An electrician is a skilled tradesperson who specializes in the installation, maintenance, and repair of electrical systems. At times, an electrician may also be called upon to perform tasks such as soldering and wiring. Soldering is a process in which two or more metal items are joined together by melting and flowing a filler metal into the joint. Wiring involves connecting electrical components using insulated cables. Electricians must have a thorough knowledge of electrical codes and safety regulations in order to ensure that their work is safe and up to code.