SECTION 16170

GROUNDING AND BONDING

PART 1 GENERAL

SECTION INCLUDES

Grounding electrodes and conductors.

Equipment grounding conductors.

Bonding.

RELATED SECTIONS

Section 02781 - Site Grounding

Section 03200 - Concrete Reinforcement.

Section 03300 - Cast-In-Place Concrete.

Section 16670 - Lightning Protection System.

REFERENCES

ANSI/NFPA 70 - National Electrical Code.

NPFA 99 - Health Care Facilities.

GROUNDING ELECTRODE SYSTEM

[Existing] Metal underground water pipe.

Metal frame of the building.

Concrete-encased electrode.

Ground ring specified in Section 02781.

[Existing] Metal underground gas piping system.

Rod electrode.

Plate electrode.

Active electrode.

[___________________________________________________].

PERFORMANCE REQUIREMENTS

Grounding System Resistance: [5] [25] [___] ohms.

SUBMITTALS

Submit under provisions of Section [01300] [_____].

Product Data: Provide data for grounding electrodes and connections.

Test Reports: Indicate overall resistance to ground [and resistance of each electrode].

Manufacturer's Instructions:	Include instructions for storage, handling, protection, examination, preparation and installation of exothermic connectors.

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700] [_____].

Accurately record actual locations of grounding electrodes.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing Products specified in this Section with minimum [three] [_____] years [documented] experience.

REGULATORY REQUIREMENTS

Conform to requirements of ANSI/NFPA 70.

Furnish products listed and classified by [Underwriters Laboratories, Inc.] [testing firm acceptable to authority having jurisdiction] as suitable for purpose specified and shown.

PART 2 PRODUCTS

ROD ELECTRODE

Manufacturers:

[______________________________] Model [__________].

[______________________________] Model [__________].

[______________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Material: [Copper] [Copper-clad steel].

Diameter: [1/2] [3/4] [___] inch ([13] [19] [___] mm).

Length: [5] [8] [10] [___] feet ([1.5] [2.4] [3] [___] m).

ACTIVE ELECTRODES

Manufacturers:

[______________________________] Model [__________].

[______________________________] Model [__________].

[______________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Description: [________________________________________].

MECHANICAL CONNECTORS

Manufacturers:

[______________________________] Model [__________].

[______________________________] Model [__________].

[______________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

Material: Bronze.

EXOTHERMIC CONNECTIONS

Manufacturers:

[______________________________] Model [__________].

[______________________________] Model [__________].

[______________________________] Model [__________].

Substitutions: Under provisions of Section [01600] [_____].

WIRE

Material: Stranded copper.

Foundation Electrodes:	[2/0] [2] [___] AWG.

Grounding Electrode Conductor: Size to meet NFPA 70 requirements.

GROUNDING WELL COMPONENTS

Well Pipe: 8 inch (200 mm) diameter by 24 inch (600 mm) long [clay tile] [concrete] pipe with belled end.

Well Cover: Cast iron with legend "GROUND" embossed on cover.

PART 3 EXECUTION

EXAMINATION

Verify that final backfill and compaction has been completed before driving rod electrodes.

INSTALLATION

Install Products in accordance with manufacturer's instructions.

Install rod electrodes at locations indicated. [Install additional rod electrodes as required to achieve specified resistance to ground.]

Provide grounding well pipe with cover at [each rod location] [rod locations where indicated]. Install well pipe top flush with finished grade.

Install [4] [__] AWG bare copper wire in foundation footing [where indicated].

****** [OR] ******

Provide grounding electrode conductor and connect to reinforcing steel in foundation footing [where indicated]. [Bond steel together].

Provide bonding to meet Regulatory Requirements.

Bond together metal siding not attached to grounded structure; bond to ground.

Bond together reinforcing steel and metal accessories in [pool] [and] [fountain] structures.

Install transient suppression plate [where indicated] [______________________________].

Install ground grid under access floors [where indicated]. Construct grid of [2] [__] AWG bare copper wire installed on 24 inch centers both ways. Bond each access floor pedestal to grid.

Bond together each metallic raceway, pipe, duct and other metal object entering [space under access floors] [___________________________________]. [Bond to underfloor ground grid.] Use [2] [__] AWG bare copper conductor.

Provide isolated grounding conductor for circuits supplying [electronic cash registers] [, personal computers] [and] [______________________________].

Provide grounding and bonding in patient care areas to meet requirements of NFPA 99 and ANSI/NFPA 70.

Equipment Grounding Conductor: Provide separate, insulated conductor within each feeder [and branch] circuit raceway. Terminate each end on suitable lug, bus, or bushing.

INTERFACE WITH OTHER PRODUCTS

Interface with site grounding system installed under Section 02781.

Interface with lightning protection system installed under Section 16670.

FIELD QUALITY CONTROL

Inspect grounding and bonding system conductors and connections for tightness and proper installation.

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