[ASK] cable and battery become hot

[chazter]

i'm newbie,
i try to make a thruster using brushed DC motor like this http://postimg.org/image/6fp4ru8xd/
but the cable and baterry become hot? is there anything wrong?
thanks for help

[scubersteve]

Generally, if your battery and wiring overheat it is because you are drawing more current than they can handle.
What size wiring are you using?
What type of battery?

[chazter]

1.5 mm wire
3s LiPO Battery

[scubersteve]

Well your wire is much too small if it is 1.5mm including the insulation.
I personally don't go smaller than 18 gauge wire for my motors.
It also sounds like your lipo battery doesn't have a high enough discharge rate if it is getting too hot.