General Construction Specifications
SECTION 16170
GROUNDING AND BONDING
PART 1 - GENERAL
1.01 SECTION INCLUDES
A. Equipment grounding conductors.
B. Bonding.
1.02 REFERENCES
A. ANSI/NFPA 70 - National Electrical Code.
1.03 GROUNDING ELECTRODE SYSTEM
A. Rod electrode.
1.04 PERFORMANCE REQUIREMENTS
A. Grounding System Resistance: 5 ohms.
1.05 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Provide data for grounding electrodes and connections.
C. Test Reports: Indicate overall resistance to ground and resistance of each electrode.
D. Manufacturer's Instructions: Include instructions for storage, handling, protection, examination, preparation and installation of exothermic connectors.
1.06 PROJECT RECORD DOCUMENTS
A. Submit under provisions of Section 01720.
B. Accurately record actual locations of grounding electrodes.
1.07 QUALIFICATIONS
A. Manufacturer: Company specializing in manufacturing Products specified in this Section with minimum three years documented experience.
PART 2 - PRODUCTS
2.01 ROD ELECTRODE
A. Manufacturers:
Copperweld Model GR588.
ITT Blackburn Model b 258.
Substitutions: Under provisions of Section 01600.
B. Material: Copper-clad steel.
C. Diameter: 3/4 inch (19 mm).
2.02 MECHANICAL CONNECTORS
A. Manufacturers:
1. Burndy Corp. SERVIT Type K.
2. O.Z. Gedney Type LG.
B. Material: Bronze.
2.03 EXOTHERMIC CONNECTIONS
A. Manufacturers:
1. Erico Products, Cadweld Type GR.
2. Burndy Corp. Thermo-Weld Type CR.
2.04 WIRE
A. Material: Stranded copper.
B. Grounding Electrode Conductor: Size to meet NFPA 70 requirements.
PART 3 - EXECUTION
3.01 EXAMINATION
A. Verify that final backfill and compaction has been completed before driving rod electrodes.
3.02 INSTALLATION
A. Install Products in accordance with manufacturer's instructions.
B. Install rod electrodes as required to achieve specified resistance to ground.
C. Provide bonding to meet Regulatory Requirements.
D. Bond together each metallic raceway at each end termination. Bond to ground grid. Use 8 AWG bare copper conductor.
E. Equipment Grounding Conductor: Provide separate, insulated conductor within each feeder and branch circuit raceway. Terminate each end on suitable lug, bus, or bushing.
3.03 FIELD QUALITY CONTROL
A. Inspect grounding and bonding system conductors and connections for tightness and proper installation.
B. Use suitable test instrument to measure resistance to ground of system. Perform testing in accordance with test instrument manufacturer's recommendations using the fall-of-potential method.
END OF SECTION
