I dont think so. Its happened to me before and i cant recall an issue
If you are going to go through the trouble of running a spare circuit.. why not run a #12 and CYA...So I'm on a kitchen final and I need to get out of there to other jobs . I always run one 15 amp dedicated circuit under the sink as part of the appliance package I offer to that contractor. I knew they were getting a GD, it's in the paperwork. The customer decided to add a 850 watt instahot too.
My total combined amperage from both appliances nametags are 14.7 amps. I installed a duplex in place of the single receptacle. Do you think this will pose a problem down the line?
A small tankless water heater at the kitchen sinkWhat is an instahot?