SECTION: 26 20 00 INTERIOR DISTRIBUTION SYSTEM
 
Criteria

  1. Quality Assurance: EP 415-1-261, Volume 4
  2. UFGS SECTION 26 20 00 INTERIOR DISTRIBUTION SYSTEM
  3. THE IESNA LIGHTING HANDBOOK
  4. NFPA 101 Life Safety Code
  5. NFPA 70 National Electrical Code
  6. IEEE C2 National Electric Safety Code
  7. UFC 3-520-01  INTERIOR ELECTRICAL SYSTEMS
  8. JBLM 26 20 00 - Interior Distribution System.pdf
Changes or Criteria Notes to Unified Facilities Guide Specifications (UFGS)
Paragraph # and Title (if any) Note to Designer Change Text
     
                                                                                                                                                         
Design Requirements
  1. Fire alarm panels, transmitters, Interruptible Power Source (IPS) and Uninterruptible Power Source (UPS) units, and other sensitive electrical or electronic equipment shall be installed in dedicated electrical equipment rooms readily accessible to maintenance personnel independent of building occupants (i.e., space accessible from exterior of facility), not in mechanical spaces or other areas subject to excessive temperature and moisture.  
  2. Include space and dedicated circuits for vending machines and receptacles for floor buffers in barracks designs. As a minimum base corridor and general cleaning receptacle spacing on use of equipment with 25-foot cords.  
  3. Electrical design for troop barracks shall provide adequate capacity and branch circuits per individual room to support installation of appliances to include refrigerators, microwave ovens, and coffee makers.
  4. Provide for communication service (telephone/modem and network) in electrical and mechanical equipment room(s) for remote monitoring and control functions.
  5. When designing for electrical loads in a laundry facility in a barracks, assume all the washers and dryers will be operating at the same time.  Plan for 100% load.
  6. All buildings in which DDC systems are installed or in which DDC systems will be installed shall have a Lon Works compatible meter installed at each electrical service. All buildings without a DDC system shall have a meter with a Modbus RTU/RS485 digital output installed at each electrical service.  
  7. An outlet device shall have an ampere rating that is not less than that of the branch circuit it is installed on. In the case of two or more outlet devices installed on an individual branch circuit, each outlet device shall have the same ampere rating not less than that of the branch circuit over current protection device.
  8. All raceways will require a separate equipment grounding/bonding conductor rather than using the raceway as a grounding/bonding path.
  9. Do not use set-screw type conduit fittings on any type EMT conduit.  Install only compression fittings with EMT.
  10. Provide Arc Flash Study and install PPE level label on each panelboard.
  11. Install #4/0 BC for all counterpoise/ground ring system. Install at least one test well. If the perimeter of counterpoise/ring ground system is 400 ft - 800 ft, install two test wells. If the perimeter of counterpoise/ring ground system is greater than 800 ft, install at least four test wells. The burying depth of counterpoise/ring ground system shall be minimum 36 inches below the finished grade and minimum 6 ft away from the structure foundation.
  12. No shared neutrals between circuits.
Notes to Designers on Drawing Content
  1. Indicate available fault currents 22,000 AIC and above on power riser diagram.
  2. Provide "Connected and Demand Load Summary Schedule" on Power Riser Diagram Drawing.



Standard Details


Applicable Points of Contact
Design Standards