Rob Morley <(E-Mail Removed)> wrote in
news:(E-Mail Removed) .com:
> BRG <(E-Mail Removed)> wrote:
>> Rob Morley <(E-Mail Removed)> wrote in
>> news:(E-Mail Removed) .com:
>>
>> > BRG <(E-Mail Removed)> wrote:
>> >> Cyberdog <(E-Mail Removed)> wrote in
>> >> news:(E-Mail Removed):
>> >>
>> >> > It should be at least 12 inches away from any mains cable.
>> >> >
>> >>
>> >> Why?
>> >>
>> >>
>> > Because otherwise it won't work so well.
>> >
>>
>> OK. But why?
>>
>>
> The perceived wisdom is that voltage spikes caused by switching
> a power connection can interfere with the ethernet signal, but I
> just found something that suggests that this effect is
> negligible:
>
> http://www.wiremold.com/www/commerci...ers/index.asp?
> wpid=11
>
Interesting. I've always struggled to understand how 50Hz+spikes
would have a significant interference effect on twisted pair (=
high common-mode interference rejection) cable carrying Ethernet (=
10MHz or higher).
I can accept that data and power cabling should be separated from
an electrical safety perspective - to reduce the probability of the
meltdown of a power cable feeding mains up your LAN or phone or
whatever.
--
BRG
===
http://www.brgservices.co.uk/