Rc Lipo wire gauge
- Thread starter Bryanc
- Start date
DogDipstick
100 kW
The marketing lies. Its probably around 20C.
If you honestly try.... to pull " 100C" from a " 8Ah" cell.... through a 10g wire... ( 800A through a 10g).... well that wont last long and probably leave you seeing spots for a few days ( from the arc flash).
Increasing wire sizes and building for real numbers certainly helps. For instance, I have 6ga wire on the cells on my bike. The HK lipos come with 10g. I would heat 10g up way to much riding around. Sure tey can take the small peak of the RC hobby market needs: But EV is kinda a different story.
The marketing lies.
"True " C rate calculators are available online to tell you the " real" c- rate you should expect from any one cell.
If you honestly try.... to pull " 100C" from a " 8Ah" cell.... through a 10g wire... ( 800A through a 10g).... well that wont last long and probably leave you seeing spots for a few days ( from the arc flash).
Increasing wire sizes and building for real numbers certainly helps. For instance, I have 6ga wire on the cells on my bike. The HK lipos come with 10g. I would heat 10g up way to much riding around. Sure tey can take the small peak of the RC hobby market needs: But EV is kinda a different story.
The marketing lies.
"True " C rate calculators are available online to tell you the " real" c- rate you should expect from any one cell.
liveforphysics
100 TW
Bryanc said:
This is why when I use hobby pouch cell packs, I run 1.5-2.2Ah max capacity packs and parallel them all together. I also replace the 10awg with 6awg if the application is very high C-rate.
Chalo
100 TW
Bryanc said:
This is your first battery build, but 10ga wire won't do the job? What are you building, a rail gun? Portable induction furnace? Backpack stick welder?
DogDipstick
100 kW
Turnigy makes some good lipos. Long lasting. I have a Turnigy from 2012, here, still fly RC with it time to time.
skeetab5780
1 MW
While I agree with most posts here there may be someone that has the chart available who can post it here. Probably Spinningmagnets has it. It tell you how many amps a 200deg silicon teflon coated high strand count CU wire can handle per foot and it is way beyond the limits of the below NEC code articles
I dont want to guess since I dont have the chart in front of me but its way higher
like 150a for 12awg at 1' length
or 220a for 10awg at 1' length
I went to school to be an electrician, so most people like me just thing of the code book and go ok a 14awg wire is good for 15amp
a 12awg wire is good for 20amp and a 10awg wire is good for 30amps. But this is not true when it comes to all things
This is for wires run in sheathing thru walls in extreme temperatures for a continuous amperage draw de-rated to 80% capacity even further just to be safe. And these wire runs can be up to 150' from the power source... While it is perfectly safe to go by these calculations, take them with a grain of salt when doing EV conversions
I dont want to guess since I dont have the chart in front of me but its way higher
like 150a for 12awg at 1' length
or 220a for 10awg at 1' length
I went to school to be an electrician, so most people like me just thing of the code book and go ok a 14awg wire is good for 15amp
a 12awg wire is good for 20amp and a 10awg wire is good for 30amps. But this is not true when it comes to all things
This is for wires run in sheathing thru walls in extreme temperatures for a continuous amperage draw de-rated to 80% capacity even further just to be safe. And these wire runs can be up to 150' from the power source... While it is perfectly safe to go by these calculations, take them with a grain of salt when doing EV conversions
nothing as fun as that. I have an 84 Honda xr200 that I am converting. It just seemed wrong that I would use 10 gauge wires to the controller and from the controller to the motor much larger.
That brings up the next question.
How should I design the battery pack given the batteries that I have..
That brings up the next question.
How should I design the battery pack given the batteries that I have..
skeetab5780
1 MW
Bryanc said:
I have a full size dirt bike running on 24s a123 with 12awg 200deg teflon CU wires at 55a peak thru a denzel 4-spd gearbox its pretty darn powerful
and if your only building a dirt bike and will be using LIPO the 10awg wires from the cells are fine unless you are peaking over 200a all the time. your series connections should be only like 6inches long and then your battery output leads you can use 8awg or 6awg
just use good wire, high strand count CU or welding cables
