RC4WD Excavator

[Espeefan]

10 gauge wire would be a safer bet for 30 amps continous draw. Yes, some smaller sized wires can handle current spikes, (like motor start up) but it's not intended for continuous draw. 12 gauge wire is normally considered safe for 20 amps, but I see the bigger concern here being the fact that the tethered wire, from the power supply, is long. With 14 gauge wire, and a long run length, the motor is starved for power. 14 gauge is maybe good for 15 amps, but normally, more like 10 amps. The longer the wire run, the more resistance and voltage and current drop you have.

I have a hard time believing the brushless motor draws 80 amps continuous. That is quite an unreasonable amount of current to just turn a pump. A 6500 mili-amp pack would be dead in less then 5 mins, not to mention the battery would probably be destroyed. The motor might very well be rated to run at up to 80 amps continuous, but it probably does not. More likely that marketing likes to use that as a measure of power, saying their motor is pretty hot stuff, compared to what else is out there.

380 Kv is not so odd. It's an out-runner motor (the can spins with the motor shaft), and they typically run lower RPMs, but are better known for their torque and power, vs. an in-runner design.

[CustomRCmodels]

Originally Posted by Espeefan

10 gauge wire would be a safer bet for 30 amps continous draw. Yes, some smaller sized wires can handle current spikes, (like motor start up) but it's not intended for continuous draw. 12 gauge wire is normally considered safe for 20 amps, but I see the bigger concern here being the fact that the tethered wire, from the power supply, is long. With 14 gauge wire, and a long run length, the motor is starved for power. 14 gauge is maybe good for 15 amps, but normally, more like 10 amps. The longer the wire run, the more resistance and voltage and current drop you have.

I have a hard time believing the brushless motor draws 80 amps continuous. That is quite an unreasonable amount of current to just turn a pump. A 6500 mili-amp pack would be dead in less then 5 mins, not to mention the battery would probably be destroyed. The motor might very well be rated to run at up to 80 amps continuous, but it probably does not. More likely that marketing likes to use that as a measure of power, saying their motor is pretty hot stuff, compared to what else is out there.

380 Kv is not so odd. It's an out-runner motor (the can spins with the motor shaft), and they typically run lower RPMs, but are better known for their torque and power, vs. an in-runner design.

yes sure , outrunner , but that darn low rpm's ?
and yes about the marketing , something can't be right with these numbers , besides the fact that it's pulling current like **** if Joe uses 14 gauge wire to heat his backyard .