While it is not the popular answer, the best one is … very little. Most states and municipalities allow homeowner to perform basic handyman tasks in their own home. That being said, it is still risky to do most electrical work yourself.
One prong is bigger than the other to insure the “hot” and neutral are always correct for those appliances that need them.
Wires have size numbers that express their diameter - this size number is referred to as "gauge."
NO - This is NOT safe.
Yes, unless the outlet is for a dedicated appliances like a garbage disposal, refrigerator or dishwasher.
It has been asked if it is all right to replace a fuse or circuit breaker with a larger one to prevent them from blowing or tripping.
Usually the problem is simply an overload and you only need to run fewer appliances on the circuit.
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