Can you replace a 15 amp receptacle with 20 amp?
Keeping this in consideration, is it OK to replace a 15 amp outlet with a 20 amp?
A 20 Amp breaker does not adequately protect a 15 Amp outlet. The breaker is supposed to pop instead of, or before the house burns down. Even in the very unlikely event that you have 20 Amp wiring, the appliances plugged into the 15 Amp outlet need to be protected with 15 Amp breakers.
Secondly, is my outlet 15 or 20 amp?
Look at your outlet. If the two slots are parallel, it is a 15 amp outlet. If one slot is 'T' shaped and the other is straight, it is a 20 amp outlet that will also accept 15 amp plugs. If the two slots are perpendicular the outlet is 20 amp only.
for a 15 amp circuit this allowed for 10 outlets and on a 20 amp circuit 13 outlets were allowed.