Electrical Testing
Tip of the Week: The Practical Safeguarding of Persons and Property

Tip of the Week: The Practical Safeguarding of Persons and Property

Article 90 of the NEC will help you understand why the Code was created and what it covers.

Article 90 precedes Chapter 1 of the NEC. Is it just boilerplate fluff, or should you become familiar with it? The answer is self-evident once you begin reading it.

Article 90 explains important concepts, such as:

The purpose of the NEC. Understanding why we have the NEC in the first place goes a long way toward being able to apply it properly. A misunderstanding of its purpose is at the heart of many “code conflicts” in real applications.

Its scope. Do you really know what the NEC covers and doesn’t cover? This, like its purpose, is an area commonly misunderstood.

How it’s arranged. Can you name the supplemental chapters? Do you know what the NEC means by this? Do you know which Chapter isn’t subject to Chapters 1 through 4 except where specifically noted?

The differences between mandatory rules, permissive rules, and explanatory material. Can you explain these off the top of your head?

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