You are right...( If you have a 1500w griddle and 1500w coffee maker on a 15 amp breaker your pushing 25 amps....)...my bad...sorry...
I understand how a 15 amp split works...I don't know what I was drinking when I wrote that....its just that a 1500 w griddle exceeds 80% of the 15 amp circuit (12.5 amps)....and a non split 20 amp circuit with 2 outlets (kitchen) and 2 - 1500w appliances would get you 25 amps on a 20 amp circuit... That's why I asked about 20 amp splits.