This is your place to find answers to technical questions about electric cars of all sorts. So....
The question came up recently on how the reset function works on our interurban cars, whether North Shore or CA&E. Most of them have a reset/power switch ("canopy switch") located above the controller. When in the center position, the control system is off; moving the handle to the right turns the controller on. When moved to the left, it will reset the overload relay if tripped, and there's a spring return so the switch cannot be left in the reset position. And you can reset only by turning the control system off.
Note that this reset switch should reset the overload relays on all cars in the train. The way that works depends upon the particular type of control system. Below is a simplified HL diagram for Westinghouse.
In the center at top, the reset switch applies power either to the controller, or to line 8. And line 8 is part of the control jumper, so it connects to all cars in the train. Lower down and to the left, we see the reset coil for the overload relay, which is connected to line 8. So that's pretty simple.
For cars with General Electric MU control, such as the CA&E steel cars, it's a little more complicated. Here is the simplified diagram for C-165.
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