Code® (NEC®) essentially contains provisions considered necessary to safety. As explained in Article 90.1(B), compliance with the applicable codes and proper maintenance of systems will result in installations that are “free from hazard but [are] not necessarily efficient, convenient, or adequate for good service or future expansion of electrical use.”

The purpose of this division of the Facility Design Guidelines (FDG) is to provide site-specific design criteria and guidance to ensure that electrical system installations are free from hazard; are standardized, efficient, reliable, convenient, maintainable, sustainable, and adaptable for future use;

and will provide quality service over the expected life of the building(s) or facility(ies) served.

Electrical design, material, equipment, and installations shall comply with site-specific requirements of this division and the project-specific requirements identified in the “Program of Requirements” (POR). Where appropriate, guidance is provided to encourage the cost-effective implementation of site-specific requirements and certain laws and regulations mandated by federal, state, and local code agencies.

In addition to new electrical installations, the criteria of this division apply to all renovation, replacement, modification, maintenance, and rehabilitation projects for which the Texas Engineering Practice Act and the Authority Having Jurisdiction (AHJ) requires an electrical design.

Electrical Codes & Standards

Overview

Electrical design, material, equipment, and installation shall comply with the applicable portions of the latest edition of each code and standard listed below or referenced elsewhere in this chapter, in effect at the time of design contract award, unless otherwise noted in the contract.

Note: If a later edition of a code or standard is adopted by the State during the course of project design or construction it shall be TWU’s option to require that those revisions be met before project acceptance.

TWU ELECTRICAL STANDARDS

In many instances, recommendations or “best practices’ presented in building codes, electrical codes, and industry standards have been adopted as standard requirements in this division of the FDG.

If there is a conflict between codes or standards and TWU requirements in this division, contact the FMC Design Manual for assistance in resolving the conflict. If a requirement in the FDG exceeds a minimum code or standard requirements.

Where the NEC® uses terms similar to “by special permission,” obtain written permission from the FMC Project Manager.

Codes & Standards Applicable to this Division

ANSI – American National Standards Institute:

• ANSI Z535.1, Safety Colors

• ANSI Z535.2, Environmental and Facility Safety Signs

• ANSI Z535.3, Criteria for Safety Symbols

• ANSI Z535.4, Product Safety Signs and Labels

ASHRAE – American Society of Heating, Refrigeration, and Air Conditioning Engineers:

• ASHRAE Standard 90.1, Energy Standards for Buildings Except for Low Rise Residential

Buildings [ANSI, IESNA]*

ASTM – American Society for Testing and Materials

CBM – Certified Ballast Manufacturers

ICC – International Code Council

• International Building Code® (IBC)

• International Existing Building Code® (IEBC)

ICEA – Insulated Cable Engineers Association

• ICEA S-93-639, Shielded Power Cables 5-46kV (NEMA WC-74)

IEEE® – Institute of Electronics and Electrical Engineers:

• IEEE C2™, National Electrical Safety Code (NESC) [ANSI]

• IEEE Std 141™, Recommended Practice for Electric Power Distribution for Industrial

Plants (“Red Book”)

• IEEE Std 142™, Recommended Practice for Grounding of Industrial and Commercial

Power Systems (“Green Book”)

• IEEE Std 241™, Recommended Practice for Electric Power Systems in Commercial

Buildings (“Gray Book”)

• IEEE Std 242™, Recommended Practice for Protection and Coordination of Industrial and

Commercial Power Systems (“Buff Book”)

• IEEE Std 315™, Graphic Symbols for Electrical and Electronics Diagrams

• IEEE Std 399™, Recommended Practice for Power Systems Analysis (“Brown Book”)

• IEEE Std 446™, Recommended Practice for Emergency and Standby Power Systems for

Industrial and Commercial Applications (“Orange Book”)

• IEEE Std 493™, Recommended Practice for the Design of Reliable Industrial and

• Commercial Power Systems (“Gold Book”)

• IEEE Std 519™, Recommended Practices and Requirements for Harmonic Control in

Electrical Power Systems

• IEEE Std 739™, Recommended Practice for Energy Management in Industrial and

Commercial Facilities (“Bronze Book”).

• IEEE Std 902™, Guide for Maintenance, Operation, and Safety of Industrial and

Commercial Power Systems (“Yellow Book”)

• IEEE Std 1015™, Recommended Practice Applying Low-Voltage Circuit Breakers

Used in Industrial and Commercial Power Systems (“Blue Book”)

• IEEE Std 1100™, Recommended Practice for Powering and Grounding Electronic

Equipment (“Emerald Book”)

• IEEE Std 1584™, Guide for Performing Arc-Flash Hazard Calculations

IESNA – Illuminating Engineering Society of North America:

• IESNA Lighting Handbook, Ninth Edition

• IESNA RP-1, American National Standard Practice for Office Lighting

• IESNA RP-7, American National Standard Practice for Lighting Industrial Facilities

NECA – National Electrical Contractors Association:

• NECA 1, Good Workmanship in Electrical Construction [ANSI]

• NECA 90, Recommended Practice for Commissioning Building Electrical Systems

[ANSI]

• NECA 100, Symbols for Electrical Construction Drawings [ANSI]

• NECA 101, Standard for Installing Steel Conduits (Rigid, IMC, EMT) [ANSI]

• NECA 104, Recommended Practice for Installing Aluminum Building Wire and Cable

[ANSI]

• NECA / NEMA 105, Recommended Practice for Installing Metal Cable Tray Systems

[ANSI]

• NECA 111, Standard for Installing Nonmetallic Raceways (RNC, ENT, LFNC)

[ANSI]

• NECA / NACNA 120, Standard for Installing Armored Cable (Type AC) and Metal- Clad

Cable (Type MC) [ANSI]

• NECA 202, Recommended Practice for Installing and Maintaining Industrial Heat

Tracing Systems [ANSI]

• NECA 230, Standard for Selecting, Installing and Maintaining Electric Motors and

Motor Controllers [ANSI]

• NECA 331, Standard for Building and Service Entrance Grounding and Bonding

• NECA 400, Standard for Installing and Maintaining Switchboards [ANSI]

• NECA 402, Standard for Installing and Maintaining Motor Control Centers [ANSI]

• NECA / EGSA 404, Standard for Installing Generator Sets [ANSI]

• NECA 407, Recommended Practice for Installing and Maintaining Panelboards

[ANSI]

• NECA 408, Recommended Practice for Installing and Maintaining Busways [ANSI]

• NECA 409, Recommended Practice for Installing and Maintaining Dry-Type Transformers [ANSI]

• NECA 410, Recommended Practice for Installing and Maintaining Liquid-Filled Transformers [ANSI]

• NECA 411, Recommended Practice for Installing and Maintaining Uninterruptible Power Supplies (UPS) [ANSI]

• NECA 420, Standard for Fuse Applications [ANSI]

• NECA 430, Standard for Installing Medium-Voltage Metal-Clad Switchgear [ANSI]

• NECA / IESNA 500, Recommended Practice for Installing Indoor Lighting Systems

[ANSI]

• NECA / IESNA 501, Recommended Practice for Installing Exterior Lighting Systems

[ANSI]

• NECA / IESNA 502, Recommended Practice for Installing Industrial Lighting

Systems [ANSI]

• NECA / MACSCB 600, Recommended Practice for Installing and Maintaining

Medium-Voltage Cable [ANSI]

• NECA / NEMA 605, Installing Underground Nonmetallic Utility Duct [ANSI] NEMA National

Electrical Manufacturers Association

NETA – International Electrical Testing Association, Inc.:

• NETA ATS, Acceptance Testing Specifications for Electrical Power Distribution Equipment and Systems

• NETA MTS, Maintenance Testing Specifications for Electrical Power Distribution Equipment and Systems

• NETA ETT, Standard for Certification of Electrical Testing Technicians [ANSI] NFPA

National Fire Protection Association:

• NFPA 20®, Standard for the Installation of Stationary Pumps for Fire Protection®

• NFPA 70TM, National Electrical Code® (NEC®)

• NFPA 70E, Standard for Electrical Safety in the Workplace

• NFPA 101®, Life Safety Code®

• NFPA 110, Standard for Emergency and Standby Power Systems

• NFPA 111, Standard on Stored Electrical Energy Emergency and Standby Power

Systems

• NFPA 780, Standard for the Installation of Lightning Protection Systems

• All other NFPA codes and standards except NFPA 5000

OSHA – Occupational Safety and Health Administration

IECC – International Energy Conservation Code

ISO – International Organization for Standardization

Texas State Energy Conservation Code

*Note: Codes and standards that have been adopted by other publishers are indentified by their acronym in a [bracket] at the end of the listing above.

Fundamental System Requirements

Adequacy & Future Expansion

Provide electrical systems with adequate capacity for the initial known requirements plus provisions for future expansion of the system as follows:

1. For new facilities with an expected facility service life of 30 years or more, design for a future load growth (FLG) of 1% over of the initial design load per year of expected facility service life, but not exceeding 30%. Refer to IEEE Std. 141-1993, paragraph 2.4.1.4.

2. For new facilities with less than 20 years of expected service life, an FLG of less than 20% may be assumed for design purposes.

3. For service renovations to existing facilities, design electrical systems with the FLG based on 1% per year of expected remaining service life of the renovated facility.

Fault Current Capacity

Provide electrical equipment with bus bracing and device interrupting capacities that exceed the fault current available at the terminals.

Facility Lightning Protection

Provide systems protected from the effects of direct or nearby lightning discharges in accordance with NFPA 780, IEEE Std 1100, and the IEEE C62, Surge Protection Standards Collection.

Power Quality

Design power systems in accordance with the recommended design practices in IEEE Std 1100™ and IEEE Std 141™ related to power quality.

In addition, provide electrical systems that are selected and configured to provide adequate power quality for the satisfactory operation of electrical utilization equipment according to the following guidance:

• Specify the highest practical service, distribution, and utilization voltages appropriate for the load(s) served.

• Serve “high-impact” electrical loads such as HVAC equipment, elevators, and process loads from different feeder sources that serve sensitive loads such as electronic equipment, computers, and instrumentation.

• Locate step-down transformers and the associated panelboards as physically close as practicable to the loads served by that equipment. This rule applies to the utility medium-voltage transformer(s) serving the building as well as the low-voltage transformers supplying smaller loads distributed throughout the building.

• Balance the loads on each low-voltage feeder so that the voltage on each phase is within +/- 1.0% of the average voltage of the three phases. Refer to the DOE Office of Industrial Technologies, “Motor Tip Sheet #7” dated September 2005 available for download to PDF format at no charge at:

http://www1.eere.energy.gov/industry/bestpractices/pdfs/eliminate_voltage_un balanced_motor_systemts7.pdf.

Power System Harmonic Limits

Limit harmonic currents at the point of service for each building to comply with IEEE Std 519™.

IEEE Std. 141-1993™, Chapter 9 refers to IEEE Std 519™ for limits on the harmonic currents that a user can induce back into the utility power system.

Power System Reliability

Design power systems in compliance with IEEE 493™ to ensure that systems and equipment deemed to be essential to life safety and critical to facility operations are supplied with power at a high degree of reliability and continuity.

IEEE 493™ provides proven methods of quantitative reliability analysis as it applies to the practical planning and design of cost-effective electric power distribution systems.

Consider the need for multiple transformer-switchgear service equipment to ensure power supply continuity within the facility during scheduled or emergency equipment outages.

Overcurrent Protection

Provide fully selectively coordinated overcurrent protection.

If ground-fault protection is required for the service or feeder disconnecting means in accordance with the NEC®, extend ground-fault protection for the feeders and/or branch- circuits originating from the main service equipment bus immediately downstream of the service disconnecting means.

Standards for Material & Equipment

Use electrical materials and equipment that is constructed and tested in accordance with the standards of NEMA, ANSI, ASTM, or other recognized commercial standard.

If material and equipment is labeled, listed, or recognized by any Nationally-Recognized Testing Laboratory (NRTL) acceptable to the Occupational Safety and Health Administration (OSHA) and the TWU AHJ, then provide NRTL-labeled, -listed, or - recognized material and equipment. Acceptable NRTLs include but are not limited to:

• Underwriters Laboratories, Inc. (UL)

• Factory Mutual Research Corp. (FMRC) (also referred to as “Factory Mutual Global,”or “FM

Global”)

• Intertek Testing Services NA, Inc. (ITSNA, formerly ETL)

• Canadian Standards Association (CSA)

A complete listing of acceptable NRTLs is published on the OSHA website at http://www.osha.gov/dts/otpca/nrtl/.

Where material and equipment is not labeled, listed, or recognized by any NRTL, provide a manufacturer’s Certificate of Compliance indicating complete compliance of each item with applicable standards of NEMA, ANSI, ASTM, or other recognized commercial standard.

Do not install or use electrical material or equipment for any use other than that for which it was designed, labeled, listed, or identified unless formally approved for such use by TWU AHJ. This National Electrical Code® requirement is re-stated for emphasis.

Personnel Safety

Design systems and select equipment to minimize or eliminate the risks of electrocution, arc-flash, and arc-blast hazards to maintenance and operations personnel. Refer to NFPA 70E, Article 130.1.

Equipment and design practices are available to minimize energy levels and the number of at-risk procedures that require an employee to be exposed to high energy level electrical sources. Proven designs to reduce the hazards of electrical systems include:

• Arc-resistant switchgear, motor control centers, and other compartmentalized equipment.

• Remote racking systems for the installation and removal of large/heavy circuit breakers.

• Remote opening and closing of switching devices.

• Higher impedance transformers and current-limiting reactors.

• Insulated or isolated busses in switchboards and switchgear assemblies.

Locating Electrical Equipment

Locate electrical equipment so it will be accessible for inspection, service, repair, and replacement without removing permanent construction, with working clearance and dedicated space as required by the NEC® and as recommended by the manufacturer.

Locate equipment so generator exhaust does not enter occupied spaces through outside air intakes.

Identifying Electrical Equipment

Overview

Provide the following types of identification on all electrical equipment as required by TWU standards, the NEC®, and NFPA 70E:

• Arc-flash and shock hazard-warning labels

• Component identification

• Equipment nameplates

• Diagrams and Operating Instructions

• Emergency System Equipment Identification

• Warning Signs, Markers, & Device Labels http://www.osha.gov/dts/otpca/nrtl/

Arc-Flash & Shock-Hazard Warning Labels

Install arc-flash and shock hazard-warning labels that comply with ANSI Z535.4 on switchgear, switchboards, transformers, motor control centers, panelboards, motor controllers, safety switches, industrial control panels, and other electrical equipment that is likely to require examination, adjustment, servicing, or maintenance while energized.

Locate the marking to be clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment.

Note: Refer to Section 110.16 in the NEC®.

On renovation projects, install arc-flash warning labels on existing equipment where lock-out/tag-out will be required for the renovation work.

Note: Refer to NFPA 70-E, Articles 120 and 130.

Provide the information listed below on each label. Specify that arc-flash warning label information be produced by the electrical equipment manufacturer or supplier as a part of the final power system studies to be submitted by the Contractor in accordance with the electrical acceptance testing.

Note: In addition to the final arc-flash analysis, the final power system studies include load flow and fault-current calculations, and an overcurrent protective device (OCPD) coordination study based on the actual equipment to be installed for the project.

Information to be determined and applied to electrical equipment:

• Arc-Flash Protection Boundary

• Arc-flash incident energy calculated in accordance with IEEE Std 1584a™

• Working distance calculated in accordance with IEEE Std 1584a™

• NFPA 70E Hazard / Risk Category Number or the appropriate personal protective equipment (PPE) for operations with doors closed and covers on.

Note: Typical operations include operating circuit breakers, fused switches, and meter selector switches.

• System phase-to-phase voltage

• Condition(s) when a shock hazard exists (e.g. “With cover off”)

• Limited Approach Boundary as determined from NFPA 70E, Table 130.2(C)

• Restricted Approach Boundary as determined from NFPA 70E, Table130.2(C)

• Prohibited Approach Boundary as determined from NFPA 70E, Table 130.2(C)

• Unique equipment designation or code (described under “Component Identification” below)

• Class for insulating gloves based on system voltage (e.g., Class 00 up to 500V)

• Voltage rating for insulated or insulating tools based on system voltage (e.g., 1000V)

• Date that the hazard analysis was performed.

• “Served from” circuit directory information including the serving equipment designation, location (e.g., room number), circuit number, and circuit voltage / number of phases / number of wires.

• If applicable, the “serves” circuit directory information including the served equipment designation, location (e.g., room number), circuit number, and circuit voltage / number of phases / number of wires.

An abbreviated warning label may be used where it has been determined that no dangerous arc-flash hazard exists in accordance with IEEE 1584a™, paragraph 9.3.2.

Use a “DANGER” label where the calculated arc-flash incident energy exceeds 40 cal/cm.

Component Identification

Unique Equipment Designation – Identify electrical equipment on the drawings and on the equipment by assigning a unique alphanumeric code that identifies the equipment by:

• Function/System – e.g., “P” for a normal power panelboard and “EP” for an emergency power panelboard),

• Distribution System Operating Voltage - e.g., “H” for 480/277V and “L” for 208/120V.

• Location – e.g., “2nd floor” or “Electrical Room 211.”

Equipment Nameplates

Install electrical equipment nameplates containing the following three types of information:

• Type A – Circuit Directory Information: Provide circuit number; equipment served or served from; location of equipment served or served from; voltage/number of phases/ number of wires.

• Type B – General or Operational Information: Basic instructions or specific operating procedures such as special switching procedures for a load transfer scheme. These nameplates may be omitted from equipment that contains arc-flash and shock- hazard warning labeling with the required circuit directory information.

• Type C – Emergency Operations: Information concerning emergency shutdown procedures for foom, equipment and building isolation in the event of fire or other emergency.

Diagrams and Operating Instructions

Post and maintain diagrams, operating instructions and emergency procedures for electrical systems and major equipment. The documents should consist of simplified instructions, procedures, and diagrams of equipment, controls and operation of systems for selector switches, main-tie-main transfers, ATS-bypass, UPS-bypass, etc. Post and maintain an up-to-date one-line diagram of the electrical system adjacent to the service- entrance equipment.

Emergency System Equipment Identification

Install markers to identify emergency system transfer switches, generators, switchgear, transformers, motor control centers, panelboards, starters, safety switches, pull boxes, and cabinets as components of the emergency system.

Warning Signs, Markers, & Device Labels

• Install warning signs that conform to ANSI Z535.2 and meet the intent of the OSHA and NEC® danger and caution specifications on electrical equipment containing hazardous voltages (e.g.

switchgear, switchboards, transformers, motor control centers, panelboards, starters, safety switches, busways, pull boxes, and cabinets).

• Install voltage markers on electrical equipment (e.g. switchgear, transformers, motor control centers, panelboards, starters, safety switches, pull boxes, cabinets, etc.).

• Install wire markers on power, control, instrumentation, fire alarm, communications circuit wires.

• Install labels on receptacle outlets and light switches indicating circuit number, panelboard, and voltage.

Electrical Demolition

Remove abandoned electrical distribution equipment, utilization equipment, outlets, and the accessible portions of wiring, raceway systems, and cables back to the source panelboard, switchboard, switchgear, communications closet, or cabinet. Abandoned wiring and raceways can result from actions that include:

• Equipment is removed or relocated.

• Fixtures are removed or relocated.

• System is no longer used.

• There is no demonstrable near term future use for the existing circuit or raceway system.

Leave abandoned electrical equipment, conductors, and material in place only if one or more of the following conditions exist:

• The removal requires the demolition of other structures, finishes, or equipment that is still in use. An example is abandoned conduit above an existing plaster ceiling.

• Removal is not feasible due to hazards, construction methods, or restricted access.

• Removal of abandoned conductors may damage conductors that must remain operational.

Remove conduits, including those above accessible ceilings, to the point that building construction, earth, or paving covers them. Cut conduit beneath or flush with building construction or paving. Plug, cap, or seal the remaining unused conduits. Install blank covers for abandoned boxes and enclosures not removed. Extend existing equipment connections using materials and methods compatible with the existing electrical installation and this division.

Restore the original fire rating of floors, walls, and ceilings after electrical demolition. Use approved lock-out/tag-out procedures to control hazardous energy sources. Assure that an electrically safe work condition exists in the demolition area before beginning demolition. Where possible, disconnect the building from all sources of electrical power before beginning demolition.

Electrical Acceptance Testing

Perform electrical acceptance testing and inspections in accordance with the current edition of the International Electrical Testing Association (NETA), Acceptance Testing Specification (ATS).

Perform acceptance testing, inspection, function tests, and calibration to assure that installed electrical systems and components, both Contractor and User-supplied, are:

• Installed in accordance with design documents and manufacturer’s instructions.

• Tested &inspected in accordance with applicable codes &standards (e.g. NFPA 110 and

NFPA 111).

• Ready to be energized.

• Operational within industry and manufacturer’s tolerances.

Medium-Voltage Electrical Service & Distribution System

The medium-voltage electrical service and distribution system that serves each TWU System- Member campus is operated as an electric utility system in the manner by which power is distributed and utilized at the point of delivery. The operating characteristics, grounding, load connections, utilization voltages, and short-circuit current available at the point of service vary from campus to campus, as does the primary service provider, depending on if the campus owns and operates the system or a loaned and operated by a local utility company. This information is summarized in the following table:

Facility Design Guidelines Section 26 Page 12

Texas Woman’s University System-Member Campuses

System Characteristics

D en to n

D al la s

H ou st on

Distribution Nominal Voltage SV2 SV2 SV2

Grounding SG! SG1 SG1 Load Connections ¨ Y ¨ Y ¨ Y Short-Circuit Current System Configuration EU1 EU2 EU2 Elec. Utility Co. / Provider EU1 EU2 Elec. Utility Co. F&I Equip. No No No

Utilization Central Plant Chillers UV1 N/A N/A

Motors 500 HP & Larger Other Large Loads Grounding LRG

1. Some of the fields remain incomplete at this time. These will be completed with the next issue of the FDG.

2. Refer to the next page for a table that defines the various alphanumeric codes in the fields above.

Codes for Electric Utility Distribution & Utilization System Characteristics Item / Category

Code

Information / Description Distributio n System Nominal

SV1 12.47 kV, 3-phase, 3-wire, delta / ungrounded wye, 60Hz SV2 12.47 kV, 3-phase, 4-wire, delta / solidly-grounded wye, 60Hz SV3 12.47 kV, 3-phase, 4-wire, delta / low-resistance-grounded wye, 60Hz

Voltage The ungrounded (neutral) conductor is grounded through a low-impedance resistor to limit the current in the event of a ground fault.

SV4 13.2 kV, 3-phase, 3-wire, delta / ungrounded wye, 60 Hz

Voltage

System Grounding

SV5 13.2 kV, 3-phase, 4-wire, delta / solidly-grounded wye, 60 Hz

4.16 kV, 3-phase, 4-wire, delta / 2.4 kV, 3W, 60Hz

SG1 Solidly-grounded wye

SG2 Primary: TBD Secondary: TBD n System Grounding

SG3 Primary: TBD Secondary: TBD LRG Low-resistance-grounded wye

LC1 TBD

LC2 TBD

Distributio n System Load Connections

LC3 TBD

LC4 TBD

LC5 TBD

SC1 TBD

SC2 TBD

Facility Design

Short-Circuit Current

SC3 TBD

SC4

SC5

Configuratio

EU1 Denton Municipal Electric

EU2

Electric Utility Company / Provider Electric

Comp

EU3

EU4

EU5

EU6

EU7

EU8

Electric

Comp F&I Equipmen

UV1 12.47 kV / L-L & 4.16Y / 2.4 kV, 3W, 60 Hz UV2 4160 / 2.4 kV, 3W

UV3

Utilization

Central Plant Chillers

UV4

UV5

Design Guidance

• Select an optimum standard medium-voltage utilization system level for large loads that results in the highest operational efficiency and the least life-cycle cost.

• Serve large loads at one of two standard medium-voltage utilization system levels.

• Confirm the available short-circuit current at the point of service or connection to the existing utility source with TWU’s local electric power provider.

Note: For projects that require one or more medium-voltage transformers to supply low-voltage power to a building or facility, it is generally acceptable to assume for design purposes, in the calculation of maximum short-circuit current, that the utility source has an infinite bus impedance relative to the secondary windings of each medium-voltage transformer supplied from it. Refer to IEEE 242, Section 2.7 for additional information and guidance on the calculation of short-circuit values.

System Description

Medium-voltage distribution circuits in the well-developed areas of a campus generally consist of multiple single-conductor insulated copper conductors routed in a multi-duct underground ductbank/manhole system with radial and looped circuits switched manually via sectionalizing switchgear.

The switchgear supply power from the campus utility distribution system “grid” to the primary windings of one or more medium-voltage transformers located within the project site through an extension of the underground ductbank/manhole system. Major loads in such areas may have dedicated radial feeders from utility substations.

Distribution circuits in less developed areas typically provide electrical services to individual buildings and other permanent structures radially from aerial conductors; however, the installation of permanent overhead distribution is not permitted for new construction.

The portion of the utility distribution system supplying a typical TWU project originates at the point of service or connection to the existing utility supply line via switchgear and terminates at the primary windings of the medium- voltage transformer(s) that serve(s) the project load at a lower utilization voltage.

The load for a TWU project typically consists of a single building or facility located on a well-defined project site. Each building is served from the campus primary distribution system through one outdoor sectionalizing switchgear containing two switched mains and one or two switched feeder taps.

The main or incoming feeder is “looped” through the pair of switched mains, thereby providing continuity of the main feeder as well as the option to isolate a portion of it.

Depending on the magnitude of the load and the level of reliable normal power required for the project, one or both of the switched feeder taps in the switchgear may be used to supply the building or buildings from one or two service transformers.

Smaller buildings that do not require more than an average level of service reliability are usually served by a single transformer via one radial feeder from the switchgear, in which case the other switch may be reserved as a spare to supply temporary backup power to the building.

Buildings that require two service transformers, either because of a high demand load and/or a requirement for a high level of service reliability, are most often served by two radial feeders that each emanate from one of the two switched taps contained within the same switchgear and are terminated at the primary bushings of each transformer.

Additional alternatives for supplying one or more buildings from the utility distribution system are possible because TWU standards require that all medium-voltage transformers be provided with loop/dual-feed primary bushings. Refer to the heading “Medium-Voltage Transformers” for additional information.

Unless noted otherwise in the project-specific Program of Requirements (POR), any modifications necessary to extend or upgrade the campus utility distribution system to supply electrical service to a new project or project site must be fully funded by that project. Therefore, all utility distribution system components including cables, ductbanks, manholes, switchgear, service transformers, equipment pads, and similar construction items necessary to support or contain utility system components must be furnished and installed by the Construction Contractor selected for each project.

Location & Routing of Primary Distribution

Determine the maximum demand load for the project as soon as possible during the design phase so that TWU may determine which utility distribution system circuit(s) is (are) most suitable to supply the project and identify the physical point(s) of connection to it, e.g., the existing manhole(s) and switch(es) that may be used, and any modifications of the campus medium-voltage infrastructure that would be required for inclusion in the project scope of work.

Determine the routing of ductbanks and the locations of manholes, medium-voltage transformers, electricity meters, emergency/standby generators, and other outdoor electrical equipment during the Design Development phase.

Coordinate the placement of proposed underground ductbanks and manholes with the Project Civil Engineer.

Provide sufficient horizontal and vertical separation from other underground utilities. The minimum outside-to-outside surface clearance between medium-voltage ductbanks and other utilities is 12 inches for vertical crossings and 12 inches for parallel runs.

Provide at least 20 feet of separation between exterior building foundations and the outside walls of existing in-use and new medium-voltage electrical manholes and ductbanks.

Note: Where a proposed building cannot satisfactorily be placed within the project site boundary without compromising the minimum 20-ft. separation from an existing in-use medium-voltage manhole or ductbank, the project shall relocate the existing infrastructure accordingly.

Abandoned manholes and ductbanks not scheduled for future use are excluded from this requirement.

Following are additional considerations and requirements for the physical arrangement of outdoor medium-voltage electrical equipment:

• Coordinate the locations of proposed outdoor electrical equipment with the TWU Project

Manager.

• Minimize any adverse visual effects of equipment on architectural and landscaping features.

• Minimize audible effects associated with the operation of transformers and generators.

• Provide adequate and required access to equipment for the safe inspection, maintenance, and operation by personnel, and to allow for its proper installation and removal without the need to remove, relocate, or disassemble other permanent equipment installations or structures in the area.

Note: Later sections of this Division present guidance and special requirements for working space and dedicated equipment space in the sections that address specific medium-voltage equipment. For example, special requirements apply to the proper location, operation, and maintenance of medium-voltage transformers, depending on the type used and whether they are installed indoors or outdoors. These requirements are described under the heading “Medium-Voltage Transformers” below.

Medium-Voltage Cable

Shielded MV105 Cable

Provide medium-voltage shielded power cables that are NTRL-listed as Type MV105 for use in raceways, trays, underground ductbanks, manholes, vaults, and within switchgear and equipment of sufficient interior dimensions to allow for the proper bending & and termination of shielded cables.

Comply with the NEC®, IEEE C2™, ICEA S-93-639 / NEMA WC-74, and UL 1072.

Select voltage ratings for power cables and terminations based on the operating voltage of the medium-voltage distribution system as follows:

Distribution System Operating Voltage Power Cable Nominal Voltage Rating

4,160 volts 5kV 5,000 volts to 15,000 volts 15kV

25,000 volts 25kV 35,000 volts 35kV

Specification

• Conductor: Single uncoated annealed copper conductor with Class B stranding.

• Strand Screen: Extruded semi-conducting ethylene-propylene rubber (EPR).

• Insulation: 133% EPR 140 mils thick for 5kV & 220 mils for 15kV.

• Insulation Screen: Extruded semi-conducting EPR.

• Shielding: Copper tape 5 mils thick helically applied with a minimum of 12.5% overlap.

• Jacket: Chlorosulfonated polyethylene (Hypalon), 80 mils thick.

• Continuous Operating Temperature: 90°C

Note: Operating temperature is limited to 90°C because PVC power ducts are listed for 90°C conductors.

x Emergency Temperature Rating: 105°C x Short-Circuit Rating: 250°C x Conductor Sizes (for 15kV only): AWG Nos. 1, 1/0, 4/0, & 500kcmil. Non-

Shielded MV105 Power Cable

Use non-shielded medium-voltage power cables only for short jumpers within switchgear or transformer enclosures where it is not feasible to install shielded cables due to inadequate space for bending or terminating shielded cables.

Use non-shielded medium-voltage transformer cable with 133% EPR / 140 mils thick for 5kV and 133% EPR / 220 mils thick for 15kV insulation, chlorosulfonated polyethylene (Hypalon) jacket.

Conductor AWG Sizes (for 15kV only): 1, 1/0, 4/0, & 500kcmil.

Obtain approval from TWU for each installation of non-shielded medium-voltage cable.

Acceptable Manufacturers

• General Cable

• Kerite

• Okonite

• Pirelli

Medium-Voltage Cable Terminations

Terminating materials must be compatible with the cable supplied.

Submit proof of the acceptability by the cable manufacturer of any splicing or terminating materials.

Separable Insulated Connectors: Specify pre-molded EPDM-type, submersible, fully shielded, separable insulated connectors for use with MV105 power cable as specified above. Connector system components shall comply with IEEE Std 386TM, Separable Insulated Connector Systems for Power Distribution Systems Above 600V.

Match voltage-class ratings of cable at 5kV, 15kV, or 25kV voltage-class. Provide 200A- rated load break elbow connectors for outdoor terminations at medium-voltage transformers and switchgear with switch-ways rated at 200A continuous, and 600A-rated dead break elbow connectors for terminations at medium-voltage switchgear with switch-ways rated at 600A continuous.

Indoor Terminators: Silicone rubber, cold shrink, tubular or skirted. Outdoor

Terminator: Silicone rubber, cold shrink, skirted.

Acceptable Manufacturers:

• Elastimold

• RTE

• 3M

Medium-Voltage Cable Testing

Upon completion of the installation, TWU shall secure and pay for the services of a qualified, independent testing firm to conduct a test of all medium-voltage cable, including terminations, as part of the electrical acceptance test project phase.

The testing firm shall perform a high-potential proof test using a non-destructible DC testing device such as a “Kenotron” Westinghouse “High-Pot Tester”, or approved equal, capable of generating approximately 100,000 VDC under normal leakage conditions of acceptable cable.

All cables shall be tested in place with all splices and pothead terminations made up but not connected to switchgear or any other equipment, load device, or dead-end seal. Cables with dead-end seals shall be temporarily opened and then re-sealed.

In case of failure during the test, the Contractor shall locate the faulty splice, termination, or cable section and notify TWU before making any repairs.

The testing firm shall submit to the Project A/E five copies of all test reports for review by the Engineer-of-Record. Should the test reports indicate, in the opinion of TWU, that the condition of the new cable is unsatisfactory, the Contractor shall make all repairs and/or replacements to the satisfaction of and no additional cost to TWU.

Additional tests using the same testing firm shall also be made at the Contractor’s expense on all repaired sections.

TWU will not accept any cable installations until satisfactory certified proof test reports are obtained.

Raceway Systems for Medium-Voltage Cables

Design Guidance

Perform calculations to determine pulling tensions and sidewall pressures for all duct or conduit runs of medium-voltage power cable.

Design raceway systems so that the calculated pulling tensions and sidewall pressures will not exceed the cable manufacturer’s recommendations.

Lacking manufacturer’s recommendations, use the following maximum values: Cable tension:

• 0.008 lb./cmil for up to 3 conductors, not to exceed 10,000 pounds.

• 0.0064 lb./cmil for more than 3 conductors, not to exceed 10,000 pounds.

• 1000 lbs. per basket grip.

• Sidewall pressure: 500lbs./ft

The maximum length of raceways between cable pulling points shall be the lesser of 400 feet or a maximum of 90° in total horizontal bends between cable pulling points.

Aboveground Installations

Within the perimeter of buildings, install aboveground medium-voltage cables in rigid metal conduit.

In areas protected with fire sprinklers, terminate conduits entering equipment enclosures from above with water sealing fittings.

Install voltage markers on all conduits containing medium-voltage cables.

Medium-Voltage Switchgear

Indoor Medium-Voltage Switchgear

For facility-level medium-voltage switchgear lineups and unit substation switchgear, provide metal-enclosed interrupter switchgear conforming to IEEE C37.20.3, Standard for Metal-Enclosed Switchgear, with current-limiting E-rated power fuses conforming to IEEE C37.46, Standard Specifications for Power Fuses and Fuse Disconnecting Switches.

For facility-level medium-voltage switchgear applications that either exceed the current capacity of fused equipment or require complex or high-speed switching operations, use metal-clad switchgear with vacuum circuit breakers conforming to:

• IEEE C37.20.2, Standard for Metal-Clad and Station-Type Cubicle Switchgear

• IEEE C37.04, Standard Rating Structure for AC High-Voltage Circuit Breakers Rated on a

Symmetrical Current Basis

• ANSI C37.06, Standard for Switchgear – AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis – Preferred Ratings and Related Required Capabilities

• IEEE C37.09, Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a

Symmetrical Current Basis

Provide 5kV medium-voltage switchgear having the following minimum ratings:

• 60Hz one-minute withstand voltage at mean sea level: 22kV; this rating may be obtained through insulation coordination with surge arresters.

• BIL at mean sea level: 75kV; this rating may be obtained through insulation coordination with surge arresters.

• Short-circuit rating: Greater than the available short-circuit current.

Provide 15kV-class medium-voltage switchgear with the following minimum ratings:

• 60Hz one-minute withstand voltage: 42kV at mean sea level; this rating may be obtained through insulation coordination with surge arresters.

• BIL at mean sea level: 95kV; this rating may be obtained through insulation coordination with surge arresters.

• Short-circuit rating: Provide equipment with a short-circuit rating greater than the available short-circuit current and not less than 25kA RMS symmetrical.

Provide intermediate-class, metal-oxide surge arresters in 15kV-class medium-voltage switchgear conforming to IEEE Std C62.11, Standard for Metal-Oxide Surge Arresters for Alternating-Current Power Circuits. Apply arresters in accordance with IEEE Std C62.22-1991, Guide for the Application of Metal-Oxide Surge Arresters for Alternating- Current Systems or as recommended by the arrester manufacturer.

Outdoor Medium-Voltage Switchgear

Pad Mount Switches

Description

• For purposes of this Section, “padmount switches” are understood to consist of a single self-supporting enclosure containing interrupter switches.

• Padmount switches are restricted to outdoor use. A padmount switch may include power fuses and accessory compartments.

• Padmount switches shall be manufactured in accordance with IEEE C37.74.

Application

• Padmount switches are typically used for sectionalizing applications in the medium- voltage distribution system.

Note: Within the limitations of their current-carrying capability, interrupting duty and available configurations, padmount switches typically offer the lowest-cost switching solution.

Because of the relatively limited short-circuit capacity of padmount switchgear, available fault current at the proposed switch location must be carefully considered.

Installation

• Install padmount switches atop or immediately adjacent to manholes.

• Route cables to padmount switches through manholes.

• Design a foundation for a padmount switch.

Clearances

• Design installations of padmount switches to permit maintenance access.