Some where some time a large amount of current has used the coax
ground wire to return to ground.
Now normally the bulk of the current should follow the mains
earth to ground.
Why has it not ?
Possibly at the time the mains earth was faulty, or non
existant, so the current took the only other path it could find.
CHECK AND DOUBLE CHECK YOUR MAINS EARTH !!!
If you have any doubts get the electric company to check the earth,
and the neutral strap.
Originally Posted by Phish568
On inspection of why my cable box and lcd tv hdmi input fried, I found the green ground wire on my cable connector outside was severed at both the connector and the inside wall ground post. How could this have happend? Both the connector and the ends of the wires were melted and black, effectively leaving me with no ground on the shared coax line throughout my home.