Will your home improvement project add electrical wiring to your existing system? Then stop right there. One out of every four homes needs an electrical service upgrade before new or additional wiring is installed.  Modern family needs usually require at least a 100 amp electrical wiring service. To assess your electrical wiring needs and to do the work, always rely on a licensed professional electrician to do electric wiring for you. You should never attempt to work with electrical systems on your own.