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If you are at all uncertain about what is correct or safe, don't do it.Contact someone qualified -- a licensed electrician or your local electrical inspector. National Electrical Code (NEC) and our own experience.Plus, materials such as wire insulation can deteriorate over time.If you don’t know when your wiring was last inspected, it’s worth paying a licensed electrician to give it a once-over, especially if you have any of these warning signs: Instead of the standard copper wire, many houses built in the 1960s and early 1970s have aluminum wiring, which is considered a safety hazard.The lights come on when you flip the switch, the TV works, and the refrigerator keeps food cold.

Massachusetts has adopted the National Electrical Code as the law, with some significant changes and additions.It is not unusual to find all new wiring at the breaker panel and old knob and tube wiring for the lighting circuits on the top floor of the home. Installations have to be evaluated on a caseby-case basis.Safety usually depends on the history of modifications and upgrades Most home insurance companies will not write new policies on homes with knob and tube wiring.Electricity is no joke; mistakes can result in shocks, fires, mutilation, or death. Our explanations are intended to provide general background information as a starting point for further study.We want you to be an informed, educated consumer of electrical services. If you have questions or doubts about what we say, please let us know.