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> EARTHING SYSTEM
EARTHING SYSTEM
1. DESIGN CONSIDERATIONS
Determine the type of earthing system required (e.g., TT, TN, IT).
Assess the soil resistivity and select appropriate materials.
Calculate the required earth resistance based on applicable standards.
Design the layout of the earthing system, including electrode placement.
2. MATERIALS SELECTION
Choose suitable earthing electrodes (e.g., rods, plates, strips).
Select appropriate conductors for earthing connections.
Ensure all materials comply with relevant standards and specifications.
3. INSTALLATION PROCEDURE
Excavate the area for earthing electrodes as per design.
Install earthing electrodes to the specified depth and spacing.
Connect conductors securely to the electrodes using approved methods.
Ensure all connections are corrosion-resistant and mechanically secure.
4. TESTING AND MEASUREMENT
Measure the earth resistance using an earth resistance tester.
Verify that the resistance values are within acceptable limits.
Perform continuity tests on all connections to ensure integrity.
Document all test results for compliance verification.
5. MAINTENANCE AND INSPECTION
Schedule regular inspections of the earthing system.
Check for signs of corrosion or damage to conductors and electrodes.
Test earth resistance periodically to ensure ongoing compliance.
Maintain records of inspections and maintenance activities.
6. DOCUMENTATION AND COMPLIANCE
Prepare and maintain documentation of the earthing system design.
Ensure compliance with local electrical codes and regulations.
Keep a log of all testing and maintenance activities for reference.
Review and update documentation as necessary for accuracy.
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