101) The clearance between the conductors of opposite polarity or phase and between the conductors shall be at least :

102) If the working voltage of an installation is 220 volts, then insulation tester rated voltage is :

103) As per IE rules, the voltage at the point of commencement of supply in the case of high or extra high voltage, shall not vary more than :

104) The type of conduit used for wiring is :

105) The metal conduits can be protected against corrosion by :