My son was electrocuted when he came in contact with a Speedrooter that a plumber was using to unstop a drain line. Sparks were generated when the "snake" came in contact with the cast iron sleeve on the floor-he touched the bear metal handle bar to shut-off & move the machine-became grounded, he died fron low voltage electrocution. Machine was equiped with a Leviton GFI. My son (25) was not wearing shoes and the floor was damp. I am trying to find out just how this could have happened. Why did the gfi fail, receptical was not grounded (house 30 yrs old). Just looking for answers from the professionals-hope this posting does not offend anyone-any input is appreciated.