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UBEC wiring

lobstermash

Propaganda machine
Mentor
#1
I got a couple of really cheap UBECs on ebay. Unlike other UBECs though, they have battery input wires that correspond to a Futaba type connector. I was confused at first, as I wasn't sure what to do with the third input wire (the white one). Doing a bit of Google research, it seems the white wire on Futaba type connectors is a signal wire. Therefore, this wire is redundant, right? The white wire on these UBECs goes straight through the UBEC's shrink wrap. I'm guessing I can remove the white wire altogether? Is that right?
 

Ak Flyer

Fly the wings off
Mentor
#2
I think I follow you, my batteries an switches for my nitro planes use a similar connector I think, but they only have two wires. A picture would be worth a thousand words in this case.
 

fred0000

Senior Member
#5
the white wire is not needed, you are correct. make sure to pull the red wire from the ESC's receiver plug when using an external BEC.
 

lobstermash

Propaganda machine
Mentor
#6
Yeah, I wasn't sure about that. The ESC doesn't have a built in BEC. Do I still need to disconnect the red wire?

Just done a bit more research. If you have an ESC with a BEC build in, you need to cut the red/orange (depending on brand) wire to make the UBEC work properly. However, if you have an OPTO ESC, you should not cut the red/orange wire.
 
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