On Mon, 16 May 2005 10:30:55 GMT, "Roger Long"
wrote:

Like this, right?

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

I can appreciate the effect. I made a box in high school with a coil
in it and a switch made from a nail dangling in a ring. It had
textured aluminum foil sides wired to the coil and said "Mystery Box"
on top. It was a hoot when I left it in the faculty room.

Do you think I can get away with a single contact relay? The sealed
fog light relays that are readily available seem like they should be
sized and just right for this application.


I am sure you can get away with the one pole switch relay - but the
float switch then takes the motor current make and break and I suspect
the usual float switch won't feature 20 Amp contacts - but an auto
relay will. So there's a life trade-off.
If you can source a two pole relay, let the float switches handle the
modest relay current, and the second relay switch then handles any
reasonable - even unreasonable - bilge pump load.

Brian Whatcott Altus OK