Drum switch for single phase 220 volt motor

[Rich Miller]

Trying to find out if this wiring will work for Smith and Jones 2HP (Harbor freight Motor) Wanting to run it on 220 volts with drum switch, Single phase. I am restoring an older engine lathe and had to replace the switch and motor, I need this to be able to run forward and reverse. Rotary switch positions and wiring from inside of motor cover is on the drawing. I Would like to wire it correctly and be able to share the results on the net. I have found a few other wiring drawings that were not correct and want to be sure.

 

[Les Jones]

It looks correct to me. For safety you should have an NVR (No volt release.) switch feeding the reversing switch. Any safety interlock contacts should be connected in series wth the maintainer coil on the NVR switch. It would also be a good idea to have another set of contacts on the reversing switch that caused the NVR switch to open if an attempt was made to switch from forward to reverse without first removing power with the NVR switch.

Les.

 

[Rich Miller]

This is a PDF of the latest drawing hope this is more correct