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tony sayer tony sayer is offline
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Default Static electricity to the eyeball?

In article ,
Terry Casey scribeth thus
In article ,
says...

There is an earth rod in every cabinet - it's all run by
electrickery, after all, so you wouldn't want it floating!

However, at the point of entry into the house, there is an
isolator which passes the signal but prevents any nasties in
the house from damaging the equipment in the street.

Here's a typical example:

http://usr.audioasylum.com/images/1/...lland_CISP.jpg


That device says it includes surge protection, but does not show the
expected ground wire attachment point. My cable from the poles has a
smaller pass through device with a screw to tighten a ground wire into
it. I believe there is a filter at the power pole also.


I was specifically refering to a query about Virgin Media
cable in the UK which is all underground. Only BT and the
power companies are allowed overground distribution using
poles. The isolation is on the input and the cable is earthed
back at the street cabinet.



The output side will be earthed to
the mains by the Set Top Box or internet router.


How's that Terry seeing that most all of the net routers have a wall
wart supply and the only set top box here has a figure of 8 cable and no
earth?.

The one I linked to has provision for fixing screws - many
don't, as an internet search of your own will reveal. These
will simply clip into custom designed plastic housings with
security screws on the lid to prevent tampering.

The input cable will pass out of the back of the housing,
through a hole in the outside wall. All that will be visible
internally is the housing and the output socket


--
Tony Sayer