Re: Wireless Relay Question (?)

[David <invalid@xxxxxxxxxxxx>]

On Sat, 18 Jul 2009 20:49:06 -0700 (PDT), Jim <alarminex@xxxxxxx> wrote:

>On Jul 17, 9:10?pm, David <inva...@xxxxxxxxxxxx> wrote:
>> This question is a bit off-topic, sorry; but it is related, and I very much
>> respect this NG's knowledge of things related...
>>
>> I am going to have need for a "remote" switching capability for a water
>> pump motor, and also a gate opening/closing motor. ( In this case "remote"
>> means at least 50 meters.) ?I would like to use wireless if possible, to
>> avoid having to trench and bury cables, (whose locations will surely be
>> forgotten, and then re-located by some gardener's shovel.)
>>
>> Having no experience with wireless relays/switches, I do not know whether
>> this idea is even practical, even more so at these distances.
>>
>> Can someone give me some thoughts/recommendations on how I should attempt
>> to solve this problem? ?If there are specific hardware components that
>> could be used, I would appreciate weblinks so that I can learn from them.
>> (BTW, I live in a 220-240 VAC location.)
>>
>> Finally, if there is a more appropriate place for me to post this question,
>> please tell me and I will be happy to do so.
>>
>> Thank you very much,
>
>> David
>
>Hi David,
>
>I would suggest that you look at the following website:   www.linearcorp.com.
>Linear is a major supplier of wireless relays. They also have remote
>gate operators. So I think you should be able to find what you need
>there. Also, they have just general duty wireless transmitters and
>receivers that will work up to a few miles away. Do be careful however
>of any restrictions you may have in your country about the use of
>radio frequency devices.
>
>By the way, how did you make out with your alarm system and your
>special grounding requirements?  Are you still having problems with
>the water buffaloes or were you able to contain them?   :-)
>
>Here in the US our "varmints" are usually more docile and get no
>bigger than a deer.

Hi Jim,  you have a good memory!  That was certainly a lengthy exchange re
lightning grounding and panel grounding here in ASA.  I learned a lot from
it!  In fact, I saved that whole 100+ posts thread and have reread it
several times!  Based upon that thread I have installed a single point
ground consisting of Ufer concrete-encased rebar tied onto a buried copper
loop around the entire construction. That underground loop is also bonded
at opposite corners to the lightning air terminal down conductors. I hope
that I've done it right, but there was so much controversy and opposing
perspectives, (even within the literature), that I just tried to drive down
the middle.  Oh, and I finally got the neighbor's water buffaloes out of my
banana plants.  But I guess I'm getting a bit off topic...

On topic: I have already accessed your linearcorp site, but it will take
some time to study everything.  (And I will, and will probably have some
questions.)  But I just wanted to acknowledge your reply.

Thanks again, Jim