FOXBORO P0917XV Input module

Finally, the conductors of the network are to be routed in a manner that avoids long runs parallel to primary power conductors, lightning down conductors, or any other conductor likely to be carrying high amplitude currents. (f) Lower frequency signal reference subsystems are not recommended as the sole system in communications-electronics facilities. d. Typical components and installation details. Typical components and installation details for signal reference subsystems are described below.

a ground reference plane, made up of a copper grid

Conducting media that can be utilized for the equipotential plane generally consists of a copper grid embedded in the concrete floor or raised metal floor such as computer floor. Since a large solid conducting surface is not economically feasible for some installations,  or copperclad construction mesh with 4-inch openings may be embedded in the concrete with ground risers installed to the surface of the concrete. The mesh is commercially available in AWG wire sizes Nos. 6, 8, 10, and 12. It is normally furnished in 3.7m (12 foot) rolls, but can be obtained in various widths up to 5.5m (18 feet).

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