RE: Re: running cat5e outside

["Keith Doxey" <ukha@xxxxxxx>]

Lightning suppressors do exactly what they say.

Suppress the effects. For induced voltages they are very effective. At
sites
where the phone system used to die at the slightest flash of lightning they
minimised or even eliminated the problem.

However, NOTHING can protect against a direct hit. Currents in the order of
1000's of Amps flow for a few millisecnds releasing colossal amounts of
energy.

I have seen dropwire where it looked as if someone had slit the edge with a
razorblade and pulled the copper out leaving just the sheath. All traces of
copper had vaporised.

Any protection is better than non but you cant beat nature. Look at the
homes in the Hurricane regions of the USA. They have storm shutters that
protect a great many houses but if a tornado passes directly over the house
there is no house.

Keith

-----Original Message-----
From: Hawes,Timothy Edward (GEG) [mailto:haweste@xxxxxxx]
Sent: 29 January 2002 14:03
To: 'ukha_d@xxxxxxx'
Subject: [ukha_d] Re: running cat5e outside


Keith,

Are the lightning suppressors effective in preventing this kind of damage,
or do they just limit the effects ?

The surge-protected power strips which include telephone line protection
seem a good idea but if the lightning "jumps around" once it's
inside the
house are they really worth the money ?


Thanks,

Tim.

P.S. re: your last point, presumably your employer provided a clean pair of
trousers ?? ;-)