PCB design for DC controlled AC switch using triac

[DatsAbk]

Hello,
I'm working on a home automation project where I'm using a Triac as a switch to control it using microcontroller

I would be testing it at very high current say 20A.

The confusion I'm facing is about the precautions for PCB design.

How much track width required for such high power applications??

Will it provide enough isolation if I just make a two-layer PCB with DC on top layer and AC at bottom layer?

 

[marce]

https://www.saturnpcb.com/pcb_toolkit.htm
Is microprocessor on same board as triac?

 

[tpetar]

Triac should be isolated separately from main control PCB, that will be good, but you also can have triac on board, in both cases triac needs appropriate heatsink for up to 40-60W (check datasheet data for correct value). That heatsink need space, and you should use isolated triac.