ACCORDING TO INDIAN ELECTRICITY RULE 77 THE MINIMUM CLEARANCE ABOVE THE GROUND OF HE LOWEST CONDUCTOR FOR LOW VOLTAGE LINE ACROSS A STREET SHOULD BE :

 

A. 5.8

B. 6.1
C. 5.5 
D. 4.6

Answer: A 5.8 

Clearance above ground of the lowest conductor 

• No conductor of an overhead line, including service lines, erected across a street shall at any part thereof be at a height of less than:
• For low and medium voltage lines 5.8 meters
• For high voltage lines 6.1 meters
• No conductor of an overhead line, including service lines, erected along any street shall at any part thereof be at a height less than:
• For low and medium voltage lines 5.5 meters
• For high voltage lines 5.8 meters
• No conductor of in overhead line including service lines erected elsewhere than along or across any street shall be at a height less than:
• For low, medium and high voltages lines=4.6 meters.
• For a low, medium and high voltage=4.0 meters.
• For high voltage lines above 11,000 volts=5.2 meters.
•  For extra-high voltage lines, the clearance above ground shall not be less than 5.2 meters plus 0.3 meters for every 33,000 volts or part thereof by which the voltage of the line exceeds 33,000 volts.