Guage wires?
http://www.rbeelectronics.com/wtable.htm
It is the bottom chart.
Many electrical problems are caused by bad connections (I solder every one to be sure) and under size wire that results in excessive voltage drop. I hope this helps.

It won't hurt anything but depending on the amperage and length it sounds like 10 ga. is overkill. 10 ga. will carry 50 amps 15ft!

