Why it is said that one should have separate earth pit for body earthing & neutral earthing of DG set & these pits shall not be connected to same earth grid?
Why only Neutral and body earth pits? As per National and international standards, all earth pits - I repeat - ALL earth pits in the plant premises MUST be linked/bonded, including Transformer Body, transformer Neutral, HV Body, Equipment Body, Lightning Protection earthing, Electronic earthing, static earthing - you name it, all must be connected together.
Vide Cl. 9.10.12.2 of IEEE 1100, "the use of any separate, isolated, insulated, dedicated, clean, quite, signal, computer, electronic or other such improper form of earth grounding electrodes for use as a point of connection of the EGC (Equipment Grounding Conductor) is not recommended".
And… vide Cl. 5.5.4.5 of IEEE 142, 'The NEC requires that all equipment served from an electrical source be grounded or bonded to the grounding point of that source. In addition, neutral of all power supplies are required to be grounded. Clearly, when an isolated grounding electrode is used for a computer, this violates NEC requirements. The NEC requires a metallic path from all equipment frames served, back to the source neutral".
vide IEC 60364-7-707: The use of independent, "isolated" earth electrodes for computer or
They can/must be linked underground,but should be seperate pits for body & neutral earthing.Connecting strip from body & neutral should go to respective earth pits.Isn't it right?
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DG Neutral and Body Earthing
Re: DG Neutral and Body Earthing
