I have always been told all grounds have to go to the building common point
ground. So if that was farther than 20 feet then there is a conflict.
Secondary ground rods are a no no here.
From: James Howard
Sent: Thursday, September 2, 2021 9:01 AM
To: 'AnimalFarm Microwave Users Group'
Subject: Re: [AFMUG] resistivity of cat5
We’ve been told the code applies to tv antenna wire as well. Anything that
“pierces the envelope” by coming from the outside to the inside.
From: AF <af-boun...@af.afmug.com> On Behalf Of Chuck McCown via AF
Sent: Thursday, September 2, 2021 9:52 AM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Cc: Chuck McCown <ch...@go-mtc.com>
Subject: Re: [AFMUG] resistivity of cat5
Does that include low voltage?
Sent from my iPhone
On Sep 1, 2021, at 7:18 PM, James Howard <ja...@litewire.net> wrote:
Is it a Wisconsin thing that you have a to have any wire that penetrates the
building “envelope” grounded within 20 feet of penetration to meet code?
Seems like if you have to ground it anyway within 20 feet of entry, put the POE
there and then they can have their extender wherever they want along the rest
of the run.
From: AF <af-boun...@af.afmug.com> On Behalf Of Steve Jones
Sent: Wednesday, September 1, 2021 4:45 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Subject: Re: [AFMUG] resistivity of cat5
all but the exterior cable run of maybe 12 feet. theyre extending their
building out and putting up another building in the current LOS
On Wed, Sep 1, 2021 at 3:43 PM James Howard <ja...@litewire.net> wrote:
Just out of curiosity, if he can put a network rack at the midpoint, how
much of this is inside buildings?
From: AF <af-boun...@af.afmug.com> On Behalf Of Steve Jones
Sent: Wednesday, September 1, 2021 12:26 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Subject: Re: [AFMUG] resistivity of cat5
thats what i suggested trying first, customer wanted the extender,
irritating
he finally has caved now and will be putting a network rack in the midpoint
and is going to place a managed switch there instead of all this other
unsupportable cobbling. Sometimes we get a win.
On Wed, Sep 1, 2021 at 11:55 AM Adam Moffett <dmmoff...@gmail.com> wrote:
Maybe a dumb question, but has it already been tried without the
extender?
400ft is beyond 100m, but not by all that much. It might just work
without any faffing around.
On 9/1/2021 11:16 AM, Steve Jones wrote:
I have a customer fixed on using
https://i.mt.lv/cdn/product_files/GPeRqg_190928.pdf to extend his epmp f300
radio run to 400+ feet.
if im calculating this right there will be about a 10v drop on the
24guage cat5, taking the 30v down to 20. If it does manage to keep the radio
powered i see it burning out the poe circuit.
hes fighting me on putting the cambium PSU at the midspan point and
using his own POE to power the extender.
Ive been overruled about telling the customer no, so its happening, but
I want to make sure my math is correct
using https://www.rapidtables.com/calc/wire/voltage-drop-calculator.html
24guage, 30v, .5 amp, 400 feet shows 10v drop. but im not sure about
the resistivity field
this is a guy who runs constant latency monitoring and initiates
tickets on every blip, so i see this radio move just becoming a nightmare with
this midspan extender in play
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