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64 Chapter Four
FIGURE 4.23 Equipotentialization between ECPs and EXCPs.
In light of the above considerations, any metal part, with a resis-
tance to ground less than 1000 (or 200 ) and in contact with the
person’s body, lowers the conventional value of R BG , which we rely on
in the electrical design. Thus, 1000 (or 200 ) can be considered the
limit value of ground resistance of metal parts so to recognize them
as EXCPs for bonding purposes.
4.6.2.1 Should We Bond Each and Every EXCPs?
Figure 4.24 proposes a dilemma regarding the necessity to bond each
and every EXCPs.
FIGURE 4.24 Equipotentialization between ECP (light pole) and EXCP (fence).
