[jimbo2012]

Agree it's not really an issue cost, it is only a bit more.

But a 15A can have up to 1440 watts. The math: (120V * 15A) * 80% = 1440 watts. 80% is a safety margin, so the circuit is not at 100% load.

Since this would be a dedicated circuit and the biggest plasma only draws 700 watts it is more than adequate but the 20A can't hurt.

The 12 wire will be a bit more of a pain to snake thru the wall and into the circuit box.