I was working in a Commercial building yesterday, hooking up some new mains.
In the bottom of the switchboard I saw this enclosure marked "Telecommunications Earth- Do Not Disconnect!"
And there was a 6mm2 wire leaving the box and running (I presume) out to an electrode outside.
I've never seen one of these boxes before, at least if I have, I've never taken any notice.
Why does the telcom's system need to be earthed?.
I thought it was a DC system, that was isolated from earth.
Could Paul or someone else please enlighten me?.
It just struck me as strange, it being the first time I've seen one!.
Let's face it, these days if you're not young, you're old - Red Green