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Proper ESC Wiring

I have the Signal and GND wires plugged into S1 and GND on my Flight Controller. I don’t recall where I saw this, but I made sure I did NOT connect the red wire to the Flight Controller, just the Signal and GND. Can someone help me to understand if that is correct and what is the logic behind it?

Using this Flight Controller. https://www.banggood.com/FuriousFPV-F-35-Lightning-Flight-Controller-AirSpeed-Sensor-GPS-Module-Bluetooth-Module-p-1278861.html?rmmds=search&cur_warehouse=CN

Removing the red wire from ESC is common and a good thing to do !

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If it has a red wire from the ESC it generally means it has a internal 5v regulator. You never join more than one of those together or to the Flight controller that has it’s own power as the voltages will never be the same and will fight each other.

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Servers by jDrones