Originally Posted by TWP723
I've never blown a fuse by holding the button too long. I've always let the slides "tick" a few times before letting go of the button and have never had a problem. The jack on the other hand, I've never drawn that all the way up. Interesting though..
Yeah, the slides have a clutch to avoid overloading the motor. The tick-tick-tick you hear is the clutch operating to avoid tearing apart the slide mechanism.
The jacks need to have 100% of the motor power available to overcome and unknown tongue weight.
The 30A fuse prevents the fire that will occur if the jack motor is jammed for more than a handful of seconds.
It's still good practice to listen to the motor/gear-train and let go of the button as soon as you hear something different/odd occurring. It will add quite a bit of service life to your automated possessions.