Bid Package 08 North Well Field - Garney Construction

Colorado River Municipal Water District
Raw Water Supply Well Sites
Ward County North Well Field
B. GROUND CABLES: Stranded, bare tinned copper of 98% conductivity. Ground wire
shall be Class B stranded tin-plated conductor without insulation in all cases where a
single ground wire is indicated to be installed in a conduit with no other conductors in the
conduit, or where the ground wire is directly buried in earth or concrete. In all other
cases, insulate ground wire with green insulator as specified for low voltage wire.
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 AASHO HS-20 rating.
E. GROUND PLATE ELECTRODES: 20 gauge copper with terminated two (2) foot
welded pigtail connection.
F. EXOTHERMIC WELDING PROCESS: CADWELD MATERIALS – as manufactured
by ERICO products or approved equal.
2.2 PROCESSES
A. All grounding system connections to building steel and ground rods shall be
exothermically welded including all cable connections, and cable steel terminations. The
use of mechanical type connectors is not acceptable.
B. All materials involved must be from the same sources to insure compatibility.
Connections made from this process shall meet the requirements of IEEE Standards 80
and 837 and as listed in MIL 419 and other standards, National Electrical Code, etc.
GROUNDING SYSTEM
C. Provide a grounding system that includes all connections and the testing of ground rods,
ground cables, ground buses, conduits, fittings, anchor supports, thermite process
materials and equipment and other materials required for a complete installation.
Grounding system shall be installed and sized in accordance with the National Electrical
Code.
PART 3 EXECUTION
3.1 INSTALLATION
A. Conductor Terminations and Connections:
1. Pipe and Equipment Grounding Conductor Terminations: Bolted/clamp type
connectors.
2. Underground Connections: Exothermically welded connectors, except at test
wells and as otherwise indicated.
3. Connections to Ground Rods at Test Wells: Exothermically welded connectors.
4. Connections to Structural Steel: Exothermically welded connectors.
B. Ground electrical work in accordance with NEC Article 250 and local codes.
May 18, 2012
Grounding & Bonding for Electrical Systems
Revision 0 26 05 26 - 2