 Jog circuits are useful when you may need to momentarily bump, inch, or move a motor as opposed to having the motor run continually when you hit the start button. In this video, we're going to look at how you would wire up a circuit for jog with a control relay. So here we have the schematic. We have your typical stop normally closed push button, a start normally open push button, a jog normally open push button. Then we have a control relay coil, which has the associated contacts with them and the motor contactor with the associated contacts with it as well as the overloads, the three overloads denoting a three-phase motor. What's going to happen now is if we hit the start button, we're going to run through the sequence of events that occur. The moment I push down this normally open start contact, what will happen is current can flow all the way through and the CR coil or the control relay coil can energize. Any contact that is associated with the coil will end up doing what it's supposed to do. The normally opens will close. So this normally open CR contact closes and this normally open CR contact closes. But that's not all that happens because what will happen now is not only can current flow through here and energize CR, but current can now flow through and energize the M or the motor starter contact. So we see here that M now is energized. This starter coil is energized, which means that the contacts themselves will close as well. So what'll happen now is starts goes through CR is energized, which closes CR contacts which energizes M, which closes these contacts were closed when that closed, the M contacts were closed when M energized, and now my hold-in contacts will keep the circuit running, even if I let go of this start switch. Even with the start switch unengaged, I still have a path for my current to go down through over here and keep M energized. So the motor will continually run. So in order for my motor to run, I have to have both the CR coil and the M coil energized. When I push the stop button that interrupts the current through the whole circuit and basically everything drops out. Now we're going to look at what happens when we hit the jog button. When we hit jog, the CR is not energized because it is being held out through this normally open push button. So it will run through and I will energize M, which will in turn close the M contacts. But because CR is not energized, the CR or normally open contacts are de-energized and the CR normally open contacts here de-energized. Current does not have a path that will not cross over this open part of the circuit and M will stay running as long as the jog button is pushed. The moment I let go of that jog button, you'll see that M will drop out. And with the jog button back to its normally open position, there's no longer a path for M coil to energize. CR is open as it always was and then M opens as well and you're back to a complete de-energized state. And that is how you can have a jog circuit utilizing a control relay.