Some wiring basics 

I always learn something in Mr. Rich class. Dude is a beast!

Wow. That was awesome!!!!!

22:28 - You have chosen the correct switch for this example, Sir. Your schematic shows the second micro-switch as held closed; which would indicate a normally open switch.

For big motors on the board would be a small relay just to control the heavy-duty relay mounted on the frame controlling the motor. Is that correct?

Ok, run the unit up and opens the limit switch. Now there must be another circuit to run it down or your opening some type of hydraulic valve to do a controlled lowering. Because once the limit opens you ain't power anything up.

Hi do you have any videos about the inverter type refrigerators

It’s 208 three phase 240 is always single phase.

how can i get in these classes?