Why would the pump motor need snubbing in this design more than in the
usual set up? Or, is snubbing one of those things that is always a
good idea but seldom done?

Good idea on the potting.

I've been constantly updating the jpg behind the original link which
is:

http://home.maine.rr.com/rlma/Switch.jpg

The socket I'm getting for the relay has a "coil suppression diode".
I assume that is intended to do the same sort of thing by preventing
current from flowing in reverse when the field collapses through the
coil.

--

Roger Long



"Ian Malcolm" wrote in
message ...
Roger Long wrote:

I really appreciate the advice on the snubbing because
incorporating it was going to required a whole enclosure for the
switch set up.

Minimum Snubbing, put a snubber across the pump motor. If you
solder stranded wires onto the resistor and the capacitor and twist
and solder the two components in series then put in a n old 35mm
film canister and pour in epoxy resin (glass microbubbles would be
fine as a filler), you will have a sealed unit you can connect to
the motor terminals.

Why not post a link to the new circuit diagram for some peer review
of the final design?


--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & 32K emails -- NUL:
'Stingo' Albacore #1554 - 15' Early 60's, Uffa Fox designed,
All varnished hot moulded wooden racing dinghy.