DX8 telemetry - flight pack voltage sensor wire thickness

[alistair.howie]

Probably a dumb question, but how can the DX8 telemetry voltage sensor wire that attaches to the flight battery connections be made of such thin wire, when the main positive and negative wires coming out of a 6s 5000mAh battery have to be so thick?

Seems like if I connect this up the first thing that's going to happen is the sensor wire's going to melt. Clearly this won't happen as the sensor is rated to 60V, but how is that possible? My electrical knowledge is slim, but if someone can explain, that would be very helpful!

Thanks in advance.

[Mark_T]

The wires have to be thick because of the current the ESC/motor will draw, not becuase of the voltage.

The sensor is not going to be drawing any current to speak of, so thin wires are fine.

[alistair.howie]

Of course! Current is "pulled" from a battery by a device, depending on what that device needs to operate. It's not "pushed" out regardless. But the volts are independent of the current draw, right? Got it!

Thanks very much.

[bolders]

Of course! Current is "pulled" from a battery by a device, depending on what that device needs to operate. It's not "pushed" out regardless. But the volts are independent of the current draw, right? Got it!

Thanks very much.

Correct. The voltage provides the potential for current to flow through a resistance (electrical load) and is determined by the equation V = IR. So the current flow is determined by the applied voltage and the size of the load I = V/R

Voltage is analogous to water pressure whereas the current is equivalent to the flow of the water. Cant get no flow without a pressure to drive it - Its the same with electrickery