final bid specs 09328.pdf - Freese and Nichols, Inc.

26 05 26 GROUNDING & BONDING FOR ELECTRICAL SYSTEMS
1.00 GENERAL
1.01 WORK INCLUDED
Furnish labor, materials, equipment and incidentals necessary to install a complete grounding
system in strict accordance with Article 250 of the National Electrical Code (NEC) as shown on
the drawings or as specified herein. Electrical work shall be in accordance with Section 26 05 00,
COMMON WORK RESULTS FOR ELECTRICAL.
1.02 SUBMITTALS
Submittal shall be in accordance with Section 01 33 00, SUBMITTALS and shall include:
A. Grounding materials, equipment and processes.
B. Product Data: For each type of product supplied.
C. Field quality-control test reports.
1.03 QUALITY ASSURANCE
A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70,
Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for
intended use.
B. Comply with UL 467 for grounding and bonding materials and equipment.
1.04 JOB CONDITIONS
Measure the ground grid resistance with the earth test megger and install additional ground rods
and conductors as required until the resistance to the ground conforms to National Electrical Code
requirements. Ground resistance measurement shall not exceed 5 ohms. Add ground rods as
required to bring resistance to 5 ohms and connect to grounding system.
2.00 PRODUCTS
2.01 MATERIALS
A. GROUND RODS: Copper-clad steel, having a diameter of 3/4" and a minimum length of 10'.
B. GROUND CABLES: Stranded, bare tinned copper of 98% conductivity and as specified in
Section 26 05 19, LOW VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES.
C. CONDUIT GROUND FITTINGS: Fittings for bonding ground cable to the conduit shall be FCI
Burndy Corp., type NE or Thomas & Betts No. 3951 series.
D. GROUND ROD BOXES: Precast Box with cast iron lid. Lid shall read “ground rod” on lid.
Brooks Precast Model. “3-RT” or approved equal. Ground rod boxes located in driveway
areas shall have an AASHTO HS-20 rating.
E. EXOTHERMIC WELDING PROCESS: CADWELD MATERIALS – as manufactured by
ERICO products or approved equal.
Grounding & Bonding for Electrical Systems 26 05 26-1
DRP09328