specifications - FAACO - Federal Aviation Administration Contract ...

B. GROUND CABLES:FTWIC-2235June 2009Stranded, bare copper of 98% percent conductivity.C. GROUND FITTINGS:Fittings for bonding ground cable to the conduit shall utilize a setscrew and shall be ULlisted for the purpose.2.02 GROUNDING SYSTEM:Provide a grounding system that includes all connections. Provide testing of ground rods, groundcables, ground buses, conduits, fittings, anchor supports, exothermic process materials andequipment and other materials as required for a complete installation.PART 3.00EXECUTION3.01 INSTALLATION:A. Ground electrical work in accordance with NEC Article 250, this specification and localcodes.B. Install ground cables in conduits above grade or directly buried in earth to a depth of notless than 30" inches below grade. Installation to provide sufficient mechanical protectionso as not to break ground cables or connections.C. 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, nonmetallicmaterials.D. Install a green-colored, equipment grounding conductor in raceways. Size conductors inaccordance with NEC Article 250.E. At each convenience outlet, install a grounding clip attached to the outlet box and leave asufficient length of #12 wire with green-colored insulation to connect to the groundingterminal at the receptacle. This clip may be deleted if an automatic grounding clipreceptacle meeting NEC Article 250-74, Exception No. 2, is used.F. At the service entrance equipment, bond the utility neutral, building neutral and buildingground conductor to a common ground bus (or ground lug), as shown on the drawings.Connect the ground bus to the building domestic cold water pipe and counterpoisegrounding system with a grounding conductor and an approved clamp and connector.Install the grounding conductor in exposed conduit and make connections readilyaccessible for inspection. The point of connection to the water service shall be as nearthe building entrance as possible. Bond the water pipe to the structural steel system ofthe building and to the counterpoise.G. Provide a communications system grounding conductor at point of service entrance andconnect it to the nearest grounding electrode.16450-2