Sep 10, 2006, 12:11 PM DaveC DaveC Guest n/a Posts 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
 Sep 10, 2006, 04:11 PM Bob Minchin Bob Minchin Guest n/a Posts Re: Dewhurst switch wiring diagram "DaveC" wrote in message news:8kXMg.6049\$s4.696@newsfe3-win.ntli.net... > 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 > > 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. HTH Bob
 Sep 10, 2006, 06:11 PM Steve Steve Guest n/a Posts Re: Dewhurst switch wiring diagram DaveC wrote: > 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 I have some Dewhurst info on the link below - hope this helps http://uk.geocities.com/iron_museum/dewhurst Steve