Common use of Grounding Clause in Contracts

Grounding. The substation yard is L-shaped with the outer leg dimensions of the ground grid of 338 feet by 507 feet which includes the area 5 feet outside the perimeter fence. Substation grounding grid resistance shall be designed to be less than 5 ohms per IEEE- 80, measured without external ground and without the grounding grid of the Large Generating Facility connected. In addition, the 230 kV Control Building shall be furnished with a special high frequency grounding system for the protection of electronic equipment from transient electrical noises as recommended by IEEE 1100. The below grade grounding system installed in Phase I includes the ground grid and ground wire tails for the Phase II work. The grounding work associated with Phase II is the above grade connections to Phase II equipment.