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From: pozar@hoptoad.uucp (Tim Pozar)
Newsgroups: comp.periphs,comp.terminals,comp.dcom.lans
Subject: Re: Telco-style push down blocks and stranded cable
Message-ID: <1634@hoptoad.uucp>
Date: Fri, 9-Jan-87 11:57:41 EST
Article-I.D.: hoptoad.1634
Posted: Fri Jan  9 11:57:41 1987
Date-Received: Sat, 10-Jan-87 00:10:54 EST
References: <2551@phri.UUCP> <2856@osu-eddie.UUCP>
Reply-To: pozar@hoptoad.UUCP (Tim Pozar)
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In article <2856@osu-eddie.UUCP> paul@osu-eddie.UUCP (Paul Placeway) writes:
>
>At Ohio State, we have been using punchdown blocks for quite a while.  They
>seem to work just fine, but we use only single conductor (3 conductor
>telephone wire) to wire and cross connect.  You might try striping about
>1/4 inch and tinning it, then punching in the tinned part. (or, how to make
>stranded into single conductor wire).
>

    I missed the previous postings.  I assume your discussing the merits
of punch/crunch/66 blocks.  We're using the blocks for high density, quick
changing connections for audio at our station.  I'm using Belden 8451 wire
with the blocks.  8451 is a 22ga., foil shield with drain wire, single
pair, stranded cable.  We punch it down with the insulation intact with a
standard punch tool.  Stripping the wire first, because of the density of
the connections, is not a good idea.  The exposed wire is too vunerable to
shorts with frayed wires and the wire laying across other connections.
Before we decided to use stranded wire we tested punch connections with
8451, 8450 (solid), and several other brands of simular wire, one being
Naglix.  I also have been using 8451 with these blocks for the past 6
years.  During this years I haven't had one connection that I have had to
repunch due to oxidation  or bad punches.
   . Before we punch down the connections, we paint the blocks with a
non-oxidizer from Caig Labritories.  Just for my peace of mine...
     I would like to add that we also research differant type of
connection blocks.  We also have results originated by the military
comparing different type of connections vs. life expectancy.  If anyone is
interested in this data, you can send me mail and we can make arrangements
for sending it to you.