Q. Internal diameter of pipe earthing electrode should not be less than …………. mm.
Solution:
For Pipe electrode internal diameter shall not be smaller than 38mm if made of galvanized iron or sheet and 100mm internal diameter if made of cast iron electrodes and shall be embedded below permanent moisture level.
For Rod electrode of the sheet or galvanized iron shall be at least 16mm in diameter and those of copper shall be at least 12.5mm in diameter.
Related Questions
Q. Type of microphone which converts acoustic signals to change in capacitance is
View SolutionQ. If the supply frequency to the transformer is increased the iron loss will:
View SolutionQ. Buchholz’s relay gives warning and protection against
View Solution
Get Question Bank
Strengthen Your Practice with our comprehensive question bank.
