meg:
I send you my condolances and hope that through finding answers to the cause of your son's electrocution, other lives may be saved.
I am neither an electrician nor an attorney. That said, my 2 cents:
Especially because you mentioned that your son "...left 2 little ones to carry on..." it might be important for you to
not discuss this in a public forum. I realize that no amount of compensation will ever bring back your son, but for the future of his children, you might want to check with your attorney.
A
Google search came up with an attorney in Texas as the first listing:
http://www.cliffroberts.com/electrocution.htm -- I know nothing about the firm; I'm passing along the information based on your User Profile showing that you are in Texas.
The lack of answers probably exacerbates your grief, and I wish to apologize in advance if I have added in any way to your pain.