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Introduction Electrical systems will be provided for a new Company Operations Facility at Fort Huachuca, Arizona, including power, lighting and special systems for a fully operational facility. Elements of the various electrical systems will meet all requirements described in the RFP. General electrical design will comply with the NEC, NFPA and other applicable codes, UFC and standards. Electrical Service The primary service and pad mounted transformer will be provided by Sulphur Springs Valley Electric Cooperative (SSVEC). The contractor will provide the concrete pad and substructure. From the secondary of the pad mounted transformer, service entrance conductors will be provided through underground 4” PVC, conduit into the main electrical room. The pad mounted transformer will provide 480Y/277V power to an interior main 400 amp service entrance panel. The service entrance conductors will terminate on a service entrance main distribution panel board (MDP). Power Distribution The MDP will consist of a solidly grounded neutral 480Y/277V, three-phase, four wire panel board with a main copper bus, 100% rated main circuit breaker and grounding bus. Step down 208Y/120V secondary transformers will provide secondary distribution to branch circuit panel boards. Wall receptacles will be provided in quantity and locations described in the RFP. GFI type duplex receptacles will be provided in restrooms, break rooms and other areas as per NEC 70. - - Distribution panels will be provided with copper phase, neutral, and ground busses and balanced within ±10% of the average load. Panel boards feeding nonlinear loads will have a 200% neutral bus to avoid overheating. Transformers feeding non-linear loads will be K-rated to protect from harmonic currents. Branch circuit conductors will be copper, sized for maximum 3% voltage drop and installed in a conduit with grounding bushings at all conduit terminations. EMT conduit will be used for concealed installations. Rigid steel conduit will be used where conduits may be subject to physical damage. GFI receptacles will be wired so loss of power on one receptacle does not affect downstream receptacles. Service will be sized for 25% spare capacity to accommodate for future expansion. Transient Voltage Surge Suppression (TVSS) A UL 1449 listed and labeled TVSS device will be installed adjacent to the main distribution panel to provide a path to ground for an electrical surge and to limit the magnitude of transient surges in the building electrical system. Grounding Power system grounding will be provided in compliance with Article 250 of the NEC (NFPA 70) and UL 467. A complete interconnected counterpoise system will be provided around the building. Major elements that will be grounded to this system include the transformer enclosure, lightning protection down conductors, the service entrance panel ground bus, communication grounding bus, building steel and primary metallic water service piping. All connections to the counterpoise system will be made with exothermic welds. The maximum impedance of this system will be 10Ω. Lightning Protection A complete lightning protection system will be provided conforming to NFPA 780. All connections will be exothermically welded and terminated into the building grounding loop. Interior Lighting Lighting will be designed per IESNA standards and to the requirements of the RFP. The primary lamp source will be fluorescent utilizing energy saving electronic ballasts with a lamp color temperature of 4100K and Color Rendering Index (CRI) of 85 or higher. Ballast shall be energy saving high frequency electronic with total harmonic distortion less than 10%. The use of this type of ballast will result in overall energy savings throughout its life cycle. Dimming ballast will have the capability of dimming to 1%. All fixtures shall be of heavy commercial grade to ensure long life, quality lighting and ease of maintenance. Direct/Indirect fixture types will be used to limit glare for improved viewing of video display screens and be controlled with commercial grade area switching, occupancy sensor or dimmer as required. Task lighting will be provided at every workstation to increase occupant lighting level controllability. The use of occupancy sensors will reduce the overall energy consumption of the building. Illumination levels will be as recommended by the IESNA and providing levels required for LEED. Exterior Lighting Exterior building mounted lighting fixtures shall be sharp cut-off type and shall be controlled by photocell. Contractor will provide pole foundations for lights and poles supplied by SSVEC. Emergency and Egress Lighting Where required, egress lighting will be provided with general luminaries connected to the lighting circuit ahead of the local switching. Emergency lighting will be provided in the combination form of integral emergency battery ballasts in the luminaries and Emergency Battery Units along the path of egress. Exit signs will be internally illuminated LED with integral battery backup. The emergency lighting at the exterior egress doors shall be provided to illuminate the path of egress outside of the exit. Emergency lighting will be in accordance with NFPA 101. Security Systems Conduit, power and control wiring to support the ICIDS system in the Arms room will be provided. A one inch exposed rigid steel conduit will be run from the Arms room to the central telecom room. Fire Alarm and Mass Notification System A combined Fire Alarm Mass Notification System will be installed in the building conforming to UFC 3-600-01, UFC 04-021-01 and NFPA 72. The system will be looped, Class A, addressable, intelligent, supervised with a combined Fire Alarm Control Panel and Autonomous Control Unit located in the main electrical room. Photoelectric duct detectors will be provided as in Air Handling Units when required by code. In accordance with NFPA 72 and the ADA, combination audible/visual notification devices will be installed throughout the facility to provide “public mode” notification of an alarm. Visual devices will be synchronized when more than one device is located in a common field of view. Tamper and flow switches will be provided on the sprinkler system at the fire risers, valve pits and at the zone valves. The system will be capable of providing Mass Notification functions according to UFC 04-021-01, including live voice messaging, telephone and wireless input, and playback of prerecorded messages. Weatherproof exterior speakers will be provided at exterior gathering locations and entrances to the buildings. Speakers will be shared while separate strobes will be provided for notification of Fire Alarm (white) or Mass Notification (amber) alarms. Communication capability will be provided in the form of a Monaco radio transmitter compatible with the installation system.