By pass switches

Question:

What are some examples of a bypass switch?

Answer:

A bypass switch.
This would be put in parallel with a device to switch it off when a certain condition was reached.
(a) A thermostat in an electric iron could short out the heating element when a certain temperature was reached
(b) A light sensitive resistor would be put in parallel with a street lamp so that when there was enough daylight the street lamp would be shorted and so switched off
(c) You could simply put a manual switch in parallel with a motor to turn it off
In all these cases the bay pass switch would have to have some form of protective resistor in series with it to prevent the by pass circuit overloading .