Q. Internal diameter of pipe earthing electrode should not be less than _mm
Solution:
- Pipe electrodes shall not be smaller than 38 mm internal diameter if made of galvanized iron or steel, and 100 mm internal diameter if made of cast iron.
- The depth at which the pipe must be buried depends on the moisture of the ground.
- The minimum depth at which the pipe must be buried in pipe earthing is 3.75 meters.
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