Dewhurst switch wiring diagram

Can anyone help with a wiring diagram for a Dewhurst drum switch connected
to a motor with A and Z connections. I am assuming A is the main winding
and Z is the startup. Thank you
Reply to
Loading thread data ...
one single phase motor convention is
A1 & A2 = run winding
Z1& Z2 = start winding including series capacitor. This is used by Brook Motors and maybe others
According to the myford manual
The dewhurst switch has numbers1 to 8 on the switch contacts themselves and 1 to 8 on the connector block and these are not necessarily connected 1 to 1 through to 8 to 8. Very confusing
The numbers I give below relate to the switch contacts themselves NOT the intermediate connector block.
NB I am quoting these from the manual - I do not use the dewhurst switch.
Line in (brown) =1 Neutral in (blue) =3 Start winding (z1)= 2 Start winding (z2)=6 Run winding (a1)=7 Run winding (a2)=5
4 & 8 not used
Dont forget the Earth
If the direction of rotation is incorrect, swap the wires to z1 & z2 OR A1 & A2 NOT both.
Reply to
Bob Minchin
I have some Dewhurst info on the link below - hope this helps
formatting link
Reply to

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.