# 4.2: Homework 4

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1. Give 3 examples of different types of automatic switches typically used in 2-wire control circuits.
2. Name 2 things that the “Hand” position allows us to do in an HOA control circuit.
3. Design, draw and describe (with words) your own HOA circuit. Make sure to label your schematic and that your description indicates how it operates.
4. Is there, or why should there be, a testing/commissioning period of all new motor control circuit installs? You should give at least 2 reasons.
5. What is a pushbutton station?
6. What is a benefit of having multiple pushbutton stations? What is a disadvantage of having multiple pushbutton stations?
7. If I wanted to add an additional stop function to a motor control station, should I wire the new stop in series or parallel with the other stop pushbuttons?
8. If I wanted to add an additional start function to a motor control station, should I wire the new start in series or parallel with the other start pushbuttons?
9. Design, draw and label a motor control circuit that uses 4 pushbutton stations and 4 E-Stops.
10. Explain why it’s best to think of all of the additional push button stations needed before the installation takes place.

This page titled 4.2: Homework 4 is shared under a CC BY-SA 4.0 license and was authored, remixed, and/or curated by Ken Dickson-Self (OpenOregon) via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.