Spud wrote:

"Jeff Wisnia" wrote in message
...


If there's a neutral in the shed, (And I sure hope there is.) then you
could run one side of the 240 (i.e. 120 vac to neutral) out and back to
the pressure switch and then all you'd need is a double pose-single
throw relay with a 120 vac coil to switch both sides of the 240 volt
power going out to the pump.


Why whats the neutral for and where on the pump do you connect this
120 not needed or used so run the wire then wire nut it at the pump??


One end of the 120 volt relay coil (located in the shed) would connect
to neutral. The other end of that coil would receive 120 volts (from one
side of the 240 volt supply) controlled by the pressure switch. If
there's no neutral in the shed, then you couldn't use that scheme.


Since your talking 12-3 wire that says to me that the motor running
current is less than 20 amps, so the relay wouldn't have be a monster,
just get one rated for "motor starting", for the size of your pump motor.

Those relays aren't very costly, and since you're concerned enough to be
asking about it, you may not sleep well unless you change it over, I'd
go for it.

Searching eBay for "motor starter" (using an exact term search.) brings
up lots which would work, like this one:

http://tinyurl.com/7azjf

You'd just use two of the three poles of course.


Or this
http://cgi.ebay.com/NEW-30-50-SQUARE... cmdZViewItem

He's already GOT a pressure switch, why are you suggesting another one?



--
Jeffry Wisnia

(W1BSV + Brass Rat '57 EE)

"Truth exists; only falsehood has to be invented."