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

2.02 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 connections is not acceptable.
B. Any concealed connection (buried, encased in concrete or otherwise sealed) shall be done
only with exothermic welds.
C. 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.
2.03 GROUNDING SYSTEM
Provide a complete 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.
3.00 EXECUTION
3.01 INSTALLATION
A. Conductor Terminations and Connections:
1. Pipe and Equipment Grounding Conductor Terminations: Bolted/clamp type connectors.
2. Underground Connections: Exothermically welded connectors,
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.
C. Install ground cables in conduits above grade or directly buried in earth to a depth of not less
than 12" below grade. Installation to provide sufficient mechanical protection so as not to
break ground cables or connections. If ground cables are exposed, run in conduits for added
protection.
D. Install ground cables continuously between connections. Splices shall not be permitted,
except where indicated on the plans. Where ground cables pass through floor slabs.
buildings, etc., and when not in metallic enclosures, provide a sleeve of approved, nonmetallic
materials.
E. Install a green-colored, equipment grounding conductor in raceways. Size conductors in
accordance with NEC Article 250.
F. Where ground wire is directly buried in earth or concrete, use standard bare tinned copper
cable, in all other cases install a green-colored insulation, equipment grounding conductor in
accordance with Section 26 05 19, LOW VOLTAGE ELECTRICAL POWER CONDUCTORS
AND CABLES. Size conductors in accordance with NEC Article 250. Provide grounding
conductors as required per the NEC.
Grounding & Bonding for Electrical Systems 26 05 26-2
DRP09328