EMERSON VE4033S2B1 Contact input module

Since a large solid conducting surface may not be economically feasible for some installations, a ground reference plane, made up of a copper grid, should be considered. Copper-clad steel wire meshes with all crossovers brazed are commercially available. They are obtainable in mesh spacings of from 5 to 61cm (2 to 24 in) squares, 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). Electrically continuous stringers of raised floors may also be used to serve as an equipotential plane. Ground connections can be made to either the grid or stringer by direct bonding or manufactured ground “buses” and give grounding access at the floor surface. Normally, if the grid is embedded in a concrete floor, the latter method provides the easiest grounding source. Equipotential planes for existing facilities may be installed at or near the ceiling above the CE equipment.

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