1、*USACE / NAVFAC / AFCEC / NASA UFGS-28 05 26.00 40 (August 2013)-Preparing Activity: NASA SupersedingUFGS-28 05 26.00 40 (August 2010)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2013*SECTION TABLE OF CONTENTSDIVISION 28 - ELECTRONIC SAFETY AND SECURITYSECT
2、ION 28 05 26.00 40GROUNDING AND BONDING FOR ELECTRONIC SAFETY AND SECURITY08/13PART 1 GENERAL1.1 REFERENCES1.2 SUBMITTALS1.3 PREDICTIVE TESTING AND INSPECTION TECHNOLOGY REQUIREMENTS1.4 MAINTENANCE MATERIALS SUBMITTALPART 2 PRODUCTS2.1 EQUIPMENT2.1.1 Ground Rods2.1.2 Ground Wires2.1.3 Connectors And
3、 FastenersPART 3 EXECUTION3.1 BONDING AND GROUNDING3.2 INSTALLATION3.2.1 Grounding Electrodes3.2.2 Ground Grids3.2.3 Building Grounds3.2.4 Equipment Grounding3.2.5 Grounding Connections3.2.6 Bonding Materials And Methods3.2.6.1 Brazing3.2.6.2 Welding3.2.6.3 Clamping3.2.6.4 Structural Joining Methods
4、3.2.6.5 Cleaning of Bonding Surfaces3.2.6.6 Bonding Straps and Jumpers3.2.6.7 Equipment and Enclosure Bonding3.2.6.8 Bonding of Conduit and Raceway Systems3.2.6.9 Cable Tray Bonding3.2.6.10 Protection of Finished Bonds3.3 FIELD TESTS3.3.1 Bond Resistance TestSECTION 28 05 26.00 40 Page 1Provided by
5、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3.2 Ground Resistance Tests3.3.3 Ground Isolation Test3.3.4 Continuity Isolation Test3.4 CLOSEOUT ACTIVITIES- End of Section Table of Contents -SECTION 28 05 26.00 40 Page 2Provided by IHSNot for ResaleNo reprodu
6、ction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCEC / NASA UFGS-28 05 26.00 40 (August 2013)-Preparing Activity: NASA SupersedingUFGS-28 05 26.00 40 (August 2010)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2013*SECTION 28 05
7、26.00 40GROUNDING AND BONDING FOR ELECTRONIC SAFETY AND SECURITY08/13*NOTE: This guide specification covers the requirements for electrical system and equipment grounding including ground rods, grounding conductors, connectors, and other accessories. This section excludes instrumentation and static
8、grounding systems.Drawings should show plan layout of each grounding electrode, ground mat, ground grid, substation ground bus, interconnecting grounding conductor, and tap connections to steel building columns and outdoor electrical equipment. Detail drawings of ground mats and ground grids should
9、show configuration, ground rod spacings, interconnecting cable and tap connections to substation yard fence, substation ground bus, and interior equipment.When grounding systems as shown fail to achieve the desired measured resistance to ground, additional ground rods may be required.Adhere to UFC 1
10、-300-02 Unified Facilities Guide Specifications (UFGS) Format Standard when editing this guide specification or preparing new project specification sections. Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable
11、items(s) or insert appropriate information.Remove information and requirements not required in respective project, whether or not brackets are present.Comments, suggestions and recommended changes for this guide specification are welcome and should be submitted as a Criteria Change Request (CCR).*SE
12、CTION 28 05 26.00 40 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PART 1 GENERAL*NOTE: If Section 26 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS is not included in the project specification, applicable requirements therefrom should be
13、 inserted and the first paragraph deleted. If Section 05 05 23 WELDING, STRUCTURAL is not included in the project specification, applicable requirements therefrom should be inserted and the second paragraph deleted.* Section 26 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS applies to work speci
14、fied in this section.Section 05 05 23 WELDING, STRUCTURAL applies to work specified in this section.1.1 REFERENCES*NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in
15、this paragraph by organization, designation, date, and title.Use the Reference Wizards Check Reference feature when you add a RID outside of the Sections Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizards Check Reference feature to update
16、the issue dates.References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process.*The publications listed below form a part of this specification to the extent referenced. The publication
17、s are referred to within the text by the basic designation only.AMERICAN WELDING SOCIETY (AWS)AWS A5.8/A5.8M (2011; Amendment 2012) Specification for Filler Metals for Brazing and Braze WeldingASTM INTERNATIONAL (ASTM)ASTM B3 (2012) Standard Specification for Soft or Annealed Copper WireINSTITUTE OF
18、 ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)IEEE 81 (2012) Guide for Measuring Earth SECTION 28 05 26.00 40 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground SystemNATIONAL A
19、ERONAUTICS AND SPACE ADMINISTRATION (NASA)RCBEA GUIDE (2004) NASA Reliability Centered Building and Equipment Acceptance GuideNATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 70 (2011; Errata 2 2012) National Electrical CodeU.S. DEPARTMENT OF DEFENSE (DOD)MIL-STD-889 (1976; Rev B; Notice 2 1988; Noti
20、ce 3 1993) Dissimilar MetalsUNDERWRITERS LABORATORIES (UL)UL 467 (2007) Grounding and Bonding Equipment1.2 SUBMITTALS*NOTE: Review Submittal Description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project.The G
21、uide Specification technical editors have designated those items that require Government approval, due to their complexity or criticality, with a “G.“ Generally, other submittal items can be reviewed by the Contractors Quality Control System. Only add a “G” to an item, if the submittal is sufficient
22、ly important or complex in context of the project.For submittals requiring Government approval on Army projects, a code of up to three characters within the submittal tags may be used following the “G“ designation to indicate the approving authority. Codes for Army projects using the Resident Manage
23、ment System (RMS) are: “AE“ for Architect-Engineer; “DO“ for District Office (Engineering Division or other organization in the District Office); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ for Project Office. Codes following the “G“ typically are not used for Navy, Air Force, and NASA
24、projects.Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army projects.*Government approval is required for submittals with a “G“ designation; submittals not having a “G“ designation are for Contractor Quality Control SECTION 28 05 26.00
25、 40 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-approval.for information only. When used, a designation following the “G“ designation identifies the office that will review the submittal for the Government. Submit the following in accordanc
26、e with Section 01 33 00 SUBMITTAL PROCEDURES:SD-03 Product DataGrounding Systems; G; G, _Ground Rods; G; G, _Ground Wires; G; G, _Connectors and Fasteners; G; G, _Bonding Materials; G; G, _SD-06 Test ReportsBond Resistance Test; G; G, _Ground Resistance Tests; G; G, _Ground Isolation Test; G; G, _Co
27、ntinuity Isolation Test; G; G, _SD-08 Manufacturers InstructionsGrounding Systems; G; G, _SD-11 Closeout SubmittalsRecord Drawings; G; G, _1.3 PREDICTIVE TESTING AND INSPECTION TECHNOLOGY REQUIREMENTS*NOTE: The Predictive Testing and Inspection (PT&I) tests prescribed in Section 01 86 26.07 40 RELIA
28、BILITY CENTERED ACCEPTANCE FOR ELECTRICAL SYSTEMS are MANDATORY for all NASA _ assets and systems identified as Critical, Configured, or Mission Essential. If the system is non-critical, non-configured, and not mission essential, use sound engineering discretion to assess the value of adding these a
29、dditional test and acceptance requirements. See Section 01 86 26.07 40 RELIABILITY CENTERED ACCEPTANCE FOR ELECTRICAL SYSTEMS for additional information regarding cost feasibility of PT&I.*This section contains systems and/or equipment components regulated by NASAs Reliability Centered Building and
30、Equipment Acceptance Program. This program requires the use of Predictive Testing and Inspection (PT&I) technologies in conformance with RCBEA GUIDE to ensure building equipment and systems have been installed properly and contain no identifiable defects that shorten the design life of a system and/
31、or its components. Satisfactory completion of all acceptance requirements is required to SECTION 28 05 26.00 40 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-obtain Government approval and acceptance of the Contractors work.Perform PT&I tests
32、 and provide submittals as specified in Section 01 86 26.07 40 RELIABILITY CENTERED ACCEPTANCE FOR ELECTRICAL SYSTEMS.1.4 MAINTENANCE MATERIALS SUBMITTALSubmit manufacturers instructions for the grounding systems including special provisions required to install equipment components and system packag
33、es. Within special notices, detail impedances, hazards and safety precautions.PART 2 PRODUCTSSubmit material, equipment, and fixture lists for grounding systems, including manufacturers style or catalog numbers, specification and drawing reference numbers, warranty information, and fabrication site
34、information.2.1 EQUIPMENTSubmit equipment and performance data for the following items including life, test, system functional flows, safety features, and mechanical automated details.2.1.1 Ground Rods Ensure ground rods conform to the requirements of NFPA 70 UL 467 _.Use copper-clad steel ground ro
35、ds not less than 20 millimeter 3/4-inch in diameter and not less than 3000 _ millimeter 10 _-feet long per section. Ensure ground rods are clean and smooth and have a cone-shaped point on the first section Ensure rods are die-stamped near the top with the name or trademark of the manufacturer and th
36、e length of the rod in millimeters feet.2.1.2 Ground WiresEnsure ground wires are in accordance with Section 26 05 00.00 40 COMMON WORK RESULTS FOR ELECTRICAL.Ground and bond wires for substations, main panels and distribution points, and ground rod connections are annealed bare copper conforming to
37、 ASTM B3, stranded, with 98 percent conductivity. Wire size is in accordance with the grounding requirements of NFPA 70.Ground wires for equipment receptacles for non-current carrying hardware, installed in conduit is soft drawn copper, in accordance with ASTM B3, stranded, with green insulation. No
38、te wire size.2.1.3 Connectors And FastenersEnsure grounding and bonding fasteners and connectors conform to the requirements of UL 467, and Section 26 05 00.00 40 COMMON WORK RESULTS FOR ELECTRICAL.Use copper bronze grounding and bonding fasteners.SECTION 28 05 26.00 40 Page 7Provided by IHSNot for
39、ResaleNo reproduction or networking permitted without license from IHS-,-,-Use copper bonding straps and jumpers with a cross-sectional area of not less than 4.12 millimeter diameter No. 6 AWG. Bonding straps and jumpers for shock-mounted devices with pivot hinged swivel joints are made of flat tinn
40、ed-copper woven-wire braid flexible stranded wire.PART 3 EXECUTION3.1 BONDING AND GROUNDINGEnsure bonding and grounding requirements are in accordance with NFPA 70.3.2 INSTALLATION3.2.1 Grounding Electrodes*NOTE: In locations where existing underground utilities, equipment or structures may be damag
41、ed, ground rod installation should be accomplished using the water jetting method.*Grounding electrodes include ground rods installed expressly for grounding systems. Install ground rods using a water jetting procedure.Minimum ground rod section are 3000 _ millimeters 10 _-feet. Thread sections toge
42、ther and exothermically fusion weld. Install ground rods so that the top of the rod is 100 _ millimeter 4 _-inches above grade.Install ground rods so that the top of the rod is not less than 450 _ millimeter 18 _-inches below finished grade.3.2.2 Ground GridsGround grids consist of a series of groun
43、d rods installed with interconnecting grounding conductors between ground rods. Space ground rods as noted.Do not bury ground grid less than 450 _ millimeter 18 _-inches below the finish grade. Provide grounding conductors not less than 11.7 _ millimeter diameter (No. 4/0 _ AWG) No. 4/0 _ AWG and are exothermically fusion welded together at crossover points and to ground rods.3.2.3 Building GroundsGround the steel framework of the building with a driven ground rod at the base of every corner column and intermediate exterior columns at distances not greater than 18,000 _ millimeter 60 _ -f
