Also of note is 2 AC on 15 amp circuit. Not only is this iffy, because the circuit may have other items on it, say a freezer in the garage, which could cause an overload on the circuit, causing it to open. If 2 AC are running on 15 amp, you also stand a very great chance of low voltage. Voltage lower than 105 will cause AC to increase power and therefore heat damage which you do not see until the AC dies prematurely. Using an undersized extension cord or hockey puck adapter will over heat those items and cause melt down and fire hazards.
