Grounding Standards

[DJS]

I've been looking around for a set of standards for grounding
telecommunications equipment in a telecom hut. Any ideas where I can find
these ?

 

[Paul Hovnanian]

DJS wrote:

I've been looking around for a set of standards for grounding
telecommunications equipment in a telecom hut. Any ideas where I can find
these ?

Start with the NEC if you are in the USA. That references some other
standards specific to various other industries. Other countries will
have different standards from the NEC.

--
Paul Hovnanian mailtoaul@Hovnanian.com
------------------------------------------------------------------
Bureaucrat, n.: A person who cuts red tape sideways. -- J. McCabe

 

[Ken Taylor]

"DJS" <djs11@yahoo.com> wrote in message
news:11abslmofo1fs22@corp.supernews.com...

I've been looking around for a set of standards for grounding
telecommunications equipment in a telecom hut. Any ideas where I can find
these ?

Is this what you need?

http://www.mohawk-cdt.com/techold/standards607.html

A search on 'telecommunications grounding standards' elicits a suitable
number of responses; check which one suits you.

Cheers.

Ken

 

[Howard Eisenhauer]

On Tue, 7 Jun 2005 14:17:29 -0500, "DJS" <djs11@yahoo.com> wrote:

I've been looking around for a set of standards for grounding
telecommunications equipment in a telecom hut. Any ideas where I can find
these ?

Are we talking cellular/wireless here or something else? Things will
vary a bit if you're sticking a great big lightning target up in the
air .

The place to look is the Telcordia/Bellcore site, they publish the
standards used in telcom installations.

If it's still available they have an excellant "background" book
called "The Why's of Grounding", gives a real good overview of
grounding requirements & *why* they're requirements. Some stuff is
specific to radio sites.

Did you know the source impedance of a lightning bolt is 5000 ohms?
You will after you read that book & what that means to you if you're
in the building during a strike .

Here's a link-

http://telecom-info.telcordia.com/site-cgi/ido/newcust.pl?page=idosearch&docnum=LP-Y88&


Grounding specific documents (may or may not be what you're looking
for but fiendishly expensive in either case)-

http://www.telcordia.com/webapps/search/Search?qt=grounding&submit=Search&col=extranet&col=store&nh=15&pw=100%25&lk=2


For "nuts & bolts" of putting the equipment togeather properly you'll
need thier GR-1275 installation standards book ($$$), which
unfortunately doesn't appear to be available as a book anymore .
It also has very good background info on grounding systems although
more from a central office environment viewpoint but a lot of it
translates into huts as the equipment is usually designed to CO
standards.

http://telecom-info.telcordia.com/site-cgi/ido/newcust.pl?page=idosearch&docnum=GR-1275&


The above will get you started on understanding whats going on &
what's required but there are as many different viewpoints on exactly
how to implement a grounding system as there are people doing it.
Some implementations work well, some don't. You are dealing with at
least three different systems- equipment ground, commercial power &
(maybe) lightning protection. How each is implemented, how the are
interconnected, how they interact with each other and how much it will
run the budget over has, in my personnal experience, been a discussion
(usually with raised voices) about obscure points involving near
religious belief in hearsay & outright misinformation.

Have fun .


Remember-

Switching is a Science
Radio is an Art
Grounding is F***ing Black Magic


H.