case, not less than 3 meters below ground level. Wherever possible,earth electrodes shall be located as near the water tap, water drain or near down take pipe.
The earth plate shall be set vertically and surrounded with 150 mm thick layer of charcoal dust and salt mixture. The G.I. cap over the GI pipe shall be housed in a brickwork chamber, approximately 300 mm x 300 mm x 300 mm deep. The brickwork chamber shall be provided with a cast iron inspection cover resting over a GI frame, embedded in brickwork.
No earth electrode should have a resistance more than 3 ohm measured by an earth resistance meter. In rocky soil the resistance may be up to 8 ohm.
Plate earthing is an effective method for providing a low resistance path to ground, but it does have some drawbacks. The installation cost is higher compared to other earthing methods like GI pipe. If the plate gets damaged over time due to corrosion, the entire earthing system may need to be reinstalled, incurring additional costs. GI pipe earthing is a more economical alternative that can achieve similar low resistance values. Pipe earthing is also easier to install. However, for applications requiring very high fault current handling, a large copper plate may still be preferred over a GI pipe. The choice depends on the specific requirements and budget.
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ReplyDeleteGreat insights on this topic! gi plate earthing is essential for ensuring electrical safety and effective grounding in various installations. This blog does a great job explaining the concept. Looking forward to more such informative posts!
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