+ Post New Thread
Results 1 to 7 of 7
Wired Networks Thread, Home network lightning protection in Technical; ...
  1. #1
    ADMaster's Avatar
    Join Date
    May 2012
    Posts
    330
    Thank Post
    5
    Thanked 35 Times in 30 Posts
    Rep Power
    23

    Unhappy Home network lightning protection

    Hello all,
    My home network and Home PC have had a bad few weeks. About 2 weeks ago lightning struck across the street and I lost the onboard NIC in the PC. I also lost the switch port that the PC and the DVR were connected to.
    I just installed the new RMAíed MB last Thursday and sent the bad one back yesterday. Last night there was another storm and lightning struck a tree in the back yard. I get home from work today to find the onboard nic is out again, the DVR is dead, and the port my PC was connected to is dead. The DRV port is probably dead to, but I havenít got that far.
    I donít really want to RMA the board again, so I found an old NIC in the office to get me back online.

    My equipment is connected with a patch panel in the basement with jacks going to most of the rooms. They are on surge protectors, but itís getting into the network somehow.


    My question is what can I do to protect my equipment from this?

    Any ideas and suggestions are appreciated.

    Thank you,

  2. #2
    ass17's Avatar
    Join Date
    Feb 2013
    Posts
    326
    Thank Post
    5
    Thanked 35 Times in 34 Posts
    Rep Power
    26
    Do some research into surge suppressors. Or get a good UPS from APC.

    There must be ways that towns which suffer from constant strikes manage to keep all the IT equipment online.

  3. #3

    Join Date
    Oct 2008
    Location
    Lincolnshire
    Posts
    2,197
    Thank Post
    13
    Thanked 228 Times in 217 Posts
    Rep Power
    67
    How does your internet come to your property, cable or via telephone line, that will be how it gets your network, suspect telephone line. Had a run of it around here, telephone lines got hit, phones and routers were killed.

  4. #4


    Join Date
    Jan 2006
    Posts
    8,202
    Thank Post
    442
    Thanked 1,032 Times in 812 Posts
    Rep Power
    339
    Quote Originally Posted by ADMaster View Post

    My question is what can I do to protect my equipment from this?

    Any ideas and suggestions are appreciated.
    Find an insurance company that covers you.

  5. #5
    ADMaster's Avatar
    Join Date
    May 2012
    Posts
    330
    Thank Post
    5
    Thanked 35 Times in 30 Posts
    Rep Power
    23
    Ass17, I have a surge suppressor on my PC, I’ll be looking at others though.

    MathewL, The net comes in through the phone line, but if that is how it got into my network why is the modem and firewall machine not fried. They are first in line.

    Cybernerd, I have insurance, but the deductible is either $500 or $1,000 I’ll have to look to be sure. The board was RMA’ed so no cost there. I could get a new PC for less than the deductible, and a new router.
    So insurance would only help if it took out all the electronics.

    The DVR is on the network so is it possible that the dish picked up the lightning sent it to the DVR and the DVR put it on the network? That doesn’t entirely make sense either because the other receiver, not on the network still works.

    Thanks,

  6. #6

    Join Date
    Oct 2008
    Location
    Lincolnshire
    Posts
    2,197
    Thank Post
    13
    Thanked 228 Times in 217 Posts
    Rep Power
    67
    In response to your question, pass.

    Just talking from experience, lost 2 routers and numerous phones due to the phone line getting hit.

  7. #7

    Join Date
    Mar 2010
    Posts
    3
    Thank Post
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Quote Originally Posted by ADMaster View Post
    The DVR is on the network so is it possible that the dish picked up the lightning sent it to the DVR and the DVR put it on the network? That doesn’t entirely make sense either because the other receiver, not on the network still works.
    First understand how surges do damage. For example, a lightning strike far down the street is a direct strike incoming to every household appliance. Why are all not damaged? Because surges are electricity. A surge incoming on one wire without an outgoing path to earth via some other wire typically does no damage. It is electricity. Both incoming and outgoing paths must exist.

    A classic example is a surge incoming to a PC on AC mains. Often through a motherboard to the NIC. Outgoing from the NIC into a router and modem. Then outgoing to earth via a cable or telephone line.

    First that current is everywhere (simultaneously) in that path. Much later only one or but a few items fail. In your case, the NIC (the outgoing path) would be one failure. Failures are often on the outgoing path; not always on the incoming path.

    Phone lines and cable already have a best protection / connection to earth. As even required by code. Surges typically are outgoing to earth via these utility wires - not incoming. AC electric has no earthing on most wires. Therefore AC electric is a most common source of incoming surges.

    Damage was because some wires are entering the building without first connecting to single point earth ground. Either connected using best protection - a hardwire from cable to earth. Other utility cables that cannot be earthed directly must be connected by another solution - a 'whole house' protector. Protection is always about connecting a surge to earth BEFORE it can enter the building. That connection via a wire or a protector. Once permitted inside, that surge will hunt for and find destructive paths to earth via appliances.
    Last edited by westom; 28th June 2013 at 01:29 AM.

SHARE:
+ Post New Thread

Similar Threads

  1. Password protecting home networks
    By elsiegee40 in forum General Chat
    Replies: 1
    Last Post: 12th December 2008, 10:47 AM
  2. Replies: 0
    Last Post: 5th April 2008, 10:46 AM
  3. Recommend me a cable router please for home network
    By Kyle in forum Wireless Networks
    Replies: 12
    Last Post: 11th June 2007, 06:29 AM
  4. Replies: 1
    Last Post: 1st February 2006, 01:04 AM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •