260526 01-17 GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS.docx
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- Solicitation number
- 36C25621R0013
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This document contains a federal solicitation for a construction project to remodel a pharmacy to meet USP 800 requirements. The project includes remodeling the current pharmacy compounding area and building out a new segregated compounding area as a backup at the Southeast Louisiana Veterans Health Care System facility. The construction project has an estimated value between $1,000,000 to $5,000,000. The solicitation is a 100% set-aside for Service-Disabled Veteran-Owned Small Businesses, who must be verified through the VetBiz Vendor Information Pages. Offerors must also be registered in the System for Award Management database. The solicitation was issued by the Department of Veterans Affairs Veterans Health Administration Veterans Integrated Service Network 16.
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Renovate Pharmacy for USP 800 01-01-17 VAMC New Orleans, LA
SECTION 26 05 26
GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS
PART 1 GENERAL
1.1 DESCRIPTION
| A. | This section specifies the furnishing, installation, connection, and testing of grounding and bonding equipment, indicated as grounding equipment in this section. |
| B. | “Grounding electrode system” refers to grounding electrode conductors and all electrodes required or allowed by NEC, as well as main, supplementary, and lightning protection system grounding electrodes. |
| C. | The terms “connect” and “bond” are used interchangeably in this section and have the same meaning. |
1.2 RELATED WORK
| A. | Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS: Requirements that apply to all sections of Division 26. |
| B. | Section 26 05 19, LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES: Low-voltage conductors. |
| C. | Section 26 05 33, RACEWAY AND BOXES FOR ELECTRICAL SYSTEMS: Conduit and boxes. |
1.3 qualITY ASSURANCE A. Quality Assurance shall be in accordance with Paragraph, QUALIFICATIONS (PRODUCTS AND SERVICES) in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS.
1.4 SUBMITTALS
| A. | Submit in accordance with Paragraph, SUBMITTALS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS, and the following requirements: |
| 1. | Shop Drawings: Submit sufficient information to demonstrate compliance with drawings and specifications. |
| 2. | Certifications: Certification by the Contractor that the grounding equipment has been properly installed and tested. |
1.5 APPLICABLE PUBLICATIONS
| A. | Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by designation only. |
| B. | American Society for Testing and Materials (ASTM): |
| B1-2013(R2018) | Standard Specification for Hard-Drawn Copper Wire |
| B3-2013(R2018) | Standard Specification for Soft or Annealed Copper Wire |
| B8-2011(R2017) | Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft |
| C. | National Fire Protection Association (NFPA): |
| 70-2017 | National Electrical Code (NEC) |
| 70E-2018 | Standard for Electrical Safety in the Workplace |
| 99-2018 | Health Care Facilities Code |
| D. | Underwriters Laboratories, Inc. (UL): |
| 44-2018 | ThermosetInsulated Wires and Cables |
| 83-2017 | ThermoplasticInsulated Wires and Cables |
| 467-2013(R2017) | Grounding and Bonding Equipment |
PART 2 PRODUCTS
2.1 GROUNDING AND BONDING CONDUCTORS
| A. | Equipment grounding conductors shall be insulated stranded copper, except that sizes No. 10 AWG and smaller shall be solid copper. Insulation color shall be continuous green for all equipment grounding conductors, except that wire sizes No. 4 AWG and larger shall be identified per NEC. |
| B. | Bonding conductors shall be bare stranded copper, except that sizes No. 10 AWG and smaller shall be bare solid copper. Bonding conductors shall be stranded for final connection to motors, transformers, and vibrating equipment. |
| C. | Conductor sizes shall not be less than shown on the drawings, or not less than required by the NEC, whichever is greater. |
| D. | Insulation: THHN-THWN and XHHW-2. |
2.2 ground connections
| A. | Above Grade: |
| 1. | Bonding Jumpers: Listed for use with aluminum and copper conductors. For wire sizes No. 8 AWG and larger, use compression-type connectors. For wire sizes smaller than No. 8 AWG, use mechanical type lugs. Connectors or lugs shall use zinc-plated or cadmium-plated steel bolts, nuts, and washers. Bolts shall be torqued to the values recommended by the manufacturer. |
| 2. | Connection to Building Steel: Exothermic-welded type connectors. |
| 3. | Connection to Grounding Bus Bars: Listed for use with copper conductors. Use mechanical type lugs, with zinc-plated or cadmium-plated steel bolts, nuts, and washers. Bolts shall be torqued to the values recommended by the manufacturer. |
| 4. | Connection to Equipment Rack and Cabinet Ground Bars: Listed for use with aluminum and copper conductors. Use mechanical type lugs, with zinc-plated or cadmium-plated steel bolts, nuts, and washers. Bolts shall be torqued to the values recommended by the manufacturer. |
2.3 equipment rack and cabinet ground bars A. Provide solid copper ground bars designed for mounting on the framework of open or cabinet-enclosed equipment racks. Ground bars shall have minimum dimensions of 6.3 mm (0.25 inch) thick x 19 mm (0.75 inch) wide, with length as required or as shown on the drawings. Provide insulators and mounting brackets.
2.4 ground terminal blocks A. At any equipment mounting location (e.g., backboards and hinged cover enclosures) where rack-type ground bars cannot be mounted, provide mechanical type lugs, with zinc-plated or cadmium-plated steel bolts, nuts, and washers. Bolts shall be torqued to the values recommended by the manufacturer.
PART 3 EXECUTION
3.1 GENERAL
| A. | Installation shall be in accordance with the NEC, as shown on the drawings, and manufacturer’s instructions. |
| B. | System Grounding: |
| 1. | Secondary service neutrals: Ground at the supply side of the secondary disconnecting means and at the related transformer. |
| 2. | Separately derived systems (transformers downstream from the service entrance): Ground the secondary neutral. |
| C. | Equipment Grounding: Metallic piping, building structural steel, electrical enclosures, raceways, junction boxes, outlet boxes, cabinets, machine frames, and other conductive items in close proximity with electrical circuits, shall be bonded and grounded. |
| D. | For patient care area electrical power system grounding, conform to NFPA 70 and NFPA 99. |
3.2 SECONDARY voltage EQUIPMENT AND CIRCUITS
| A. | Panelboards and other electrical equipment: |
| 1. | Connect the equipment grounding conductors to the ground bus. |
| 2. | Connect metallic conduits by grounding bushings and equipment grounding conductor to the equipment ground bus. |
3.3 raceway
| A. | Conduit Systems: |
| 1. | Ground all metallic conduit systems. All metallic conduit systems shall contain an equipment grounding conductor. |
| 2. | Metallic conduit that only contains a grounding conductor, and is provided for its mechanical protection, shall be bonded to that conductor at the entrance and exit from the conduit. |
| 3. | Metallic conduits which terminate without mechanical connection to an electrical equipment housing by means of locknut and bushings or adapters, shall be provided with grounding bushings. Connect bushings with an equipment grounding conductor to the equipment ground bus. |
| B. | Feeders and Branch Circuits: Install equipment grounding conductors with all feeders, and power and lighting branch circuits. |
| C. | Boxes, Cabinets, Enclosures, and Panelboards: |
| 1. | Bond the equipment grounding conductor to each pullbox, junction box, outlet box, device box, cabinets, and other enclosures through which the conductor passes (except for special grounding systems for intensive care units and other critical units shown). |
| 2. | Provide lugs in each box and enclosure for equipment grounding conductor termination. |
| D. | Wireway Systems: |
| 1. | Bond the metallic structures of wireway to provide electrical continuity throughout the wireway system, by connecting a No. 6 AWG bonding jumper at all intermediate metallic enclosures and across all section junctions. |
| 2. | Install insulated No. 6 AWG bonding jumpers between the wireway system, bonded as required above, and the closest building ground at each end and approximately every 16 M (50 feet). |
| 3. | Use insulated No. 6 AWG bonding jumpers to ground or bond metallic wireway at each end for all intermediate metallic enclosures and across all section junctions. |
| 4. | Use insulated No. 6 AWG bonding jumpers to ground cable tray to column-mounted building ground plates (pads) at each end and approximately every 15 M (49 feet). |
| E. | Receptacles shall not be grounded through their mounting screws. Ground receptacles with a jumper from the receptacle green ground terminal to the device box ground screw and a jumper to the branch circuit equipment grounding conductor. |
| F. | Ground lighting fixtures to the equipment grounding conductor of the wiring system. Fixtures connected with flexible conduit shall have a green ground wire included with the power wires from the fixture through the flexible conduit to the first outlet box. |
| G. | Fixed electrical appliances and equipment shall be provided with a ground lug for termination of the equipment grounding conductor. |
3.4 corrosion inhibitors A. When making grounding and bonding connections, apply a corrosion inhibitor to all contact surfaces. Use corrosion inhibitor appropriate for protecting a connection between the metals used.
3.5 CONDUCTIVE PIPING
| A. | Bond all conductive piping systems, interior and exterior, to the grounding electrode system. Bonding connections shall be made as close as practical to the equipment ground bus. |
| B. | In operating rooms and at intensive care and coronary care type beds, bond the medical gas piping and medical vacuum piping at the outlets directly to the patient ground bus. |
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