Re: Adding a third keypad to a Caddx NX-8, wiring help requested!

[Karl Magnus <magnus@xxxxxxxxxxxxxx>]

Jim wrote:
> Karl Magnus wrote:
>
>
>>Perhaps not in this case, but on many systems by a certain mfg., using
>>solid wire for the keypad run invites nightmares.
>>
>>KM
>
>
> Care to tell us actually WHICH manufacturer, thinks there's a
> difference between stranded and solid wire?   And why?
>
> I could understand, maybe a difference between twisted and untwisted
> ...... or shield and unshieded .......but solid and stranded ?????
>
> If it's true, I'd really like to hear the manufacturers reason.
>

ITI Caretaker + and SX-V panels with alpha kp. The reason given from
engineering:

The electron "flow" in twisted wire has a better chance of "spinning
off" or keeping away, inducted interference, where sold wire (not
twisted) has no "spin" and picks up interference easier.

I have seen installs where a very long keypad run with solid wire would
work, but intermittently fail (false keystrokes) and replacing it with
stranded/twisted never failed to fix the problems.

Of course, they could be full of shit, but it worked. Every time.

KM