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Re: A puzzle to solve



On 2/9/2020 6:49 PM, ABLE1 wrote:
> On 2/9/2020 6:59 PM, Jim Davis wrote:
>> Hey guys, the other day I had a problem tracing a wire and I used a
>> method Iâ??ve used for years. It just occurred to me that I donâ??t know
>> if itâ??s something that everybody knows or not.
>>
>> This was the problem. I ran about a hundred fifty cat 6 wires for both
>> network and telephone in a 5000 square foot office. The office was
>> originally meant to be two individual office spaces and separated by a
>> thick fire wall. A bunch of the network wires ran through the fire
>> wall to the other side. There are ceiling tiles at about 16 feet. One
>> of those wires was for the purpose of carrying a signal to an 82 inch
>> TV on the other side of the firewall that was mounted about 10 feet
>> off the floor. The wire was supposed to be running from a cable box in
>> a utility closet on the other side of the fire wall via an HDMI
>> extender.. In back of the wall with the TV are two small rooms. One a
>> bathroom and one a storage closet both with only 8 foot ceiling tiles.
>> In order to get to the back of the TV the ceiling grid needs to be
>> disassembled and an extension ladder maneuvered into the small room
>> and put up to see over the wall to the back of the TV. Something I had
>> planned to only have to do once when connecting the TV to the HDMI
>> extender.
>>
>> Well the owner decides that he doesnâ??t want the cable box in the
>> utility closet. He wants it moved to another closet in another office.
>> Now, ---- I have the TV wire in the utility closet labeled out of the
>> hundred or so network wires but all the wires are bundled, and tied
>> into a cable and mounted to the network rack and shelves.  That is,
>> ---- the wires arenâ??t just loose and hanging going up through the
>> ceiling from the closet below. Above the ceiling above the closet I
>> can see that there are 20 or so wires coming through the fire wall
>> from the direction of the TV. So above the ceiling, I canâ??t tell which
>> wire in that bundle is the one from the TV .
>>
>> OK, so I take out my wire signal tracer and attach it to the wire end
>> in the utility closet and discover that Iâ??m not getting signal. I can
>> only surmise that when I pulled the wires over to the TV I stripped
>> them all, twisted them together so I could reduced the size of the
>> wires I had to put through the hook in my snake. So now the bare wires
>> are shorted behind the TV and I canâ??t get a signal from my wire tracer
>> up in the ceiling above the utility closet so that I know which wire
>> to pull back up from the closet to re-route to the other closet.
>>
>> And remember, I can't see where the wires are in the closet from above
>> and Iâ??m working alone on an extension ladder and I donâ??t have anyone
>> to try and tug on the wire from below.
>>
>> I found the wire in less than 5 minutes.
>>
>> How would you do it?
>>
>
> Well JIM!!!
>
> You pose a interesting puzzle.
>
> My first thought was to burn down the building and start over.
> But, NO that would not be a good thing...................
>
> So if you were using good quality wire and you looked at the footage
> label on the wire and knew the length of the run, then doing a little
> algebraic calculation should give you the wire to find.
>
> I could be wrong, but this is just a test, right??
>
> Let me know how I scored!!
>
> Thanks,
>
> Les
>
not sure I follow the story completely
but I've found different lengths of bundled
wires in the past using their "ohm" readings.
high resistance = longer run
lower resistance = shorter run..
a good digital meter can be very handy..
;-)
--

*Rocky T. Squirrel, esq.*



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