Earthing guide for surge protection

As we have seen earlier, lightning discharges to ground set up large transient voltages, with respect to local ground, on incoming cables. So far, in dealing with surge protection, we have assumed a

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The external equipment-grounding-conductors (i.e. the main grounding conductor from customer''s power distribution panel as well as the other conductors of the grounding system outside of cabinets

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DISTRIBUTION BOX

Each DISTRIBUTION BOX and controller must be grounded. On the US market, a 5.26 mm 2 (10 AWG) ground wire must be used, and in all other markets a 6 mm 2 must be used.

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Distribution System Grounding

Summary Good system grounding provides the path for normal load and fault currents while maintaining load and controls temporary overvoltages. Good equipment grounding ensures

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When good grounds turn bad?isolate!

To make designers aware of these design pitfalls, this article explains where GPDs originate in the electrical installation, how ground loops are created unintentionally, and how isolation circumvents

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