SECTION: 33 71 01.00 40 OVERHEAD TRANSMISSION AND DISTRIBUTION

 

 READ FIRST - All JBLM utility distribution system work must be coordinated through the ESD Utilities Branch upon the start of project scoping.

 

1. As of 1 July 2019, City Light and Power (CLP) is now responsible for JBLM's Electrical Distribution system and hereby known as the electrical system owners.  The system point of demarcations are the primary power lines while the secondary lines will remain with the DPW shops.  For overhead transmission and distribution lines, the point of demarcation is located at the connection of the facility weather head.  DPW keeps ownership of the weather head.  The primary distribution system includes JBLM-Main, McChord Field, North, and all associated areas.  Excluded areas include Yakima Training Center and JBLM areas not geographically located near JBLM-Main.

 

2. The electrical utility privatization contract, SP0600-18-C-8327, was awarded through the Defense Logistics Agency (DLA) and is being administered by Directorate of Public Works, Engineering Services Division, Utilities Branch.  For contract questions, concerns, or interpretations Government points of contact include the Contracting Officer Representative (COR), Mr. Francisco de la Torre 253-967-3750, Franciso.j.delatorrejr.civ@mail.mil and Utilities Branch Chief, Ms. Royanna Solis 253-966-3282, Royanna.e.solis.civ@mail.mil

 

3.  Per DA Memo dated April 24, 2018, all utility system infrastructure improvements and additions associated with privatized utility systems are to be accomplished through use of the cognizant Utilities Privatization System Owner, unless an exception has been granted.  The utility system owner is responsible for design and connection to the distribution system

 

4.   Per the privatization contract, CLP is responsible for design, construction, and connection to the JBLM electrical distribution system.  As each project begins, the project manager shall refer to the Service Connection Manual and submit a Service Connection Application to begin the process of coordination.  The JBLM Service Connection Manual is provided here along with the Service Connection Application that must be filled out for each project that connects or effects the electrical distribution system. 

 

5.  CLP's Construction standards are to be used for all project associated with the privatized utility systems.  These standards are provided for information to A-E's and project managers. 

The UFGS Section 33 71 01 will not be used for CLP design and construction.

 

 

Criteria

  1. Quality Assurance: EP415-1-261, Volume 4
  2. UFGS SECTION 33 71 01  OVERHEAD TRANSMISSION AND DISTRIBUTION 
  3. IEEE C2 National Electrical Safety Code
  4. UFC 3-550-01, EXTERIOR ELECTRICAL POWER DISTRIBUTION
  5. Farm Security and Rural Investment Act of 2002, Section 9002
  6. Federal Sustainable Acquisition Items/Requirements
  7. Executive Order 13834
  8. DoD Green Procurement Policy (Aug 27 2004)
  9. DoD Green Procurement Strategy (Nov 2008)
  10. Army Green Procurement Guide (Dec 2010) 
  11. Federal Acquisition Regulation, Part 23
  12. USDA BioPreferred Program
  13. EPA Final Guidance on Environmentally Preferable Purchasing
  14. HJB Form 225 (JBLM Sustainable Acquisition Exception Form)
  15. UFC 1-200-2 (High Performance and Sustainable Buildings Requirements)
  16. ASA IE&E Sustainable Design and Development Policy (Jan 17 2017)
  17. 33 71 01.00 40 Overhead Transmission and Distribution

Changes or Criteria Notes to Unified Facilities Guide Specifications (UFGS)

Paragraph # and Title (if any)

Note to Designer

Change Text

 

 

 

 

 

Design Requirements

For electrical transmission and distribution lines not incorporated in the utility privatization system, the below standards apply.

 

a.       JBLM's distribution system is a single-point-grounded system operating at 13,800 volts.  JBLM has adopted Tacoma Public Utilities (TPU) design criteria as "industry standards" for utility construction.  In an attempt to provide standardized construction practices at JBLM, specific utility construction configurations from TPU's design standards have been selected and are provided herein.  Additional construction details and specifications can be can be found at TacomaPower.com and can be utilized on a case by case basis with Public Works permission.

b.      General Overhead construction requirements:

  • All new construction shall be underground unless dictated otherwise by special circumstance.
  • Pole-mounted three-phase transformer banks shall be no larger than 3-75KVA.  Pole-mounted single-phase transformers shall be no larger than 100KVA. If larger, it shall be installed pad-mounted transformer.
  • Pole-mounted transformers shall have separate ground for lightning arrestors, case grounds, and neutral conductor.  (Neutral ground is isolated per NESC.)
  • Construction shall be Grade B per the National Electrical Safety Code (NESC), ANSI C2.
  • Size, sag, and support overhead conductors per NESC and TPU standards.
  • Lightning arresters, appropriately sized, shall be provided at all risers, dead-end poles, and at each overhead and pad-mounted transformer.  All cross-arms shall be 9 foot in length unless application requires longer/larger arms for 4/0 ACSR and smaller. Use 10'-8' Arms for 336.4 ACSR. Use 14' Arms for double feeders.
  • Primary risers shall be constructed using alley-arm construction with arms parallel to main line.
  • Splices shall be of the automatic type. Deadends shall be of the automatic type for 2/0 ACSR and smaller. Dead Ends shall be bolted "Shoe" type for 4/0 and larger.   Deadend insulators shall be the polymer-type.
  • Stirrups and other connections shall be made using mechanical type connectors listed for the application.
  • Fused disconnects shall be of the loadbreak type.
  • Power poles shall be rated Class 2 and 50-foot tall for all main feeders.
  • Secondary conductor connections shall be made using compression-type connectors.

c.       Non-free-breathing electrical equipment containing dielectric fluid shall be furnished with Natural (Vegetable Oil) Ester Fluid per ASTM D 6871 - 03 (2008) and IEEE C57.147.

d.      At transition area (from Underground to above grade or vice versa), install Schedule 40 long radius GRS elbow - wrapping with a corrosion proof tape, 12-inch above grade and 12-inch below grade.

 

Notes to Designers on Drawing Content

None

 

Standard Details

 

Applicable Points of Contact

Design Standards