In some cases, the NEC is amended, altered and may even be rejected in lieu of regional regulations as voted on by local governing bodies. Work on the NEC is sponsored by the 2017 nec code pdf Fire Protection Association. First published in 1897, the NEC is updated and published every three years with the 2017 edition being the most current. Most states adopt the most recent edition within a couple of years of its publication.
However, the NEC is the least amended model code, even with it setting minimum standards. No court has faulted anyone for using the latest version of the NEC, even when the local code was not updated. Those who fail to adhere to well known best practices for safety have been held negligent. This creates a system whereby a city can best avoid lawsuits by adopting a single, standard set of building code laws.