When working on my addition I noticed a situation at one of the outlets in my kitchen that I question. The electrician who originally wired my house installed what is supposed to be a 20 amp circuit. He used a 20 amp breaker in the panel and wired the entire circuit with #12 gauge wire. However, upon looking at the device at one of the outlet boxes I noticed that he installed an outlet that is only rated for 15 amps and not 20 amps. Is this a danger or a fire hazard? Should I replace the outlets with ones rated for 20 Amps?