On 22/10/10 18:03, Mark Harrison wrote: > Date: Fri, 22 Oct 2010 10:47:42 +0100 > >> From: Alan Pope<a...@popey.com> >> Subject: Re: [ubuntu-uk] Powerline Recommendations >> To: bdr...@crosswire.org, UK Ubuntu Talk<ubuntu-uk@lists.ubuntu.com> >> Message-ID: >> <aanlkti=eeef3pwvvg3r2bdtmafvjzaq8nun6b5gp7...@mail.gmail.com> >> Content-Type: text/plain; charset=ISO-8859-1 >> >> On 22 October 2010 10:44, Barry Drake<bdr...@crosswire.org> wrote: >> > I drilled throught the outside wall and have CAT5 all around the >> > outside. ?Quick, easy, fast, secure .... >> > >> >> ...almost certainly against building regs.. :) >> >> If it gets struck by lightning (a very real possibility given it's >> grounded via your PC/switch at each end, it could blow your entire >> network up. >> >> Armouring the cable may help though. >> >> Al. >> > > I've been active in the Home Automation market, both as a hobby and then > professionally, since 1997, and have never encountered a lightning strike on > external cable.
Our house has 3 large scots pines within 5 or 6 meters. The roof mounted TV aerial is almost surrounded or within arms length of some branches. One day, I chanced to actually see a lightning strike on these trees one afternoon. The TV was on at the time, in my view, although I was also looking out at the storm. We much later discoverd a large branch at the top of one tree was broken, I guess, by the strike. Anyway, The TV went off at the strike. When the storm ceased, I investigated. The mains powered TV signal booser amplifier, near the TV, had failed, no external fault was apparent, nor burning, presumably saving theTV tuner. The amplifier happened to still be in warranty, and was replaced...... :-) In passing, I later came across an article which said tests had shown that lightning had been found to go through brickwork, presumably under certain conditions. If you enjoy horror stories try http://www.lightningsafetyalliance.com/press.html -- alan cocks Ubuntu user -- ubuntu-uk@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk https://wiki.ubuntu.com/UKTeam/
