Fuses

It is generally correct to fuse the DC line between the motor and ESC with a brush system especially if the controller has the BEC feature.

You can't fuse the motor side of a Brushless system because it's not the DC link. The output of a brushless controller is a 3 phase AC type chopped voltage, you'd need 3 fuses and at least two would have to blow to protect the system.

With the Maxµ35-21 controllers that have the BEC function, we provide a separate input wire for the BEC circuit and the controller logic that you connect to the battery side of the system fuse. This wire carries only up to about 2A peak, so is only 22 AWG. It is also advised to install a switch in this line so that the receiver can be exercised with the fuse out. This has been proven to be a totally reliable and effective way to accomplish BEC with a brushless system.

If you don't use the BEC function, you just fuse the main DC buss and connect the third wire to a voltage point less than 14 cells. You can still switch this wire to turn the motor controller on and off.

If this sounds confusing, we supply easy to read diagrams with our instructions and it's a lot simpler than it sounds.

So, there is more than one way to "skin the cat":-) Regards, Tom Cimato - MaxCim Motors, Inc.