If you try to use NFPA 70E as a quick reference on a job-by-job basis rather than take the time to understand it, you could be headed for serious trouble. But it has so much information! How can you possibly grasp it all? Apply the same principle you use to isolate the cause of a problem when troubleshooting. Divide it into discrete areas.
This standard is composed of three chapters. Chapter 1 (35 pages) provides the general principles of working safely, along with foundational information for understanding and applying those principles. It starts with a fairly comprehensive glossary; take the time to learn these terms; you won’t be sorry you did.
The next three Articles (105, 110, and 120) are fairly short; they focus on an employer’s responsibilities in establishing safety-related work practices and a safe work environment.
Article 130 takes up more than half of Chapter 1. Its focus is on assessing risks and protecting against them. If your work involves electrical hazards, make a point of becoming very familiar with Art. 130. That isn’t easy, as this Article contains several pages of tables and is fairly heavy reading.
Break it down into daily study; spend 15 minutes each day reading a few subsections until you’ve worked your way through it. Then repeat that process a few times. You will easily become Art. 130-proficient.