12) If a distribution line and street lighting fixtures are installed on the same pole then their span should not exceed :

13) As per I.E. rules, no service line should be tapped :

14) As per I.E. rules, no conductor of overhead line including service lines be erected across a street shall at any part thereof be at a height less than _____ metres for low and medium voltage lines.

15) As per IE regulation, when service lines are insulated elsewhere other than along or across any street with insulated conductor, the conductor of the line at any part small have a height not less than a specified value. What is this specified height up to

16) In industries, number of machines are installed in rows. In such places overhead bus system is used for distribution of electrical supply to each machine. The recommended maximum current density for aluminium bus bar is