nope, just the microwave and toaster is enough, the toaster pulls over 10-12 amps itself, the microwave is 1kw at 120v so 8.4 amps, 18.4 amps sure will blow a 15amp breaker..

I have an old sunbeam toaster that draws 13.5 amps that I never use in my house because I can never be sure an outlet is isolated enough that I won't throw a breaker because it has another load on the circuit, and 1.5 amps sure isn't a lot of wriggle room on a 15amp breaker.