Auburn University
Auburn University
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Auburn University
 


D50 Electrical

  1. General


    1. All installed electrical equipment to be new, specification grade & listed with UL (Underwriters Laboratories Inc.). Electrical installation to comply with National, State,& Local Codes to include latest revision of ANSI C2, (National Electrical Safety Code), NFPA 70 (NEC & Art. 250 Grounding), and NFPA 70E (Workplace Electrical Safety.)


    2. Electrical equipment, and exposed conduit (see special notations regarding exposed conduit below) in particular, to be installed in a neat and workmanlike manner per Section 110.12 of the National Electrical Code. Installation to comply with (ANSI/NEIS) NECA 1-2000 on Standard Practices for Good Workmanship in Electrical Contracting. Generic lighting fixtures (non-specialty items) to be Lithonia, Hubbell, or Cooper; electrical equipment to be Square D, General Electric or Siemens.


    3. Conductor/Cable to be Cu (Copper) THHN, Cu THHW, or Cu XHHW as applicable; minimum wire size to be #12AWG; minimum conduit to be 3/4" C; #12AWG/ #10AWG to be solid; #8AWG/larger stranded; Service Entrance to be Cu XHHW; penetrations to be fire-stopped (IBC/NFPA (202, 221, etc.) & in no case less than fire-rating of existing building surface; no back-to-back outlets (minimum 24” separation on fire-rated walls.)


    4. Rigid/Intermediate Metal Conduit to be used (indoors/outdoors) above grade where exposed to direct physical damage; Electrical Metallic Tubing may be used (indoors only) in concealed/protected areas not subject to physical damage; liquid tight flexible metal conduit to be used for final connection to fan/pump motors or vibrating loads.


    5. PVC or Rigid Metal Conduit meeting Section 300.6 corrosion-protection
      requirements in NEC to be used below grade; when PVC is used, a transition to metal conduit shall be made at minimum 12" below grade such that only metal conduit exits concrete or ground; Galvanized Rigid Steel (GRS) or PVC Schedule 40 may be used in concrete; GRS or PVC Schedule 80 to be used for direct burial.


    6. Outdoor enclosures to be NEMA 3R or NEMA 4; indoor enclosures may be NEMA 1 in dry areas, but shall be NEMA 12 in areas exposed to moisture; floor-mount electrical equipment to have individual 4-inch high concrete housekeeping pad extending 6 inches out from base of equipment (at front and both sides); outdoor receptacles to be groundfault-
      current-interrupt with weatherproof covers; outdoor light fixtures and wall switches to be suitable for wet/damp locations.


    7. Fire alarm devices/components for interface to existing FA system (facility; campuswide) to be networkable/addressable, SimplexGrinnell compatible, certifiable by UL, & comply with NFPA 72 Fire Alarm Code; on work completion, newly installed fire alarm equipment shall be fully operational/functional and completely integrated into existing
      facility/campus-wide Fire Alarm System (FA Spec to comply with above requirements).


    8. Receptacles to be NEMA 5-20R; Construction Series Grainger 6C637 Gray (Hubbell CR5352GY) with stainless steel Grainger 5C228 (Hubbell S8) wallplate for Duplex; and Commercial Spec-Grade Grainger 3AU51 Gray (Hubbell GFR5352GYA) with stainless steel Grainger 5C235 (Hubbell S26) wallplate for GFCI (or engineer-approved equals).


    9. Wall Switches to be 20A, 120V-277V, 1-Pole/Toggle (Side Wire Only) Construction Grade Grainger 5Z747 Gray (Hubbell CS 120GY) or 3-Way Toggle/Maintain Grainger 4D216 Gray (Hubbell CS 1223GY) or 4-Way Toggle/Maintain Hubbell CS 1224GY with stainless steel Grainger 5Z994 (Hubbell S1) wallplate (or approved equal).


    10. Panelboard Schedules to be as shown in attached Spreadsheets for 1-phase/3-phase; individual/total connected load to be tabulated; panelboard summaries not acceptable.


    11. Electrical boxes and covers to be color coded as follows: Normal Power = Silver (Unpainted); Emergency Power (NEC Art. 700) = Yellow; Standby Power (NEC Art 701/702) = Orange; Fire Alarm System = Red; Telecommunications = White; Security = Blue.


    12. Electrical boxes (stainless-steel/outdoor-rated) for irrigation control to be mounted on building (3-ft A.F.G.) with power outlet & control; all holes to be in bottom of box.


    13. Exposed Conduit: Conduit to be concealed in all public areas (walls, ceiling, floor surfaces); conduit shall not be exposed except in mechanical, electrical, and telecom rooms or other locations approved by University Architect; Wiremold V700 (steel) or equal to be used indoors (i.e., inside classrooms) for approved/exposed raceway.


    14. In new facilities, electrical rooms shall be vertically-stacked (with sufficient overlap) to permit straight/vertical route of busway and cable raceway between multiple levels; Electrical Rooms to provide sufficient physical space for present/future needs; Electrical Rooms to be centrally-located (minimal cable lengths) to reduce costs & voltage drop.


    15. In new buildings, early decision to be made on size/location of main transformer, generator/automatic-transfer-switch, and need for fire pump; main transformer to be located so as to minimize expensive/secondary cable length; main transformer, fire pump, generator, & auto-transfer-switch to be located so as to minimize cable lengths.


    16. General Lighting


      1. Utilize long life bulbs; do not use incandescent bulbs without prior approval.


      2. Provide lighting calculations to University Architect for design and review.


      3. Maintain uniformity of interior light fixtures visible from outside (looking in).


      4. Approved Manufacturers: Lithonia, Hubbell, or Cooper.


      5. Diagonally opposite corners of recessed fixtures shall be securely supported from and directly attached to building structure so as to comply with luminaire mounting requirements in NEC Article 410 independent of any support provided from suspended ceiling grid. All fixtures (recessed and other) shall be directly attached to building structure using reusable bolt-/screw-type hardware.


      6. The use of occupancy sensored lighting controls is encouraged. Standards are:


      Applications Manufacture Model # Name
      Mechanical, Eletrical and Telecom Rooms, Storage Areas, Closets Watt Stopper TS-400-24 Inteliswitch TS Digital Time Switch
      Classrooms, Conference Rooms, Office Break Rooms Levitron OSC30-M0W

      Multi-technology Ceiling Mount Occupancy Sensor

      Restroom, Hallways Levitron OSC20-U0W Ultrasonic Ceiling Mount Occupancy
      Janitor Closets, Small Rooms (i.e. Copy or Break), Some Offices Levitron ODS0D-IDI Passive Infrared Wall Switch

       

    17. Emergency Generators


      1. Natural gas or diesel fuel is acceptable; preferred manufacturers are Caterpillar, Cummins/Onan, Kohler, and Generac (latter for units rated 600kW or less).


      2. If diesel, provide belly tank sufficient to supply any fire pump start/operation for 2.0 hours plus all other rated/connected loads for 48 hours (calculation to be provided for diesel fuel consumption); underground tanks are not acceptable.


      3. Generator shall be subjected to minimum 4-hour test run at full load; load bank to be quoted (as add alternate to generator/automatic-transfer-switch bid) to permit 4-hour test of generator at 100% rated kW load.


    18. Breakers to be bolt-in type; plug-in/snap-in type not permitted.


    19. Grounding rods to be CADWELD type; mechanical connections are not permitted.


    20. Exterior lighting to utilize photoelectric (PE) controls. Timers are not acceptable.


    21. Emergency telephones to be provided on exterior of building. Location shall be approved by University Architect. The brand and model of all emergency telephones will be specified by the AU Office of Information Technology.


    22. All wiring shall be in conduit with the exception of telecommunications wiring where cable trays or hooks/rings are provided above suspended ceilings.


    23. Sleeves to be rigid conduit with bushings.


    24. Ductbank


      1. Required for underground electrical and telecommunications.


      2. Concrete encased PVC pipe.


      3. Refer to Section 4 Telecommunication Pathways.


    25. Use of Type MC Cable is not permitted except for light fixture whips.


    26. Use of Type NM (Romex) Cable is not permitted.


    27. Cable Tray


      1. Shall be provided for telecommunications.


      2. No power shall be run in cable tray.


    28. For fire alarm information see Section D40 Fire Protection.


    29. Switches – Dead front type.


    30. Auditorium Lighting – Particular care to be exercised when laying out lights in tiered auditoriums reference maintenance & lamp replacement. Occupants shall not have to walk through dark auditorium to turn on lights. Step lights shall be “on” at all times.


    31. Stairwell Lighting – Recently, Auburn University has had to retrofit new buildings with additional lighting in stairwells; lighting calculations to be provided for review.


    32. Three Phase Padmount Oil-filled Transformers


      1. Building transformers shall be sized, reviewed, and approved by Auburn University’s Electrical Infrastructure Engineer.


      2. Furnish three phase padmount oil-filled transformers. Each transformer shall be 7.2-12.47 KV/277-480 V, 3PH, 4W, Y-Y, 95KV, BIL, 65 degrees C rise.


      3. Transformers to comply with latest applicable NEMA/ANSI/IEEE standards.


    33. The AIA Masterspec – Short Form Specifications for the sections listed below are considered to be a good example of complete electrical specs and it is recommended that the Designer use these as a template when creating the specifications for the project. Copies of these specifications are available for review through the Facilities Division:

      1. 13100 SF – Lightning Protection


      2. 13851 SF – Fire Alarm


      3. 13915 SF – Fire-Suppression Piping


      4. 14240 SF – Hydraulic Elevators


      5. 16051 SF – Common Work Results for Electrical


      6. 16060 SF – Grounding and Bonding


      7. 16073 SF – Hangers and Supports for Electrical Systems


      8. 16075 SF – Electrical Identification


      9. 16120 SF – Conductors and Cables


      10. 16130 SF – Raceways and Boxes


      11. 16139 SF – Cable Trays


      12. 16140 SF – Wiring Devices


      13. 16231 SF – Packaged Engine Generators


      14. 16410 SF – Enclosed Switches and Circuit Breakers


      15. 16415 SF – Transfer Switches


      16. 16441 SF – Switchboards


      17. 16442 SF – Panelboards


      18. 16461 SF – Low-Voltage Transformers


      19. 16491 SF – Fuses


      20. 16511 SF – Interior Lighting


      21. 16521 SF – Exterior Lighting


  2. Telecommunications


    1. Architects/Engineers to obtain the latest version of Auburn University’s
      Office of Information Technology’s Telecommunications Infrastructure
      Standards, Spaces and Pathways.
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