Date   : Mon, 06 Aug 2007 15:39:47 +0100
From   : pete@... (Pete Turnbull)
Subject: Suppressor (Econet)

On 06/08/2007 14:02, Johan Heuseveldt wrote:

>>> If and when I would extend my Econet network, I would like to fit
>>> Suppressors for safety reasons. If the cable is mounted along floors/walls,
>>> it is more prone to things like mains power or lighting.

>> If it is entirely in one or two rooms in a single house, then transient
>> suppressors are not really necessary.
> 
> It's just that /if/ something is going wrong, it can terribly going
> wrong. Horror can be found@...<http://www.heyrick.co.uk> (Richard Murray)

I don't know exactly what happened there, but I suspect suppressors of 
the sort that are used to try to prevent damage by lighning-induced 
spikes are not going to be much help.  They almost certainly won't 
prevent damage from shorts to low-voltage high-current devices like a 
faulty PSU and probably not from a short circuit to a mains supply. 
Experience here suggests they will prevent damage from spikes induced by 
a nearby lightning strike, but possibly not from a very close strike.  I 
lost a PC, a monitor, a modem, a cordless phone, a TV, a satellite box 
(which melted), and the mains filter unit in a PDP-11 when a neighbour 
had a direct hit, but the network was OK.

-- 

Pete                                           Peter Turnbull
                                               Network Manager
                                               University of York