As professional electricians, we always stress that homeowners must never attempt electrical repairs on their own without proper training, licensing, and equipment. This is principally to protect people from high voltage shocks and electrical fires. But it is also important that a house’s electrical system remain up to code.

But just what is this nebulous “code”? It isn’t so nebulous as you might think: it’s called the National Electric Code or the NEC. It helps keep you and your home safe through the standardization of electrical practices.

The National Electric Code

Essentially, the NEC is a collection of what the top experts in fire prevention in the country consider the best standards for safety in electrical wiring, and this set of standards is collected and made available to local governments to use as part of local laws at their discretion. The code is updated every three years, and the current NEC is available to the public in a bound book containing over a thousand pages. The code is also available online through the NFPA’s website.

It depends on your jurisdiction. Your city, state, or municipality will have its own version of the code and its own method of enforcement. Nobody expects you to go read the entire NEC online: local electricians will know how the code is used in their jurisdictions. This knowledge is one of the qualities that separates professional electricians from amateurs. While performing repairs and installations, trained and licensed electricians will make certain that the work done keeps a building within the restrictions of the local version of the NEC.