Bruce EVangel Parmenter wrote:
Further research shows Jerry's idea of using a 120VAC 20A timer seems
sound.
Yes, it is. I've often used Intermatic brand timers for this purpose.
Model FF12HC (SPST, 120v 20a or 240v 10a) and FF412H (DPST, each contact
120v 20a or 240v 10a) are good choices. These are mechanical 12-hour
timers with no "hold" function (i.e. they can't stay on) for more than
the set time). I generally buy them at local electrical supply houses --
they are stocked for controlling fans, outdoor lights, etc. Price is
around $20.
http://www.intermatic.com/Products/Timers/InWallTimers/Springwound_Auto-Off_Timers/FFCommercialSeries.aspx
There are lots of cheap electronic timers as well. However, I've found
that most of them exaggerate their current ratings, and will burn up and
fail *ON* if used at high current!
--
A good scientist is a person with original ideas. A good engineer is
a person who makes a design that works with as few original ideas as
possible. There are no prima donnas in engineering. -- Freeman Dyson
--
Lee A. Hart, http://www.sunrise-ev.com/LeesEVs.htm
_______________________________________________
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.evdl.org/listinfo.cgi/ev-evdl.org
For EV drag racing discussion, please use NEDRA
(http://groups.yahoo.com/group/NEDRA)
