That switch indeed says "Allen Bradley", but that IS the classic Square-D
switch I referred to in an earlier email! Perhaps A.B. bought Square-D, or
the switches are private-labeled?
In any case, these are exactly the right thing for tower limit switches.
They can be wired for N.O. or N.C., can handle decent volts/current, and the
head (with the activator) can be rotated 90 degrees when you install it.
There's a whole bunch of activator arms and other assemblies which fit on
the end of the shaft.
Altho these switches are "weather proof" (???), when i install them I put a
bead of silicone caulk along the seals, and also use wire & fittings
suitable for oil, UV, and other environmental hazards, then put a dollop of
caulk on the wire fitting as well. One more tip, is to install the switch
inverted, ie the control wire should be at the bottom, minimally exposed to
If the tower owner can identify the basic type of switch, they can shop
(save money) for the same product from the industrial suppliers and get
exactly the same product. (I just checked the auction place, and there's
LOTS listed there.)
Good luck to all.
----- Original Message -----
From: "N7US" <firstname.lastname@example.org>
Sent: Friday, January 07, 2011 11:39 AM
Subject: Re: [TowerTalk] MCL-100 limit switches
>I bought a replacement RMC-1000 remote control package with limit switches
> for my HDX-589 last June. Both limit switches are Allen-Bradley Cat. No.
> 802T-AP Ser. J. The original switches were different on my 1994 tower.
> This seems to be the general type of switch:
> /tab2.html .
> I installed the package, including the big control relay box, new limit
> switches, both of which came prewired (though with a wiring error on one
> switch), and a replacement motor (which also had a wiring error) myself.
> lightning strike last April was the reason for the replacement.
> You might ask UST for a price on replacement switches, and I bet they
> give you the switch details.
> Jim N7US
> -----Original Message-----
> Since US Tower rarely divulges such information, can anyone who has the
> MCL-100 control box and limiting switches tell me who manufactures the
> switches and their part numbers? I seem to have a faulty upper limit
> that will need replacing.
> An electrician tried to realign it and get it working but could not do so.
> can move the tower down but not up, except when the electrician bypasses
> upper switch with a jumper in the control box.
> I have an HDX-555 and will keep it at 50-ft and not move it again until I
> can secure a replacement for the upper switch. I cannot read the info on
> switches because the labeling is too marred.
> Anyone out there with sharp eyes?
> Ed, W1MAG
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