10 Apr
2021
10 Apr
'21
12:24 a.m.
I put a toggle switch in that application in the mid 80's at Worcester Polytech, where it worked well for at least 20 years. Just don't use a tiny subminiature toggle switch. The one I used was reasonably beefy - probably rated at 10A or more.
The relay coil is inductive and will cause an arc when you open the switch, potentially burning out small contacts over time. If you are pressed for space and need to use a small switch, you can mitigate the arcing problem with a flyback diode. See https://en.wikipedia.org/wiki/Flyback_diode
-Joe KM1P