DIVISION 16 ELECTRICAL

Transcription

1 DIVISION 16 ELECTRICAL This division contains the following elements: 1.1 General Electrical Requirements. 1.2 Electrical Distribution System. 1.3 Power Distribution System. 1.4 Lighting System. 1.5 Emergency Power Distribution System. 1.6 Fire Alarm Detection System. 1.1 GENERAL ELECTRICAL REQUIRMENTS A. Work within this division shall include, but is not limited to, architectural, engineering, and specialized consultant design to install electrical systems in the most professional and economical way to satisfy M-DCPS requirements. B. Low voltage raceway systems, except fire alarm, are not included in this Division. Raceway systems including but not limited to fire alarm shall be designed in accordance with this Division. See Division 13 for telecommunications/data, intercom, clock/bell, ITV/media retrieval, intrusion detection, CCTV, card access, and energy management systems for raceway sizing requirements. C. Codes and Standards. 1. The electrical work shall comply with the requirements of the applicable authorities having jurisdiction and with the following National, Local codes and standards: a. Florida Department of Education, Office of Educational Facilities State Requirements for Educational Facilities (SREF), FBC Chapter 423. b. National Electrical Code (NFPA 70). c. Florida Building Code (FBC). d. M-DCPS Design Standards and program requirements. e. M-DCPS Master Specification Guidelines. f. National Fire Prevention Association (NFPA) codes and standards. g. Institute of Electrical & Electronics Engineers, Inc. (IEEE) standards. h. Florida Accessibility codes. i. American National Standards Institute (ANSI). j. American Society of Civil Engineers (ASCE). k. Americans with Disabilities ACT Accessibility Guidelines Requirements (ADAAG). l. All other applicable National, Local codes and standards. m. Illuminating Engineering Society of North America (IESNA). n. All electrical equipment shall be listed by a Nationally Recognized Testing Laboratory (NRTL) recognized by OSHA. 2. Selected code requirements are listed within M-DCPS Design Criteria for clarification or emphasis. Research and design according to applicable codes. D. Lightning Protection. 1. According to NFPA 780 and the FBC, educational facilities have a risk index of severe and shall be protected accordingly. Oct 2013 Electrical 16-1

2 2. Direct lightning protection is required for the television antenna and flagpole. 3. Provide transient surge/lightning protection at the main electrical switchgear and the second tier distribution level, telecommunications, CCTV, and fire alarm systems. E. Products. 1. Provide certified or listed parts, equipment, assemblies, and installations when categories for such individual electrical components and systems are listed by a Nationally Recognized Testing Laboratory (NRTL) recognized by OSHA. 2. Unlisted or uncertified submittals, equipment, and construction may be reviewed on a per condition basis. F. Coordination. 1. Confirm M-DCPS design requirements are incorporated in the drawings and specifications and do not allow interpretation. 2. Contract Documents shall include new or existing main electrical service, main distribution systems, and related underground services as it affects the scope of work. 3. Review FPL rebates and design incentives, or any other rebate programs to incorporate energy efficient equipment or systems into the project. 4. For projects involving additions, alterations, or renovations, M-DCPS will furnish electrical plans and underground utility site plans, upon request and when available. It shall be the responsibility of the A/E using these plans to verify accuracy by visiting the site, verifying utility companies records, study the feasibility of new main electrical service on new additions and to return all borrowed plans to M-DCPS. 5. Connect any electrical equipment or devices installed under other trades. Coordinate with other construction documents and subcontractors to prevent omissions or field conflicts. 6. Coordinate with Division 7 and 15 for clearances between the finished roof and equipment and other related items. See Division 5 for equipment framing supports. G. Provisions for Future Expansion. 1. At new school projects, provide spare capacity in the switchboard and the control panel or equipment of each low voltage system to serve future building expansion by addition(s) or by portable classrooms as noted in Division 13 and FBC Provide empty conduits for each system from its central equipment to school building exterior. Cap and mark all conduits for future building expansions. H. New Services. 1. The power service entrance and the main distribution equipment proposed for new or existing sites require acceptance by M-DCPS Building Official. 2. Facilities shall be supplied by only one service unless otherwise accepted in writing by MDCPS Facility Design and Standards. The A/E shall compare the cost involved in adding new breakers in existing switchboards, to adding a new service for the new building, as per NEC Article 230.2(A) thru (D), to reduce construction cost. The results of the investigation shall be given to M-DCPS Facilities Design and Standards for their review. Request for acceptance shall be submitted in Phase I Design before continuing with the work. 3. Each submittal shall be properly documented and based on program needs, the size and location of the addition, the recorded school load, and survey of actual conditions. Oct 2013 Electrical 16-2

3 1.2 ELECTRICAL DISTRIBUTION SYSTEM A. Voltage Drop and Short Circuits. 1. Allowable voltage drop shall be according to NEC and The symmetrical fault current at any distribution, lighting, or power panelboard shall be calculated from the maximum available fault at service entrance, according to utility. Obtain in writing from Florida Power and Light (FPL), the maximum symmetrical fault circuit current for the past 12 month and submit to M-DCPS. Incorporate calculations results on drawings next to Power Riser Diagram for new facilities and major additions. B. Distribution System Voltage. 1. In new school projects, use 277/480V, 3-phase, 4-wire, grounded wye wherever possible. 2. Use of 120/208 volts, 3-Phase, 4 wire grounded wye or 120/240V single phase requires prior acceptance by M-DCPS on a per condition basis. 3. Large addition projects, equal or larger in area to the existing school, without lighting upgrades to the existing schools and with a 208V or 240V distribution systems, use 277/480V for the new construction. Allocate a new building main at the new construction to feed the existing school maximum demand through a new step down transformer. The existing school shall remain as presently designed and wired.. 4. Large addition projects using 480V which include a lighting replacement for the existing school shall use 277V lighting for the entire school. Any 120V panel that feed the old lighting shall remain as spare capacity to serve future computers in classrooms. A/E shall include in the design, the rewiring of the entire existing lighting wiring system for the new lighting replacement project. Other 120V loads shall remain Asis. 5. All electrical services shall be grouped at one location at the school site. Exception: Fire pump. C. Switchboards. 1. Main and distribution switchboards shall be either circuit breaker or fusible switch type depending on available fault current, and ground fault system protection. 2. Provide a maximum of six disconnect means as permitted by NEC (A). Additional disconnects means may be permitted as per NEC (B). 3. To reduce construction costs, main circuit breakers shall not exceed 1600 amperes, unless accepted by M-DCPS on a per condition basis. Provide additional mains as required to meet load conditions. 4. Provide local distribution panels with series protection to contain the small ampacity breakers as needed, instead of small ampacity breakers in switchboards with large frames and high interrupting capacity. 5. Surge/ Protection Devices shall be provided at the main switchboards and at a second tier distribution level. 6. Bus bars in switchboards, busways, panelboards, and motor control centers shall be copper. 7. A/E shall specify the switchboard with an intelligent meter capable of remote monitoring by the school EMS system. 8. Floor mounted switchboards and motor control centers shall be on 4-inch high concrete pads. Oct 2013 Electrical 16-3

4 9. Switchboards and distribution panels shall have a minimum spare capacity to satisfy FBC-423 requirements. D. Power Service Entrance. 1. Service entrance shall be underground, in painted galvanized rigid steel (GRS) or Concrete-encased Schedule 40 polyvinyl chloride (PVC) conduits. Overhead services are not allowed. 2. The service entrance shall be centrally located to allow shorter distribution feeders. 3. Service entrance, transformer pad, transformer vault, underground conduit, pull boxes, grounding, and other provisions for electrical utilities shall be according to the utility company s requirements. 4. Coordinate the point of service and the location of the service transformer with M- DCPS and FPL. 5. Include in the drawings, configuration and routing of the utility company s underground primary service conduits to a pad-mounted transformer or vault. 6. Obtain, sign, and resubmit FPL s specifications regarding pad-mounted transformers, transformer vaults, underground service conduits, and other related requirements to be included in Phase 3 submittal. 7. All transformer vaults shall be designed following FPL s latest design guidelines. E. Service Transformer. 1. Service transformer shall be pad-mounted whenever possible. Overhead transformers are only allowed for temporary service when accepted by M-DCPS Facilities Design and Standards on per condition basis. 2. Pad-mounted transformer or vault location will be based on site and load requirements, accessibility, and proximity to utility lines. 3. Pad transformers or vault size will be decided by the utility company based on load requirements, provisions for future expansion, ventilation, and other utility requirements. 4. Coordinate with FPL the type and location of the metering equipment. 5. Locate a pad-mounted transformer at the building perimeter and next to the main electrical room. See Division 2 for fencing requirements. F. Equipment Location. 1. Install switchboards and panelboards according to manufacturer s recommendations and maintain clearances and working spaces required by the NEC and OSHA. 2. The main electrical room shall be centrally located next to the transformer vault/pad and contain the main switchboard that receives the service entrance. Main electrical room shall be a dedicated room with 2 entry/exit doors (when required by NEC 110). Doors shall open to the exterior of the building in the direction of exit and equipped with panic hardware. 3. Switchboards, distribution panelboards, contactors, and any other electrical control or distribution equipment shall be installed in electrical rooms and not in student occupied areas. Equipment shall be key-locked in all electrical rooms. 4. Lighting and power panels may be installed in dedicated electrical rooms or staff occupied areas for shorter branch circuiting and users local control. Lighting and power panels shall not be installed in corridors. 5. Provide, in the existing switchboard, a disconnect/overcurrent protection device to feed the power conductors of new building at existing facilities. Study feasibility of Oct 2013 Electrical 16-4

5 providing a new electrical service as per NEC Article (A) to reduce construction costs. Submit findings to M-DCPS Facilities Design and Standards for approval. If not feasible, obtain written acceptance from M-DCPS Facilities Design and Standards in Phase 1 to use new mains, new service entrances, or new service laterals from the FPL. 6. Step down transformers shall be located in electrical rooms only. G. Cables and Wires. 1. Cables and wires shall be copper. 2. Cables and wires for use in underground conduits shall be listed for wet locations use, by a Nationally Recognized Testing Laboratory (NRTL) recognized by OSHA. 3. Aluminum conductors are not allowed. H. Conduits. 1. Underground secondary service entrance conduits from the utilities transformer shall be painted galvanized rigid steel conduit (GRS) or concrete-encased PVC conduit. 2. Conduits shall be sized according to NEC, but feeders and home runs shall not be less than 3/4" diameter and 1/2" thereafter. See Division 13 for low voltage system conduit requirements. 3. Provide pull wires in empty raceways where no conductors are installed. Provide marking tags showing opposite destination noting building and closet number at each end. 4. Conduits shall be underground or concealed in walls or ceiling spaces in normally occupied spaces. Exposed conduit, except in electrical, telecommunications, and mechanical rooms, requires M-DCPS acceptance on a per condition basis. a. Interior conduits shall be steel. b. Set screw fittings and compression fittings shall be steel. c. PVC conduit can only be used at interior locations if embedded in concrete or installed under slabs on grade. d. Exterior conduits for underground use shall be painted GRS or PVC Schedule 40, direct buried or concrete encased according to M-DCPS Master Specification. e. Exterior exposed conduits in wet locations shall be GRS, IMC, or PVC flexible metal conduit with PVC sun-resistant jacket with liquid tight steel fittings. Exterior exposed conduits may be EMT, if it is located a minimum of 96 AFF, and if it is protected from direct rain. All EMT conduits shall be painted to match adjacent surfaces. f. Direct buried underground conduits for low voltage systems and feeders, shall be installed in accordance with NEC Table Use proper spacers between conduits and 3 inch wide electrical warning tape 8 inches below grade. g. Directional boring is acceptable as a cost savings measure, on a per conditional basis and with prior written approval by MDCPS Facilities Design and Standards. Direct boring installation shall meet all applicable NEC requirements. 5. Conduits requiring concrete encasement shall comply with the following: a. Concrete encasement shall have 3 inch minimum cover on all sides and 2-1/2" minimum clear separation between power conduits. b. The minimum separation between power conduits and signal conduits in the same concrete encasement shall be 3 inches. c. The minimum depth of concrete encased duct banks beyond the building perimeter shall be 24 inches to the top of the concrete encasement. Oct 2013 Electrical 16-5

6 I. Pull Boxes. 1. Provide underground pull boxes where sharp bends, branching, or more than four 90º bends are required. For long conduit runs, provide pull boxes every 250 feet maximum. 2. Metal cover shall be grounded. 3. Non-concrete covers shall be bolt-down type with stainless steel screws. 4. Provide a traffic type cover where there is any possibility of vehicular traffic. 5. Pull boxes in corridors or pedestrian traffic areas including sidewalks are not allowed. J. Grounding. 1. Connect the grounding system of any facility or standalone building to the copper domestic water main entrance with at least 10 feet of its length below grade where is enters the building in accordance with NEC and , and to the structural steel. Add 3/4" diameter, 10 foot long ground rods to the grounding electrodes to obtain a maximum 25 Ohms of resistance to ground. 2. Grounding system shall be wired from the main switchboard to all panelboards. 3. Feeders and branch circuits shall have copper ground conductors. Do not use conduits as ground paths. 4. Provide continuous grounding for microprocessor equipment 1.3 POWER SYSTEM A. Provide a main circuit breaker to each panelboard sized according to Code. B. All lighting and power panels shall be provided a minimum of 20 percent spare breakers and a minimum of 10 percent spare capacity in all main panels and switchboards according to State Requirements for Educational Facilities (SREF) C. For large groups of motors, provide a motor control center with a transformer with 120 volt secondary for control circuits, hand-off-auto selector switch, and on-off showing lights in each starter. D. Transient surge protection devices shall comply with UL 1449-Third Edition, ANSI C /1EEE C IEEE, and other applicable codes. 1. Protection shall be provided at the main switchboard level and second tier panelboards: a. Phase to phase. b. Phase to neutral. c. Phase to ground. 2. Clamping voltage shall be 120 percent of the nominal peak line voltage. E. Provide control wiring and interlocking for the operation of all motor loads, as required by each motor circuit or dust collectors, fire suppression systems, or any other mechanical equipment. F. Install magnetic starters or thermal overload switches for roof fans or other similar equipment at an interior location. If an integral service disconnect switch is not provided with the equipment, provide an un-fused NEMA 3R safety disconnect switch or a Oct 2013 Electrical 16-6

7 weatherproof manual motor-rated switch on the roof near the equipment. Group multiple fans together when practical. G. Provide for wired remote control operation and a separate circuit for the scoreboards in gymnasiums. H. Provide non-linear electrical panels to supply receptacle outlets dedicated to computers/data. 1. These panels shall not feed any other loads. 2. Have 200% rated neutral bars, with the neutral feeder conductor rated at 200% of phase conductors. 3. Dry type step down transformers (480V/ V) feeding non-linear loads shall be K- 13 type only. I. In industrial education classrooms and shops, provide power column drops from overhead wireways to each workbench and to electrically driven machinery. 1. During normal operation, the power supply shall be through a keyed, magnetic controlled relay ON/OFF at instructor s area. 2. Provide for emergency power shut-off from the instructor s station and at other locations of the instructional space as required by FBC regarding special life safety provisions. 3. Master control switch in vocational labs were In-Contract and Not-In-Contact power tools are being used, shall have a manual reset switch to prevent automatic restart of power equipment after power failure. J. Receptacles shall be 20-Amp minimum as follows: 1. Program required exterior receptacles shall be GFI duplex with a weatherproof gasketed cover. 2. Receptacles installed outdoors, in wet locations, science labs, staff toilet rooms or within 6 feet of water supplies shall have ground fault protection by a built-in or upstream protection device. This requirement does not apply to single receptacles serving only water coolers. 3. Provide 120V circuits with 20 amp dedicated circuits, as required for floor buffer machines, in corridors with receptacles at intervals not to exceed 50 feet. 4. A minimum of eight (8) appropriately placed convenience receptacles shall be provided in each instructional space, two (2) in each major wall. See program requirements for other electrically operated equipment in the instructional space to have separate dedicated receptacles or connections to a separate circuit other than the convenience receptacle circuits. 5. Locate voltage transient protection at low voltage panels feeding electrical outlets for computers and other vulnerable solid-state devices. Transients control system shall not short circuit the electrical system. 6. Provide a GFI duplex receptacle per workstation in science classrooms. 7. Provide receptacles in a 4-inch metal surface raceway with recessed receptacles, wall mounted at classrooms and labs with a high concentration of electric equipment for students training. 8. Provide emergency quick disconnect switches in science labs, industrial education classrooms/shops, and other locations according to FBC Chapter 423 (SREF). Oct 2013 Electrical 16-7

8 9. Offset receptacles in common walls of adjacent music rooms to maintain room envelop sound ratings and use baffles and sound insulation materials to minimize sound transference through walls. 10. In computer labs, provide metal wall mounted surface raceways for data/telephone, power. Provide self-standing raceways if away from walls. Outlets shall be protected by an overhang on the raceway to minimize accidental contact with live conductors. 11. At auditoriums or multipurpose rooms, provide convenience receptacles at walls spaced at intervals not to exceed 20'-0". 12. In gymnasiums, provide a minimum of eight (8) appropriately spaced convenience receptacles. Coordinate locations of receptacles with location of bleachers. 13. Provide a duplex GFI protected receptacle in each mechanical, electrical and custodial rooms and on either side of each electric domestic cooking range. 14. Do not locate outlets in bulletin boards, tackboards, or markerboards. 15. Receptacle boxes at food service areas shall be located according to manufacturer s recommendation or as follows: a. Provide in-use covers as required. b. Wall mounted 84 inches above finish floor when behind refrigerators. c. GFI protected wall mounted 42 inches above finish floor to the centerline of a horizontal box when above counters. d. GFI protected floor mounted at freestanding equipment, based on equipment requirements: 1) An outlet box with top at least 6 inches above finish floor. 2) 18 inch high conduit rough-in for hard wire connection. 16. Locate a bell or buzzer outside the food service manager s office switched from the receiving door. 17. Provide a GFI duplex receptacle at the compactor area 6'-0" above finish floor and centered on the width of the compactor. See Division 11- Food Service Equipment for additional information. 18. At shops and other locations with motor operated equipment, coordinate power at receptacles according to manufacturer s requirements. 19. Provide a 120V duplex receptacle (GFI) within 4 feet of the water treatment system. 20. See the Electrical section of the General Considerations of the Educational Specifications for additional requirements. K. The wiring of 120V branch circuits extending more than 100 feet from the panelboard to the nearest outlet shall be No. 10 wire minimum. L. Use 3 phase kilns to avoid unbalancing the power sources. M. Provide the following for the Non-In-Contract hand held radio system: 1. The Not-In-Contract radio repeater equipment shall be located in an air conditioned secured room supervised by the School s administrative staff. 2. Provide one 120V duplex outlet on a 20-Amp dedicated circuit, connected to emergency power. 3. Provide one 2-inch conduit from the repeater to the antenna location. 4. Provide lightning protection for the repeater s antenna. N. See Division 10, Specialties for information regarding electric hand dryers. Oct 2013 Electrical 16-8

9 1.4 LIGHTING SYSTEM A. General Illumination: 1. Classroom illumination (classrooms and labs) shall provide an average maintained footcandle level in accordance with FBC-423 latest edition and other spaces shall follow the recommendation of the Illuminating Engineering Society North America (IESNA), latest edition. 2. Gymnasium illumination shall provide a minimum of 50 foot-candles at floor level, and a lamp source yielding 6500 K. 3. Illumination Factors: a. Reflectance shall be considered as close as possible to actual and properly documented for walls, ceiling, and floors. For a "typical" classroom the reflectance shall be 50, 80, and 20 respectively. b. Maintenance and dirt factors shall be The school lighting system shall meet a nationally recognized high-performance green building rating system as approved by the Department of Management Services like USGB leadership in Energy Design (LEED) or others. 5. Life cycle cost analysis shall be performed in selecting the most advantageous luminaires and lighting source for the application. Refer to the Life Cycle Cost guidelines for materials and buildings for Florida s Educational Facilities for the development of the analysis. 6. The average to minimum maximum allowable ratio at task height within any four foot distance from one another shall be 2:1 foot candles. 7. Provide a computer-generated printout or the foot-candle levels for typical classroom layouts. The lamp lumen output shall be based on photometric data provided by an independent testing laboratory. 8. DO NOT use coffered type light fixtures. 9. Avoid placing light fixtures directly above projection screens; if necessary provide switching of the fixture allowing teacher control of fixture. 10. All ESE designated classrooms shall have light emitting diode (LED) lighting fixtures. B. Specialty lighting shall be according to program requirements. Theater stage and general lighting shall be LED based. C. Lighting fixtures in flammable storage rooms, spray booths, and other hazardous locations, shall meet the requirements of NEC Chapter 5. D. Parking and site lighting shall be according to the latest edition of FBC-423 requirements, local regulations, program requirements, and as recommended by M-DCPS School Police. 1. LED light sources shall be the primary source in the design of parking lot illumination. 2. When used, high intensity discharge (HID) fixtures on emergency circuits shall have quartz re-strike a lamp. 3. Pole mounted lighting fixtures shall have fuses at the base of the pole, not at the top, in the light fixture nor the in-ground box. 4. Lighting spillage and glare into residential properties shall be controlled with factory provided shields or directional LED fixtures. Use sharp cut-off lighting fixtures to comply with dark sky requirements. E. High pressure sodium (HPS) lighting fixtures are not allowed. Oct 2013 Electrical 16-9

10 F. Lighting of exterior corridors and building perimeter shall be designed to have normal lighting illumination levels required when occupied and security lighting illumination levels when the facility is not occupied. 1. Provide security lighting to illuminate exterior walls of buildings, building entrances, service yards, in parking lots, and other locations according to program requirements and M-DCPS School Police. 2. Security lighting shall be designed to provide visibility to all exterior elevations of the facility without creating shadows. Lighting shall be focused toward the building and not illuminate adjacent property, as directed by current code. 3. Mount lighting at building perimeters to be serviced from roof decks. 4. Provide a minimum of two foot-candle for walkway covers and canopies. 5. Provide an average of one foot-candle for building perimeter lighting. 6. Provide an average of five foot-candle at building entrances. 7. Provide an average of one (1) foot-candle for courtyards. G. Athletic playing field lighting, if required by program requirements, shall be at least 30 foot candles measured at the surface. H. Do not provide lighting at shelters unless required by program requirements. I. Do not provide decorative lighting for planters, landscaping, walls of buildings, or school names unless program required. J. Provide emergency lighting according to the Emergency Power Systems section of this Division. K. Lighting shall be 277V when possible. Renovation and addition projects may use 120V, if 277V is not available. L. Bare lamps are not allowed at interior or exterior lighting fixtures. 1. Lighting fixtures shall have solid, protective lenses. 2. Exterior lighting fixtures shall be vandal resistant, and labeled for wet locations if exposed to rain. Otherwise damp location labeled fixtures are acceptable. 3. Provide impact resistant or protective covers at gymnasium lighting fixtures and other locations according to program requirements. 4. Wire guards or protective tubular shields, in place of solid lenses, are allowed at mechanical rooms, electrical rooms, telephone rooms, custodial closets, and other similar low traffic staff-only service spaces. M. Wall mounted fixtures shall be at least 7'-6" above finish floor. N. Provide lighting fixtures in locations where replacing of bulbs and lamps is easily accessible. O. Locate lighting fixtures within vertical reach of portable lifting machines. P. Lighting fixtures at stairs shall be over landings at an elevation not exceeding 12 feet above the landing elevation. Oct 2013 Electrical 16-10

11 Q. Pendant lighting fixtures are only allowed in spaces with ceiling heights greater than 12 feet above finish floor. The bottom of the fixture shall be at least 9 feet above finish floor. R. LED or fluorescent lighting fixtures shall comply with the following requirements: 1. Fluorescent: a. Fluorescent lighting fixtures shall be provided with high efficiency programmed start electronic ballasts and T-8 energy saver lamps (4100 K). Electronic ballast and lamp systems shall have at least a 5-year warranty and a total harmonic distortion not exceeding 15 percent. b. Fluorescent lamps shall have low mercury content not to exceed 2.0 mg of mercury and be TCLP-compliant. c. Efficiency of the lamp/ballast/fixture shall exceed 85%. d. Energy efficient fluorescent lamps shall have a minimum rated life of 40,000 hours, a CRI of 85, and a lumen-maintenance of 97%. e. Provide 2' x 4' lay-in fixtures at acoustical ceilings, and 2' x 4' recessed-mounted fixtures at hard ceiling locations. f. Use dual switching to achieve low level lighting instead of dimming ballasts. g. Use linear fluorescent lamps. h. Fluorescent fixtures shall be listed by a Nationally Recognized Testing Laboratory (NRTL) recognized by OSHA. 2. LED: a. The LED light source color shall be 4100 K. b. Operating life of the LED source shall exceed 50,000 hours at 25 C ambient temperature. c. Efficiency of the LED light fixture shall exceed 95%. d. LED fixtures shall be listed by a Nationally Recognized Testing Laboratory (NRTL) recognized by OSHA S. H.I.D. lighting shall be minimized and only at appropriate or programmed required locations. H.I.D. fixtures used as emergency lighting shall in corporate an integral quartz restrike lamp. T. Incorporate lighting systems requiring less energy to operate while also improving the light quality in the learning environment. The cost of implementing new technologies shall be considered when selecting lighting systems. U. Sodium vapor and incandescent light sources are not allowed in interior spaces. V. Lighting Control. 1. Lighting control for emergency lighting, if needed, shall be according to NEC and Do not use panelboard circuit breakers as operating switches. Provide readily accessible local switches as required at main entrances of instructional spaces. 3. Ceiling mounted motion sensors shall be used for lighting control in all occupied spaces, Mechanical Rooms, Electric Rooms and Custodial Closets. 4. Light switching in a space requiring emergency lighting shall have relays to allow local on/off switching and to turn on emergency lighting automatically upon power failure. Provide an extra control switch to allow the use of emergency lighting fixtures for limited illumination in instructional spaces. Oct 2013 Electrical 16-11

12 5. Classroom lighting shall be capable of two levels of lighting. One mode at full level lighting and one mode at reduced lighting level. The two levels of lighting shall switch from front of classroom to back of classroom to allow for the darkening of the front of the room for audio/visual presentations. 6. Security/outdoor lighting shall be controlled by a photocell to turn on system and the school's Energy Management System (EMS) to turn off. If EMS is not available, provide photocells or other means of control. See Division 13 for EMS information. 7. Provide switches with pilot lights for attic lights, roof lights, and remotely controlled equipment. 8. Lighting located in gymnasiums, locker rooms, assembly rooms (except in elementary schools), student toilets, corridors, covered walkways, other exterior locations and unsupervised rooms accessible to students, shall be remotely switched from the nearest custodian's room or closet and have switch identification. 9. Use relays or contactors to control HID or fluorescent lighting loads in gymnasiums, athletic fields, and other areas. Relay or contactor operation shall be controlled by key operated switches. Lighting contactors shall be mechanically held. Switches shall be located in a lockable cabinet. 10. Scoreboards in a high school gymnasium shall be controlled by a lockable type switch labeled "SCOREBOARDS". 11. Stage lighting shall be independent of any additional programmed required instructional space lighting. 12. Solar-powered school speed zone flashing light systems shall be incorporated into the design of facilities. The solar-powered flashers shall comply with all Miami-Dade County Public Works criteria and requirements. 13. Provide ceiling mounted motion sensors to control interior corridors. Motion sensor shall be spaced as recommended by manufacturer. 1.5 EMERGENCY POWER SYSTEM A. Emergency power shall be available automatically to transfer the life safety load within 10 seconds after failure of the normal power supplied to the facility. The optional stand-by loads shall transfer in seconds after failure of normal power. B. Initial source of emergency power shall be provided from a separate service lateral located ahead of the main service disconnect. C. Backup emergency power shall be provided by any one of the following: 1. Rechargeable central storage battery system. 2. Generator-supplied power with automatic transfer switch. 3. Un-interruptible power supply (UPS) with battery back-up and inverter integral automatic transfer mechanism. 4. Unit equipment type emergency lighting devices in accordance with NEC Article (e) will satisfy the requirement for initial and backup emergency power for emergency lighting equipment and exit signs, only when connected the very same branch lighting circuits that serves the general illumination in that room in which the unit equipment fixture is mounted. Cord and plugs are not allowed. Lighting fixtures with self-contained batteries for automatic emergency back-up are acceptable. Oct 2013 Electrical 16-12

13 D. All emergency equipment shall be permanently installed (not portable). 1. Receptacles are not allowed on the life safety branch of emergency power circuits, except as permitted by NEC. 2. Special receptacles for portable generators may be provided for those facilities designated emergency public shelters. Other receptacles may be provided on the optional standby branch. Coordinate with M-DCPS for number of emergency power receptacles locations. E. Provide the emergency generator system to serve two separate branches of power and a third branch for a fire pump, if required: 1. Life safety loads, fire pump and optional stand by loads. 2. Provide separate automatic transfer and disconnect switches for each branch. F. The exhaust system for emergency generators shall be designed to prevent exhaust fumes from being drawn-back into occupied building areas or to avoid prevailing winds from disbursing exhaust fumes directly onto exterior areas such as courtyards, covered shelters or exterior P.E. areas. G. When optional standby equipment is connected to an emergency system, the optional standby load shall be coordinated with the emergency system over-current protection so that no short circuit or other malfunction of the optional system will disable any part of the life safety branch of the emergency system. The life safety system in the building shall have first priority to the optional power provided. H. Provide dedicated transfer switches for the emergency power to the following Life Safety systems shown below: 1. Fire alarm system. 2. Intercom system. 3. Emergency lighting and exit signs. 4. Fire Pumps. 5. Elevator Cab Lights and elevators (One elevator load in sequential mode during emergency conditions only). 6. Public Safety Communication System. 7. Ventilation equipment essential to life. 8. EHPA Life Safety Systems required by Code. (See M-DCPS EHPA Design Criteria for additional requirement). I. Provide dedicated transfer switches for the optional stand-by systems shown below: 1. Security System. 2. Telecommunication Systems. 3. Card Access System. 4. Security Camera Surveillance System. 5. Mechanical equipment and electrical receptacles required for the EHPA. (See EHPA Design Criteria Manual for additional requirement). 6. EMS Control Panels. 7. Cooler/Freezer and refrigerators located in Food Service areas. 8. School District owned and operated lift station. 9. Repeater equipment for School hand held radios. 10. One (1) 120V, 20-Amps receptacle in the Clinic for the refrigerator. Oct 2013 Electrical 16-13

14 11. One (1) 120V, 20-Amps receptacle in each School Police Office(s). 12. One (1) 120V, 20-Amps receptacle in the Media Center. 13. One (1) 120V, 20-Amps receptacle in Principal s Office. 14. One (1) 120V, 20-Amps receptacle in the Dining room. 15. One (1) 120V, 20-Amps receptacle in the Gymnasium. NOTE: M-DCPS District Communication Management Center (DCOM) shall be alerted automatically by way of a dedicated telecommunication line when the above Life Safety systems transfer to emergency power. J. Emergency generators for new construction projects shall be powered by natural gas if available and reliable, except as noted below: 1. Consider liquefied petroleum gas (LPG) or compressed natural gas (CNG) stored in onsite aboveground tanks, if natural gas service is unreliable or unavailable in the area. Verify reliability with the gas company serving the site. 2. Provide a 2 hour on-premise fuel supply at 100% load capacity for non-ehpa schools. 3. The use of fuel oil is not accepted by M-DCPS for new construction, except at Facilities classified as an EHPA. 4. Underground fuel tanks are not allowed. 5. See Division 15 of the M-DCPS Design Criteria for additional requirements on fuel tanks. K. At facilities classified as EHPA, provide an emergency generator to comply with applicable Codes and requirements of M-DCPS - EHPA Design Criteria. L. Loads on emergency power shall be hard wired and the entire emergency distribution system shall be completely independent and separated from the normal power distribution system. Electrical panels on the emergency system shall be labeled and painted according to specifications. Provide surge suppression devices for power distribution equipment as noted below: 1. Normal and emergency main entrance equipment. 2. All distribution and branch circuit panels for computer loads and electronic lighting and security camera system. M. The emergency power shall be supplied by an emergency generator package consisting of an alternator coupled to an internal combustion motor, automatic transfer switch, battery charger, batteries, day tank, exhaust/muffler (critical grade silencers) and main breaker(s). N. Installation of emergency generator and fuel supply shall meet requirements of National Electrical Code Article 700 and NFPA-110, Standard for Emergency and Optional Standby Generator. O. Total load on the new generator shall not exceed 80% of the generator rated capacity. P. The intercom, telephone, and facility management systems shall each have dedicated backup power sources to operate the system. These low voltage systems are not part of the general electrical scope of work of Division 16. See Division 13 of the M-DCPS Design Criteria for additional details. Oct 2013 Electrical 16-14

15 Q. Provide emergency lighting, in addition to normal power lighting, in accordance with NFPA-101 and in the following areas: 1. Teacher workrooms and large storage rooms capable of being used by study groups. 2. All rooms with electrical equipment. R. In facilities without an emergency generator package, provide exit lights and emergency LED or fluorescent lighting fixtures with self-contained batteries for automatic backup. In renovation projects where the use of fluorescent lighting fixtures may not be feasible, use LED or halogen emergency lighting units with similar backup features. S. Transfer switch loads shall be grouped according to FBC, NEC-700 and 701 for emergency loads and NEC-702 for optional standby equipment: T. Locate the emergency generator and automatic transfer switches in a dedicated, two hour fire rated room with doors opening directly to the outside. Provide generator room with emergency lighting connected to the generator and a wall pack battery light connected to room emergency circuit ahead of room lighting switch. U. Emergency system overcurrent devices shall be selectively coordinated with 0.1 second response time. A/E shall submit a signed and sealed letter to the Building Code Consultant (BCC) certifying that installed emergency power system is a selectively coordinated system and meets the requirements of NEC Article 700 and M-DCPS Design Criteria. V. Spaces with unit equipment emergency lights shall utilize wall pack battery lights connected to local lighting circuit ahead of any switching. W. Provide battery backup for the fire alarm panel per NFPA-72 requirements. X. Emergency generator installation shall conform with all applicable Codes and standards, including permits that may be required by agencies having jurisdictions (AHJ) including DERM. 1.6 FIRE ALARM DETECTION SYSTEM A. Provide a single stand-alone or multiple panel network type fire alarm system for the entire facility. Fire alarm system shall be capable of interfacing with the M-DCPS District Communication Management Center (DCOM), located at the School Board Administration Building. B. At a new facility, all stand-alone buildings shall be connected to a common fire alarm system. C. At a new addition, the fire alarm serving the new addition shall be connected to the fire alarm system serving the existing facility unless the A/E can clearly substantiate, to the satisfaction of M-DCPS Facilities Design and Standards, that such installation is not feasible. A/E shall request written approval from M-DCPS Facilities Design and Standards prior to specifying a separate, stand-alone fire alarm system for any new additions. A/E shall look at the feasibility of upgrading the existing fire alarm panel, to a network base system, and thus interconnect the existing fire alarm control panel and the new addition control Oct 2013 Electrical 16-15

16 panel. If written approval is granted to provide a stand-alone fire alarm system at the new addition, the scope for the new stand-alone fire alarm shall include the following: 1. Adjacent to the fire alarm panel of the new addition, provide a red flashing strobe that is connected to the fire alarm panel of the main building. Adjacent to this strobe provide a plastic sign having white letters on red background stating THIS STROBE IS CONNECTED TO THE FIRE ALARM PANEL AT THE MAIN BUILDING 2. Adjacent to the fire alarm panel at the existing facility, provide a red flashing strobe that is connected to the fire alarm panel of the new addition. Adjacent to this strobe, provide a plastic sign having white letters on red background stating THIS STROBE IS CONNECTED TO THE FIRE ALARM PANEL AT THE NEW ADDITION. D. Fire alarm systems shall be powered by dedicated circuits from emergency panels according to Florida Building Code (FBC), NFPA 70 and NFPA 72. E. Design of Fire Alarm System shall comply with: 1. FBC National Electrical Code, (NFPA 70). 3. National Fire Alarm Code, (NFPA 72). 4. NFPA 90A, 90B, and Underwriters Laboratories (UL) or other OSHA approved Nationally Recognized Testing Laboratories (NRTL). 6. NFPA Life Safety Code. 7. Florida Fire Prevention Code. F. The fire alarm system shall be addressable, with system printer, wired in dedicated conduits, and electronically supervised. 1. It shall be complete with control, detection, notification, and initiation devices, connected to a control/annunciator panel with command and control function capability. 2. Provide a digital alarm communicator transmitter (DACT) that is listed by an OSHA approved Nationally Recognized Testing Laboratory (NRTL), for fire protective signaling systems. G. Provide transient surge/lightning protection to the fire alarm system. Fire alarm systems shall have lightning/surge protection modules installed on the input (power supply) side and on each of the output circuits/loops including alarm initiating and reporting devices. H. Verify code requirements for upgrading the fire alarm system when adding to, or revising, components of an existing fire alarm system. Provide all new devices compatible with the existing manufacturer s fire alarm system. I. Fire alarm system and fire alarm components shall be listed for commercial use. Fire alarm system and components listed for residential use are not allowed. J. Fire alarm system shall include, but not be limited to the following: 1. Automatic detection devices, including smoke detectors, heat detectors, etc. 2. Power supplies, including back-up batteries required to meet NFPA 72. These devices shall be listed by an OSHA approved Nationally Recognized Testing Laboratory. 3. Electronic components including transponders, conventional zone modules, interface modules, and printers. Oct 2013 Electrical 16-16

17 4. Control Devices: Relays, switches, etc. 5. Zone Map: Professionally plotted in color, minimum 24" x 36", laminated and framed, using a minimum scale of 1 inch = 20 feet, wall mounted in the vicinity of main fire alarm control panel and at any other remote annunciator panel location. Zone map(s) shall clearly and legibly identify all individual devices with addresses and room numbers, including all NAC panels and end-of-line resistors. 6. Pull stations: a. Locate manual pull stations as required by FBC and NFPA Standards. b. Provide a manual pull station next to each administrative intercom telephone called for under Division 13 - Intercom and Clock/Bell section of M-DCPS Design Criteria. These locations are as follows: 1) One (1) in the principal s office. 2) One (1) in the administration secretarial area adjacent to the fire alarm panel. 3) One (1) at the media center adjacent to the intercom console. 4) If the facility is an Enhanced Hurricane Protected Area (EHPA), provide one (1) pull station within the EHPA Manager s Office. c. Pull stations shall be provided with transparent impact resistant protective covers. d. At new construction, provide recessed pull stations, when allowed by wall conditions, according to manufacturer s requirements. 7. In non-ehpa facilities, locate the main fire alarm panel and area zone map in a visible location of the main administration secretarial area. 8. In EHPA facilities, the main fire alarm control panel shall be located at the designated EHPA Manager s Office, with a remote annunciator panel located in the main administration area. Refer to M-DCPS EHPA Design Criteria for additional details. 9. Drill switches are not allowed. 10. Conduit system, including raceways, junction boxes, wiring, and accessories: a. Wiring shall be distributed throughout the facility in dedicated raceways. 1) Paint box covers orange. 2) Wiring shall comply with NEC 760, NFPA 72 and fire alarm equipment manufacturer s wiring requirements and specifications. 3) Wiring shall be power-limited fire protective signal circuit cable or conductors. b. Fire Alarm Circuit shall be Class B according to NFPA 72. c. Splicing of fire alarm initiation & notification circuit conductors shall only be done for connection of fire alarm devices or inside wall mounted terminal cabinets on terminal strips. All circuit conductors shall have wire markers with corresponding typewritten wiring schedule inside enclosure. Fire alarm circuit initiation & notification conductors shall not be spliced underground. d. T tapping of addressable data circuits shall only be done when necessary to meet system manufacturer s maximum impedance requirements. T taps shall only be done inside wall mounted terminal cabinets on terminal strips. All circuit conductors shall have wire markers with corresponding typewritten wiring schedule inside enclosure. e. The input AC power for the fire alarm control panel and DACT shall be from a dedicated branch circuit of the facility emergency backup system. Outside the enclosure identify the panel and label the breaker with WARNING A.C. POWER TO FIRE ALARM SYSTEM. DO NOT TURN OFF OR DISCONNECT. Oct 2013 Electrical 16-17

18 f. Cable at wet locations shall comply with NEC 760 Power Limited Standards and manufacturer s low capacitance requirements. 11. Communications software, hardware, and programming. K. Where Codes allow smoke detector or heat detector, provide heat detector to minimize false alarms. 1. Provide ceiling mounted smoke detectors in media center reading room/stacks, student records room, and stage. 2. Provide heat detector in group restrooms. 3. Provide weatherproof horns/strobes near every main exit door (exit from the building, not exit from a single space) on the exterior of the buildings. 4. Provide a wire guard for fire alarm horns/strobes in gym. 5. Heat and smoke detectors shall not be located in a direct air-flow or closer than 3 feet from a supply air or return air diffuser. 6. The activation of the facility's fire alarm system shall not activate the NFPA 96 exhaust hood fire suppression system; however the activation of the hood s system shall activate the facility s fire alarm system. 7. Provide surge protection devices on the following: a. All wires that enter and leave the fire alarm control panels and booster panels. b. All wires that enter and leave the buildings. c. All 120V dedicated power circuits serving the fire alarm control panels and booster panels. 8. Fire alarm system shall comply with the State Fire Marshal Rule 69A Fire alarm shut-down relay(s) shall be located next to the fan controller. 10. EMS shut down of the fans for fire alarm shut down is not acceptable. 11. When a fire pump is installed at a facility, the fire alarm control panel shall monitor fire pump fail, fire pump run, and fire pump phase reversal. 12. Provide high temperature heat detector in the emergency generator room and in kiln rooms. 13. All fire alarm devices in open-air areas exposed to exterior elements shall be weatherproof. 14. Provide fire alarm pull station by the exit doors to stairs on upper floors. 15. Provide integral re-chargeable battery back-up for the fire alarm system. L. The control-switch for silencing the building horns shall be allowed only if it is key-operated or located in a locked cabinet and if it transfers the alarm indication to a visual indicator and allows subsequent alarm signals. M. A general alarm shall activate all horns and visual alarms according to applicable codes. Strobes shall be non-silenceable. N. Protective Covers: 1. Provide a clear polycarbonate protective cover, that is listed by an OSHA approved NRTL, on all smoke detectors located below 8-6" AFF, and all pull stations, horns and horn/strobes, except those located within staff restrooms, teachers lounge, and staff offices located in the administration and student services areas. O. Addressable device ID locations shall match actual site room number and door labels. Oct 2013 Electrical 16-18