okay so question.  I am running several sets of 2 miner on 20 Amp Breakers.   12 gauge  wire.  No issues.

I am getting a few more miners soon, my breaker box is full.

So I see no issue my changing the 20 Amp Breakers to 30 Amp Breakers, and then putting 3 miners on each circuit, that is what I have read here.  

If this is the case, can I keep 12 gauge wire (will three miners work ok hooked up to a 30 Amp breaker running on 12 gauge wire?)  

Or do I need to go with 10 Gauge wire?   The distance from the outlet to the breaker box is less than 3 feet, very close..

Dumb question, I know 40 amp breakers are available, why not go with those, or best to keep the 30 amp?

Thank you!

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(Moderator's note: This post was edited by frodocooper to remove an unnecessarily quoted post.)