Our focus for this article will be 2011 NEC Articles 312 and 314. These two articles deal with similar subjects, so they have some conceptual overlaps.
As inspectors, we know that proper electrical connections are vital to the long-term success of every electrical system.
NEC Article 310 deals with conductors. Conductors are used on every electrical installation, so naturally we have a variety of installation conditions and a wide range of applications.
The 2012 edition of NFPA 70E added the term inspection in its scope, answering the question about whether or not 70E applies to electrical inspectors in the workplace.
We’ll pick up where we left off with 300.6, Protection against Corrosion and Deterioration. The basic requirement is that equipment must be suitable for the environment in which it is installed.
I like to refer to this area of the code as the "nuts and bolts” of an electrical installation. Chapter 3 is entitled Wiring Methods and Materials, and it covers much of the mechanical portion of the code.
In doing so, we will not cover every section of Article 250, but concentrate on those that are used most commonly by multi-trade inspectors.