Page 1 of General

Transcription

1 Page 1 of General 1. This section covers items common to sections of CSI s Master Format - Division Dalhousie University is certified by IBEW for new construction and all electrical contractors must IBEW Loc Please contact Facilities Management to clarify this issue for any construction work on campus. 3. Electrical supply to any new building or facility will normally be provided from the existing Dalhousie 23kV underground distribution system, and will only be supplied directly from the NS Power distribution system where this is economically justified. All primary electrical equipment supplied from the Dalhousie23kV underground distribution system must be rated for 25kV. 4. Complete installation must be in accordance with all governing standards and codes including: a. Current version of the Canadian Electrical Code CSA C22.1 b. The Canadian National Building Code c. Local building and fire regulations 5. Include in the specifications the requirement for training, in the operation and maintenance of electrical equipment, for Dalhousie engineering and maintenance personnel. 6. Identify clearly, in the project documents (i.e. in the equipment and shop manuals), any manufacturer s or contractor s warranties. Equipment warranties are to be initiated upon formal handover to Dalhousie University. 7. Obtain all necessary approvals, licenses, permits, easements, etc from the authorities having jurisdiction and provide a copy of these Dalhousie Facilities Management, prior to commencing work. 8. Notify the Engineer of changes required by any authority having jurisdiction prior to making changes. 9. Furnish the Engineer with Certificates of Acceptance from Electrical Inspection Department, on completion of the work. 10. Design all electrical systems such that the following objectives are met: a. Optimum performance and energy efficiency b. Compatibility with existing electrical equipment or systems and, other elements of the overall design c. Safe installation, operation and maintenance of equipment 11. Design all electrical systems to provide the following : a. The ability to safely maintain, repair, or replace electrical system elements while minimizing the need for outages on other systems or system elements b. The ability to readily make additions, or significantly increase their capacity, to meet future needs c. Coordination of all system elements with respect to the following parameters:

2 Page 2 of Single Line Diagrams i. Insulation levels ii. Mechanical Strength iii. Interrupting capacities iv. Protective device settings or characteristics 1. Device designations on all single line diagrams will conform to the Dalhousie University Electrical Equipment Labeling Standard. (see Facilities Management) 2. Maximum voltage and full load current rating for all electrical devices must be indicated on all single line diagrams. 3. Fault interrupting ratings of all protective devices must be indicated on all single line diagrams. 4. One copy of the building main power distribution single line diagram will be provided, under Plexiglas, in main electrical room Electric Motor Equipment and Controls 1. All motor starter, disconnect switch and MCC enclosures must be labeled as per the Dalhousie University Electrical Equipment Labeling Standard. (see Facilities Management) 2. Control wiring and associated conduit will be specified under Division 15 unless specifically shown on electrical drawings. 3. Where variable speed drives (VSD) are required, filtering devices must be installed to protect motors and drives, and to reduce unwanted power quality effects due to harmonics and switching transients ( Coyote magnetically coupled VSDs are the standard for approval) Duct Banks & Buried Cable 1. Contractor is to take necessary precautionary measures, prior to commencing any excavation, to avoid damage to any underground electrical and communication cables. In order to facilitate this the following must be clearly indicated in the design documents: a) Size and location of new underground cables and duct banks and trench details for these. b) Locations of existing buried services, i.e. power, water and sewer lines, etc. c) Electrical contractor s scope of work.

3 Page 3 of Lighting 1. Light level: target illuminance levels must conform to IESNA recommendations. 2. Offices to have a minimum average maintained illuminance level of 50 foot-candles (500 lux at desk level). 3. Provide metal halide exterior lighting for all driveways, walks, parking areas, and building perimeters. All outdoor area lighting applications are to be controlled by an astronomical time clock with battery back up and a manual by pass. Aube type standard of acceptance. 4. Illumination glare must be suppressed to suit the typical activity expected in the area being illuminated 5. Lighting equipment for interior applications will be electric discharge type, T8 or PL fluorescent, 4100 Deg Kelvin, Colour Rendition Index (CRI) 80, with electronic ballast. Common areas may include Metal halide with electronic ballast. 6. Lighting supply voltage to be 347 volts. 7. Automatic occupancy based lighting controls should be used in all large common areas and washrooms. 8. Auditorium lighting will be manually controlled through low voltage relay switching. 9. Location of light fixtures must not to interfere with preventative maintenance requirements (e.g. heat pump filter replacement). 10. Recessed fluorescent fixtures in ceiling spaces are not to extend into ceiling areas directly above stairways or stairway landings. 11. Lighting fixtures in stairwells will be installed on end or sidewalls directly above each landing, at a height not greater than 11 feet above the top surface of the stairs or stair landing. 12. Lighting fixtures in emergency exit stairwells are not to be installed in or on ceilings or walls directly above stairs. 13. Ceiling lighting in parking garages must maintain, at minimum, six inches greater ground clearance than indicated at the garage entrance. 14. All sinks and desk spaces in residence bedrooms, will have separately switched fluorescent task lighting installed directly above. 15. Provide three-way light switching for all rooms having two doors. 16. Custodial closet lights must be wall mounted c/w cage to protect lamps. 17. Blue light type security light may be required for pedestrian areas Emergency Lighting 1. Emergency lighting will be fed from the emergency services bus where there is an emergency generator installed. 2. Where there is no emergency services power available, emergency lighting will consist of appropriately sized fluorescent fixtures having special energy storage ballasts providing a minimum of 90 minutes

4 Page 4 of 8 operation in the event of power failure (Bodine ballasts are standard for approval). 3. In all cases, emergency lighting for stairways will consist of fluorescent fixtures having special energy storage ballasts, as specified in In addition to the requirements of the National Building Code the following critical areas require emergency lighting: 1. Electrical rooms 2. Server rooms 3. Mechanical rooms 4. Kitchens 16.7 Electrical Cable & Conduit 1. All electrical cables are to be copper conductor and all neutral conductors are to be oversized to minimize harmonic distortion 2. All electrical cables are to be installed in EMT raceway or cable tray, sized to allow for future cable additions. Armoured cables (e.g. Teck) may used only where permission is obtained in writing from Dalhousie Facilities Management. 3. Breaker panels are to have 30% excess capacity for future expansion. 4. Power loads are to include separate neutral for each branch circuit phase. 5. Junction boxes, electric valve/damper actuators and controllers in suspended ceilings should have a three foot working space and their location indicated on ceiling grid with suitable dot sticker. In addition they should not be located: 1. In the same tile space as sprinkler heads. 2. In ceiling space over equipment or furniture that cannot be readily moved or over sinks, counters, lab benches, etc. 6. All electrical cables, conduits and junction boxes must be labeled according to the Dalhousie University Electrical Equipment Labeling Standard. (see Facilities Management) 7. Install conduit and sleeves prior to concrete pour. Sleeves to protrude 2 inches above slab. 8. Mock ups should be used wherever practical to verify compatibility of junction box, outlet, switch, etc locations with building furniture. 9. Junction boxes for parking garage lighting and electrical installations to be flush mounted and installed prior to concrete pour Temporary Power 1. The Contractor will be responsible for supply of temporary construction power to site for all equipment, cranes, welders, other trades. 2. The Contractor will be responsible for installation and removal of all temporary lighting, upon completion of the project.

5 Page 5 of 8 3. The Contractor will be responsible for maintenance of hoarding lights to ensure safe access for pedestrians Electrical Equipment Finishes 1. Shop finish metal enclosure surfaces by application of rust resistant primer inside and outside, and at least two coats of finish enamel. 2. Exterior enclosures to be of stainless steel type. 3. Clean and touch up of shop painted equipment scratched or marred during shipment or installation, to match original paint. 4. Clean and prime exposed non-galvanized hangers, racks and fastening to prevent rusting Electrical Equipment Identification 1. All electrical equipment and panels are to be labeled with 1/8-inch lamacoid nameplates, as per Dalhousie University Electrical Equipment Labeling Standard. (see Facilities Management) 2. Wording on nameplates to be approved by the Engineer and Dalhousie University Facilities Management prior to manufacture Locations of Outlets & Switches 1. Locate outlets in accordance with Section General Requirements. 2. Align all outlets, fire alarm equipment, thermostats, etc, horizontally and vertically and center on wall panels, wall reveals,. 3. Change location of outlets as requested by the Engineer or Dalhousie Facilities Management, at no extra cost or credit, providing distance does not exceed 120 inches and the request is made before installation. 4. All outlets in common areas, hallways, auditoriums to be specification grade 5262 c/w brushed aluminum or nylon plate. 5. Locate light switches on latch side of doors Electrical Vaults & Switchgear Rooms 1. Main electrical vaults must be located on or above grade. No water lines, water drains or other sources of water are to be installed in electrical vaults or switchgear rooms, to avoid risk of flooding. 2. Electrical vaults and switchgear rooms are not to be located in parking garages, adjacent to mechanical rooms, or under: a. podium areas b. custodial closets c. washrooms d. labs e. staff lounges

6 Page 6 of 8 3. Electrical vaults and switchgear rooms are to be sized and laid out so as to allow for future expansion. 4. Electrical vaults and switchgear rooms containing transformers must not be located adjacent to areas such as classrooms, offices, etc. 5. Electrical panels and equipment must be installed in dedicated walk in electrical rooms; this equipment is not to be installed in closets. 6. All ventilation or air conditioning equipment and diffusers for electrical vaults or switchgear rooms shall be located so as to prevent water infiltration into those areas. 7. Electrical vaults and switchgear rooms shall be provided with sufficient filtered ventilation capacity, based on equipment heat loss calculations, to provide for all current and projected future installations of equipment in those areas. 8. All primary electrical vaults and electrical switchgear rooms must have the following discrete alarms monitored by the Dalhousie BAS: a. Loss of power b. Loss of emergency power c. High temperature d. High water level in electrical room 9. Room finish to include painted floors as per Division Electrical rooms are not to be used as thoroughfare to access other rooms. e.g. mechanical rooms, tunnel, etc Electrical Metering 1. Electrical energy metering must be included on the building primary distribution switchboard to measure total electrical demand and monitor power quality. The Dalhousie standard electrical energy meter is the Power Measurement, ION The meter installation must include an Ethernet connection to the Dalhousie Intranet Ancillary Systems 1. General a) Fire and security alarms are centrally monitored at Dalhousie Security Services in the McCain Building. The Engineer must ensure that the building design includes the installation of any equipment required to provide building alarms to this location; Dalhousie Facilities Management is to be consulted with regard to the design requirements. 2. Multiplex Fire Alarm a) Fire alarm system design must provide for the ability to block operation of individual, or groups of, smoke detector alarms. This is required to prevent spurious operation of smoke detector alarms due to renovation or construction activity.

7 Page 7 of 8 b) Fire alarm riser diagram to be included on the appropriate drawings. c) Building directory to be mounted adjacent to the fire alarm annunciator panel located at the main entrance, showing the location of all fire exits, fire extinguishers, sprinkler rooms and alarm devices. d) List of fire alarm zone addresses complete with device locations to be provided to Dalhousie Facilities Management, in paper or electronic form, by the Contractor. e) All fire alarm modules for sprinkler supervision to be identified as such and labeled appropriately. f) All air handler and gas supplied systems to be shutdown when alarm is activated. g) All electrical rooms & mechanical rooms to be provided with separately zoned thermal detectors. h) All fir alarm devices located above suspended ceilings must be identified on ceiling grid by an approved LED indicator. i) Fire alarm system and fire suppression required in server room areas. j) Fire alarm system batteries are to have ten year warranty. 2. Security and Access Control a. Building security and access control monitoring system will be provided by Dalhousie Facilities Management. b. Specifications for electrical door strike or lock hardware, door contacts, request to exit sensors and all security sensors will be provided by Dalhousie Facilities Management. c. Dedicated hardwired power circuits will be required for all security and access control panels. d. All control wiring for these systems must be installed in raceways and should have compatible cable rating if installed in cable tray that contains communications wiring. e. Refer to Division 8, door schedule section to ensure compatibility with door hardware, accessibility installations Load Balance 1. Measure phase current to panel boards with normal loads (including lighting) operating at time of acceptance. Adjust branch circuits to obtain best balance of current between phases and record changes. 2. Measure phase voltages at loads and adjust transformer taps to within 2% of rated voltage of equipment. 3. Submit, at completion of work, report listing phase and neutral currents on all panel boards, dry core transformers and motor control centres, while operating under normal load. State hour and date on which measurements

8 Page 8 of 8 were taken and, all phase to phase and phase to neutral voltages at time of test Electrical Coordination Study 1. The Engineer is to provide an electrical coordination study for the project as outlined below: a. Study must encompass all system components from the utility supply point through to and including the new 600-volt switchboard. b. Study must include i. All pertinent data for the installed equipment ii. Short circuit analysis iii. Settings for all relays and protective devices from the Utility Supply to the largest downstream device on all the feeder secondary distribution levels. iv. A report, including coordination diagrams, fuse data and protective device settings 2. The Engineer must ensure that the settings determined from the Coordination Study are correctly applied to all installed protective devices Electrical Shutdowns 1. All electrical shutdowns shall be coordinated with the Project Manager and require three weeks notice to Dalhousie University Facilities Management. 2. Switching procedures for all shutdowns will be approved by Dalhousie Facilities Management and the Contractor performing the work