SOW - Doc D3 - D50 ELECTRICAL.docx
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- N4425526P7000
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This document is a detailed Statement of Work (SOW) for electrical services and systems, specifically focusing on D50 Electrical requirements for a federal construction project. The SOW provides comprehensive specifications for interior electrical wiring, lighting, communications, and security systems, mandating energy-efficient solutions such as LED and compact fluorescent lighting, separate power and lighting circuits, and ground conductor requirements. Key technical specifications include using electrical metal conduits, minimum No. 12 AWG copper wires, ground fault interrupt (GFI) protected receptacles in wet areas, and dedicated circuits for various equipment like telecommunications, security systems, and office equipment.
The SOW further outlines detailed requirements for outlet placement, including provisions for mechanical equipment, office spaces, conference rooms, corridors, and exterior locations, with specific guidelines on receptacle spacing, circuit load limits, and protection standards. Additional electrical system components are addressed, such as telecommunications systems, public address systems, intrusion detection systems, and provisions for potential future installations like surge protective devices, variable frequency drives, emergency generators, and photovoltaic systems. The document emphasizes compliance with standards like NFPA 70 and provides guidance for designers on selecting and specifying electrical infrastructure components.
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D50 ELECTRICAL
D5010 ELECTRICAL SERVICE & DISTRIBUTION
Provide interior electrical wiring, fixtures, switches, outlets, and apparatus in accordance with applicable codes and standards. The electrical system must conform to NFPA 70. Power and lighting circuits must be separate.
1. Wiring: All wiring must be in electrical metal conduits and must be concealed except in the industrial spaces and at locations indicated in SOW paragraph 2.3, Scope of Work. No conductors are permitted to be smaller than No. 12 AWG, copper wires. Wiring below slab or underground must be in Schedule 40 PVC with ground wire. Exposed conduits on the exterior of the building are prohibited. Provide a ground conductor for each circuit; conduits must not be used as the sole means of grounding. Cable assemblies Types AC, MC, or MI and flat conductors may only be used in locations allowed by UFC 3-520-01. Circuit breakers must be bolt-on type. Series rated circuit breakers and fusible panelboards must not be used.
2. Outlet Circuits Lighting and convenience outlets must be on separate circuits. Install GFI protected receptacles at all wet or damp areas. Location of outlets must be as required by applicable codes and standards. Provide extra outlets for maintenance and service staffs in spaces such as corridors, hallways and other public spaces as identified below. All exterior outlets must be on separate circuits, be GFI protected, and equipped with a cover to prevent accidental water infiltration into the devices.
In addition to the location requirements specified by NFPA 70, locate general purpose and dedicated outlets in accordance with the following:
| a. | Mechanical equipment: Provide receptacle within 7.6 m (25 ft) of mechanical equipment on the interior and exterior of buildings. |
| b. | Office, staff support spaces, and other workstation locations: One receptacle for each workstation with a minimum of one for every 3050 mm (10 ft) of wall space. When less than 3500 mm (10 ft) of wall at the floor line, provide a minimum of two receptacles spaced appropriately to anticipate furniture relocations. Limit loads to a maximum of four workstations per 20 amp circuit. See Appendix C, Table C1 for workstation load data. |
| c. | Conference rooms and training rooms: One for every 3.6 m (12 ft) of wall space at the floor line. Ensure one receptacle is located next to each voice/data outlet. Provide one receptacle above the ceiling to support video projection device. Extend circuit to wall location for connection to motorized screen. When it is expected that a conference room table will be specifically dedicated to floor space in a conference room, locate a floor-mounted receptacle under the table. This receptacle may be part of combination power/communications outlet. |
| d. | Provide power outlets throughout the building to serve all proposed equipment, including government furnished equipment, and allow for future reconfiguration of equipment layout. Provide power connections to all ancillary office equipment such as printers, faxes, plotters, and shredders. Provide dedicated circuits where warranted. |
| e. | In each telecommunications room provide a dedicated 20 amp circuit with a receptacle adjacent to each rack or backboard for each of the following: |
1) CCTV for training systems
2) CCSTV for security systems
3) CATV
4) Voice systems
5) Data systems.
| f. | Provide dedicated receptacles as required throughout the facility for television monitors. These outlets will typically be located at the ceiling level for wall mounted television monitors. |
| g. | Provide dedicated receptacles as required throughout the facility for tape players and disc players. |
| h. | Corridors: One every 15 m (50 ft) maximum with a minimum of one per corridor. |
| i. | Janitor's closet and toilet rooms: One GFI receptacle per closet. Provide GFI receptacles at counter height for each counter in toilets such that there is a minimum of one outlet for each two sinks. |
| j. | Space with counter tops: One for every 1.200 m (4 ft) of countertop, with a minimum of one outlet. Provide GFI protection of outlets when located within 1.8 m (6 ft) of plumbing fixtures. |
| k. | Building exterior: One for each wall, GFI protected and weatherproof. |
| l. | Kitchen non-residential: One for each 3.05 m (10 ft) of wall space at the floor line. Provide GFI protection when located within 1.8 m (6 ft) of plumbing fixture. |
| m. | Child occupied spaces (including toilets): One for every 3.6 m (12 ft) of wall space. Use child safety type such as those that require rotating an integral surface cover plate to access current. Removable caps and plugs are not acceptable. |
| n. | All other rooms: One for every 7.6 m (25 ft) of wall space at the floor line. When 7.6 m (25 ft) or less of wall at the floor line exists in a room, provide a minimum of two receptacles spaced appropriately to anticipate furniture relocations. |
| o. | Special purpose receptacles: Designer of Record must coordinate with the user to provide any special purpose outlets required. Provide outlets to allow connection of equipment in special use rooms. |
3. Service Entrance Equipment: When a switchboard or switchgear is required, the Designer of Record must utilize UFGS Section 26 23 00, Low Voltage Switchgear or UFGS 26 24 13 Switchboards, for the project specification, and must submit the edited specification section as a part of the design submittal for the project.
D5020 LIGHTING & BRANCH WIRING
| 1. | Lighting Fixtures: All lighting fixtures must be energy conservation compact fluorescent or Light Emitting Diode (LED)except where indicated by Part 3. |
| a. | Fixtures for Administrative and Commercial Spaces: For offices, commercial and administrative spaces and facilities provide high efficiency ballast, and instant or rapid start recessed fluorescent fixtures or LED fixtures. |
| b. | Three-Way and Four-Way Switches: Provide three-way or four-way switching of light fixtures as necessary to facilitate movement between adjacent spaces to allow efficient energy management. |
| 2. | Exterior Lighting Fixtures for Large Open Areas: Exterior lighting fixtures for large open areas such as parking lots, streets and playgrounds must be energy efficient High-Intensity Discharge (HID) or compact fluorescent fixtures and must comply with local regulations regarding low lighting levels to avoid light pollution. |
| a. | Photocell Overriding Switch: Provide photocell-overriding switch for all outdoor light fixtures. |
D5030 COMMUNICATIONS & SECURITY
1. Telecommunications Systems: Provide a horizontal distribution system including, but not necessarily limited to, all wiring, pathway systems, connector blocks, protectors for all copper service entrance pairs, terminators for all fiber optic cables, outlet boxes, telephone jacks, and data jacks cover plates in accordance with EIA/TIA standards. Provide Category 6 UTP telephone premise wiring where telephones are required.
2. Public Address Systems: Provide a Public Address system with speakers in all locations identified in Part 3.
3. Intercommunications Systems: Provide an Intercommunication System to allow two-way communications between all locations identified in Part 3.
4. Television Systems: Provide television systems to the extent specified in Part 3. Coordinate with the local Cable Company, Local users and Local Authority at the Activity for other specific requirements. The interior cable outlets and wiring must be complete and ready for use. Wiring must not be run exposed on any surface of the building.
5. Security Systems: Provide an Intrusion Detection System (IDS) to sense all perimeter doors and windows and the interior volume in at least two locations. System must have a minimum 90-minute battery back-up and annunciate both locally and at the Base Security Office via a telephone dialer. System must have entry/exit timer. Provide wall mounted keypad control at two locations.
D5090 OTHER ELECTRICAL SERVICES
1. Surge Protective Device (SPD): Provide SPD in accordance with UFC 3-501-01, Electrical Engineering.
2. Variable Frequency Drives: When variable frequency drives are required, the Designer of Record must utilize UFGS Section 26 29 23 for the project specification, and must submit the edited specification section as a part of the design submittal for the project.
3. Emergency Generators: When an emergency generator is required, the Designer of Record must utilize UFGS Section 26 32 15.00 for the project specification, and must submit the edited specification section as a part of the design submittal for the project.
4. Automatic Transfer and Bypass/Isolation Switches: When an Automatic Transfer Switch is required, the Designer of Record must utilize UFGS Section 26 36 23 for the project specification, and must submit the edited specification section as a part of the design submittal for the project.
5. Uninterruptible Power Supply (UPS) System: When a UPS system is required, the Designer of Record must utilize UFGS Section 26 33 53 and must submit the edited specification section as a part of the design submittal for the project.
6. 400 Hertz Systems: The Designer of Record must utilize UFGS Section 26 35 43 for the project specification, and must submit the edited specification section as a part of the design submittal for the project.
7. Lightning Protection: When lightning protection is required, the Designer of Record must utilize UFGS Section 26 41 00 for the project specification, and must submit the edited specification section as a part of the design submittal for the project.
8. Building Photovoltaic System: When a PV system is required, the Designer of Record must utilize UFGS Section 26 31 00 for the project specification, and must submit the edited specification section as part of the design submittal for the project.
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