The top ten most-read articles in June covered topics like electrical safety, integrated PLCs and fall protection. Courtesy: Shermco Industries The top ten most-read articles in June covered topics like electrical safety, integrated PLCs and fall protection. Keep reading for more information on these subjects, and others that engineers are interested in. First published in 1979, NFPA 70E, Standard for Electrical Safety in the Workplace, has evolved tremendously over the years.