This question already has an answer here:
- How to carry high current on PCB 7 answers
According to The Circuit Calculator my 18 amp traces on 4 oz copper need to be about 160 mils. Only problem is I don't have room for this.
I've seen boards use raised bus bar and also solder bus bar directly to the trace to increase current capability. Has anyone tried this? Is there any major issues with doing something like this? Also what type of metal should I use for the bus bar??