My real problem is i just dont know about electronics what i mean to say is I really have no clue which is why i have come to you kind chaps. Im doing a little research on this and have found some dummy info which is pretty cool, but im not quite understanding why it cant be done electronically. I have seen some engineers throw the earth leed in the bottom of a chamber thats got about three inches of water in the bottom while they are working on a telephone line. You may have seen these telecom boxes on the pavement, might be one outside your house.