We set up a residential kitchen for an electric cooktop by running a 8-3 romex to the kitchen.The owner got a "Melie" cooktop which is 3 seperate units each rated at 2.8 KW ...mounted side by side only 30inches wide each with its own seperate flex wipp with 12 gauge wire in the flex. Can all 3 be connected to the 8-3 romex that we installed and protect them with a 40 amp breaker???