>    Important rule  for safety & Earthing practice is based on IE RULE 1956 . RULE 35 > Warning plate                       if voltage is above 400 v there should use warning plate . RULE 44 > Penality of interferance with meter                     first aid equipment in every building  RULE 49 > Leakage current   in a cable should not above 1/5000 of full load current  RULE 33 > Supplyer should be provided with earthing for consumers . RULE 54 > % change in voltage at consumer end  (LOW)  max  voltage varition = +_ 6%           for hoigh voltage = +_ 6 to 9 %            for extra high voltage = +_ 10 to 12.5 %  According to IE RULE voltage level  low voltage = 0- 250V...