Severe surge - how can I tell if I am properly grounded?

Status
Not open for further replies.

ckelly33

New member
Location
United States
I am not an electrical professional - but I really need advice from someone.

I moved into a new house about two years ago. It has a separate garage and 'man cave' that I put a projector in and watch sports on. The separate garage also has a separate electric meter (if that helps any)

Within a month, I had an electrical surge that damaged equipment. I didn't think that much of it and simply replaced what was damaged along with new surge protection. It happened two more times and I put a surge arrestor on the electric meter. It happened again this weekend and traveled into the house as well - this time causing thousands of dollars in damage. It seems (from the path of damage) that it is possible that it came into the house via my wired internet - though I do not know for sure.

I am trying to figure out where my problem is. I have a couple of questions on the possibility of the cable TV/coax being the culprit. First - is this even likely? Second, I can see where the cable comes into the house and it appears to be grounded to the electric ground - should it have its own ground? I can also see where it comes into the separate garage but it does not appear to be grounded. I assume this may be because it is a continuation of the line that comes into the house - but I do not know this for sure. Either way - should it be grounded prior to entering the separate dwelling?

I really appreciate any advice. Here are a couple of reasons why I am concentrating on the cable. First I bought this house from a friend who moved and he never had such issues. The only change I have made is to switch his wiring from satellite to cable TV and install a wired ethernet network within and between both buildings. Since I have had this 4 times in 2 years, I am looking at why his experience and mine are so different - and cable TV seems to be the only change (BUT I don't want to concentrate on the wrong area). Finally the path of destruction seems to (mostly) follow the network THEN travel up HDMI as all damage was to either network connected devices OR devices connected by HDMI to network connected devices.

I appreciate all advice.

Thanks
 
The only thing we can suggest is to hire a competent electrician to check out your electrical system.

You or your neighbors could have a issues causing voltage on the cable connection. Or it could be something else but there is no way to troubleshoot it from here.

With that said ...

I am closing this thread, in accordance with the Forum Rules.

This site is designed for:


  • Contractors
  • Electricians
  • Engineers
  • Inspectors
  • Instructors
  • Other electrically related individuals

* This NEC? Forum is for those in the electrical and related industries. Questions of a "How-To" nature by persons not involved in the electrical industry will be removed without notice.
 
Status
Not open for further replies.
Top