Where is the series street light circuit normally switched on and off from?

The series street light circuit is typically switched on and off from the secondary side of the transformer. This is because the secondary side is where the low-voltage distribution for street lighting occurs, allowing for safe and effective control of the individual lights in the system. Controls, like relays or timers, are often installed in this area to manage the power supply to the streetlights based on demand or ambient light conditions.

Switching at the primary side of the transformer may not be practical due to higher voltages and increased safety risks. Additionally, switching from both sides of the transformer would not provide a continuous mechanism for controlling the street lights as effectively as using the secondary side. A control panel can manage operations, but it typically interfaces with the secondary circuit for direct control of the lights rather than being the primary switching point. Thus, managing the circuit from the secondary side ensures both safety and functionality in street lighting operations.