Grounding arrangements

Main grounding The provision of a grounding arrangement is mandatory through the length of the panel. It may be of aluminium, galvanized iron (GI) or copper. (See also Section 22.4.)... 

Figure 13.35 View of a module of a fully drawn-out MCC showing grounding arrangement through a continuous running ground bus...

Figure 31.6 Grounding arrangement of a noncontinuous isolated phase bus (IPB) system...

Figure 3-61 The ground arrangements for the major converter topologies (a) the nonisolated dc/dc converter (b) the nonisolated, transformer-coupled converter (c) the isolated, transformer-coupled converter.

First letter (denoting the grounding arrangement at the source)... 

FIGURE 5.7 Typical 2 x 2-ft signal reference ground arrangement. 

The grounding arrangement required will be different for different installations, and will depend on where and how currents are generated. It is advisable to have an electrical expert determine the best setup. 

Figure 10.265 shows the recommended grounding arrangement for a typical broadcast or audio/video production facility. The building ground system is constructed using heavy-gauge copper wire (no. 4 or larger) if the studio is not located in an RF field, or a wide copper strap (3-in. minimum) if the facility is located near an RF energy source. Figure 10.266 gives a functional view of the plan shown in Fig. 10.265. Note the bulkhead approach.

FIGURE 10.265 Typical grounding arrangement for individual equipment rooms at a communications facility. The ground strap from the main ground point establishes a local ground point in each room, to which aU electronic equipment is bonded. 

Figure 16.34 shows the recommended grounding arrangement for a typical broadcast facility. The configuration is referred to as a star ground system because of the way the various pieces of equipment are connected in a radial pattern around the central ground point. For larger systems, a star of stars system is used, as illustrated in Fig. 16.35. 

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