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	Subject - interlocking motor starter nino I need a schematic or wiring diagram about interlocking motor starter; To conect three motor starter in interlock.Thank you in advance. Nino, Puerto Rico. JimmyDee Welcome Neno to the forum. I don't have a way to get a diagram here but I can e-mail one to you tonight or tomorrow but need a little more information. How do you want these motors to be interlocked. Do you want them all to start at one time or all drop off if one does or what? Jim nino Thank you JimmyDee; I need that a motor is running before othes may be started, for example motor 1 must be running before motor 2 can start and motor 2 must be running before motor 3 will start.Thank you JimmyDee. nino. JimmyDee I'll give you a written answer before I do the drawing and see if you can understand before drawing one out for you. Basically, you need to add an additional set of contacts to the first 2 starters. These are called auxiliary contacts and every manufacturer does them a little different so I can't tell you what yours might look like. This set of contacts will close when the starter is energized. If you take the set of contacts from the first starter and use it just like a stop button, wire it in series with the second starter, it will not allow the second starter to energize until it is closed. Now wire the axillary contacts on the second starter in series with the stop circuit of the third starter and that will keep the third starter from starting until the second is energized. If this sounds complicated, just draw 3 starter circuits side by side on a large piece of paper and leave a gap in the line between the stop button and the start button on starter 2 & 3. where this gap start and stops, run a wire to each side of the new axillary contact of the previous starter. Hope this helps. Jim nino Thank you for your excellent explication,it was valious to me. nino.