Please help me connect reversing motor switch like this one:
http://cgi.ebay.com/Forward-and-Reve...QQcmdZViewItem
to a 1 phase 115v motor. Motor has 6 wires coming out.
Switch has 3 positions: forward-stop-reverse.

According to Alex :
Please help me connect reversing motor switch like this one:
http://cgi.ebay.com/Forward-and-Reve...QQcmdZViewItem
to a 1 phase 115v motor. Motor has 6 wires coming out.
Switch has 3 positions: forward-stop-reverse.

One of those wires is probably the safety ground. It should be
either plain green (if old) or green with a yellow strip (for a newer
motor). I presume that the motor nameplate says that it is capable of
operation at either 115 VAC or 230 VAC. If so, the six wires should be:


(1)-----WWWWWWWWWW------------(2) 1st run winding

(3)-----WWWWWWWWWW------------(4) 2nd run winding

(5)-----WWWWWWWWWW---)|-o-o--(6) start winding with cap
and centrifugal switch

(Warning -- the numbers are for my convenience, and are likely
to not match any on the motor in question. See the maker's
label or information under the wire access cover.)


Now -- for running at 115 VAC, you want the following
connections for forward:

(L1) -- (1) -- (3) -- (5)

(N) --- (2) -- (4) -- (6)

To reverse it, interchange (5) and (6) in the above connections.

For -- running at 230 VAC, want the following connections for
forward:

(L1) -- (1)

(2) --- (3) -- (5)

(L2) -- (4)

with (6) also connected to (L1) for one direction, and to (L2) for the
other.

Beware that the changing of the connections of (6) (and perhaps
(5) for 115 VAC) while the motor is spinning will not reverse it until
it has slowed down to a stop and then been switched back on.

Now -- your problem is that your switch does not have enough
poles to handle both reversing and start/stop functions on a motor like
this. You need a third pole to interrupt power to both sides while
stopping the motor, so there is no part of the winding powered when the
motor is stopped -- so you are less likely to get a shock form the motor
if water gets into it while it is stopped.

A "drum" switch has the needed contacts to reverse everything
and to stop the motor safely.

For your 115V operation, you could switch the motor so it would
reverse with your switch, but you would need another switch to handle
the start/stop function.

Go up to the section for 115V operation, and connect the center
two terminals of the switch to (3) and (4) in place of the wires from
(5) and (6).

Then connect the opposite corners of the switch terminals in an
'X' shape, and connect one side of the 'X' to (5), and the other to (6).
You will still need another switch between (L1) and (1) to turn off the
motor. And -- you have another problem -- that center "stop" position
is wrong for the motor, because it can allow you to switch on the motor
(with the other switch) while the start winding is disconnected, which
will cause the motor to hum loudly, and if left switched on, it will
burn up.

If you were running the motor from 230V (which might be a better
choice anyway, if it is 1HP or larger, as it will draw less current and
be less likely to trip the circuit breaker), you can wire the switch to
start/stop the motor and to reverse it -- but for safety, you will want
to unplug the motor when not using it, since one side will stay live.

Let's go back to my drawing for 230 VAC operation, and set up
the switch as follows (the terminals are):

(A) (B) (C)



(D) (E) (F)

O.K. First -- connect a wire between (A) and (C)

Connect (L1) to (B).

Connect (A) or (C) to (1) (it doesn't matter which, since they
are connected together anyway.) (1) is already connected to
(L1)

Connect (D) to (A)

Connect (F) to (4) (which is already connected to (L2).

Now -- you should have the motor stop when the switch is in the
center position, and it should run in one direction with the toggle is
thrown to one side, and it should run in the other direction when the
toggle is thrown to the other side. And the enforced pause in the stop
position will keep you from switching on through and keeping running in
the wrong direction.

But -- a drum switch will be safer. It is 3PDT -- and often has
the 'X' crossover already in place.

Good Luck,
DoN.
--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

DoN,

this is a great description! Now everything is clear. Including the fact that I bought a
wrong switch - it has no start/stop function

Thanks,
Alex

DoN. Nichols wrote:
According to Alex :

Please help me connect reversing motor switch like this one:
http://cgi.ebay.com/Forward-and-Reve...QQcmdZViewItem
to a 1 phase 115v motor. Motor has 6 wires coming out.
Switch has 3 positions: forward-stop-reverse.


One of those wires is probably the safety ground. It should be
either plain green (if old) or green with a yellow strip (for a newer
motor). I presume that the motor nameplate says that it is capable of
operation at either 115 VAC or 230 VAC. If so, the six wires should be:


(1)-----WWWWWWWWWW------------(2) 1st run winding

(3)-----WWWWWWWWWW------------(4) 2nd run winding

(5)-----WWWWWWWWWW---)|-o-o--(6) start winding with cap
and centrifugal switch

(Warning -- the numbers are for my convenience, and are likely
to not match any on the motor in question. See the maker's
label or information under the wire access cover.)


Now -- for running at 115 VAC, you want the following
connections for forward:

(L1) -- (1) -- (3) -- (5)

(N) --- (2) -- (4) -- (6)

To reverse it, interchange (5) and (6) in the above connections.

For -- running at 230 VAC, want the following connections for
forward:

(L1) -- (1)

(2) --- (3) -- (5)

(L2) -- (4)

with (6) also connected to (L1) for one direction, and to (L2) for the
other.

Beware that the changing of the connections of (6) (and perhaps
(5) for 115 VAC) while the motor is spinning will not reverse it until
it has slowed down to a stop and then been switched back on.

Now -- your problem is that your switch does not have enough
poles to handle both reversing and start/stop functions on a motor like
this. You need a third pole to interrupt power to both sides while
stopping the motor, so there is no part of the winding powered when the
motor is stopped -- so you are less likely to get a shock form the motor
if water gets into it while it is stopped.

A "drum" switch has the needed contacts to reverse everything
and to stop the motor safely.

For your 115V operation, you could switch the motor so it would
reverse with your switch, but you would need another switch to handle
the start/stop function.

Go up to the section for 115V operation, and connect the center
two terminals of the switch to (3) and (4) in place of the wires from
(5) and (6).

Then connect the opposite corners of the switch terminals in an
'X' shape, and connect one side of the 'X' to (5), and the other to (6).
You will still need another switch between (L1) and (1) to turn off the
motor. And -- you have another problem -- that center "stop" position
is wrong for the motor, because it can allow you to switch on the motor
(with the other switch) while the start winding is disconnected, which
will cause the motor to hum loudly, and if left switched on, it will
burn up.

If you were running the motor from 230V (which might be a better
choice anyway, if it is 1HP or larger, as it will draw less current and
be less likely to trip the circuit breaker), you can wire the switch to
start/stop the motor and to reverse it -- but for safety, you will want
to unplug the motor when not using it, since one side will stay live.

Let's go back to my drawing for 230 VAC operation, and set up
the switch as follows (the terminals are):

(A) (B) (C)



(D) (E) (F)

O.K. First -- connect a wire between (A) and (C)

Connect (L1) to (B).

Connect (A) or (C) to (1) (it doesn't matter which, since they
are connected together anyway.) (1) is already connected to
(L1)

Connect (D) to (A)

Connect (F) to (4) (which is already connected to (L2).

Now -- you should have the motor stop when the switch is in the
center position, and it should run in one direction with the toggle is
thrown to one side, and it should run in the other direction when the
toggle is thrown to the other side. And the enforced pause in the stop
position will keep you from switching on through and keeping running in
the wrong direction.

But -- a drum switch will be safer. It is 3PDT -- and often has
the 'X' crossover already in place.

Good Luck,
DoN.

Alex wrote:

Please help me connect reversing motor switch like this one:
http://cgi.ebay.com/Forward-and-Reve...QQcmdZViewItem
to a 1 phase 115v motor. Motor has 6 wires coming out.
Switch has 3 positions: forward-stop-reverse.

http://www.metalwebnews.com/howto/el.../elec-mtr.html